Species Descriptions

Argyreia variabilis

Author:
Staples, G. & P. Traiperm.
Contributors:
Distribution Map:
Author:
Staples, G. & P. Traiperm.
Distribution:

Thailand. Endemic

Ecology:

In dry evergreen forest, secondary forest
regrowth after logging; elevation: c. 600–850 m.

Editor:
George Staples, Esmond Er
Flowers:
Flower sepals subequal, entire, broadly obovate to orbicular, 15–17 by 11–13 mm, glabrous on both sides; corolla campanulate, 6–7 cm long, pinkish to dark purple, fleshy, tube gibbous, paler inside, limb entire to shallowly 10-lobed, 3.2–3.5 cm diam., completely glabrous outside; stamens included, equal, 32–35 mm long, filament bases dilated and hairy; pistil included, disk 5-lobed, almost enclosing ovary, ovary glabrous, 2-celled, style included, 33–40 mm long.
Fruits:
Berry not seen.
Habit:
Woody climber, all parts densely brown pubescent to hirsute; stems to 30 m tall.
Inflorescences:
Inflorescences axillary, crowded, several-flowered cymes; peduncles 1.1–2.8(–3.5) cm long; pedicels 0.5–1 cm long; bracts lanceolate to elliptic-lanceolate, 1.5–2.5 by 0.5–0.8 cm, purplish tinged, apex acute to acuminate, densely brown pubescent outside, glabrous inside, persistent.
Infraspecific Characters:

The species is similar to A. kerrii but differs in the dense brownish tomentum on all vegetative parts and the broadly obovate to orbicular, glabrous sepals.

Accepted name/Authority/Place of publication:

Argyreia variabilis Traiperm & Staples in Staples & Traiperm, Thai Forest Bull. (Bot.) 36: 98. 2008. TYPE. Thailand. Phetchaburi: Kaeng Krachan National Park, 1 Sept. 2001, Traiperm 31 (holotype BKF; isotypes A, BCU, K, KKU).

Leaves:
Leaves ovate or ovate-lanceolate, 10–24 by 4–10 cm, chartaceous, base obtuse or rounded, rarely truncate, apex acute to acuminate; upper side densely brown hirsute; underside densely brown pilose; lateral nerves 14–16 per side; petiole 1.5–5.0 cm long.
Phenology:

Flowering: August, September.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

Mon, 2011-09-26 06:29 -- Esmond
Argyreia thorelii

Author:
Staples, G. & P. Traiperm.
Contributors:
Distribution Map:
Author:
Staples, G. & P. Traiperm.
Distribution:

Thailand, Laos.

Ecology:

Under mixed deciduous forest. Elevation: 180–650 m.

Editor:
George Staples, Esmond Er
Flowers:
Flower sepals unequal, lanceolate to linear, outer 18–20 by 4–5 mm, inner 12–15 by c. 3 mm, hirsute, apex tapering acuminate; corolla salverform, white, glabrous outside, tube cylindrical, 2–3 cm long, limb 5-parted to middle, lobes linear-oblong, 1.6–2 cm long, 4–5 mm wide, acute; stamens exserted, equal, 38–40 mm long, filament bases dilated, papillose, anthers sagittate; pistil exserted, equal to stamens, disc annular, ovary conical, glabrous, tapering into style, jointed above base.
Fruits:
Berry not seen
Habit:
Woody climber from underground tuber, axial parts hirsute with spreading golden hairs; stems to 4 m.
Inflorescences:
Inflorescences axillary, cymose, 3–5-flowered, copiously red-gold hirsute; peduncle 1–1.5 cm, sinuous; bracts oblong-linear, 0.8–1.2 cm, persistent; pedicels c. 5 mm.
Infraspecific Characters:

Vegetatively and in fruit this species is virtually identical to A. leucantha, but the corollas immediately separate the two: campanulate, waxy, with a ruffled limb (A. leucantha); salverform and deeply 5-parted, the lobes linear, delicately membranous (A. thorelii).

Accepted name/Authority/Place of publication:

Argyreia thorelii Gagnep., Not. Syst. 3: 135. 1915.

Leaves:
Leaves oblong-elliptic, 1–14 by 2–5 cm, upper side sparsely scabrid with yellow hairs, underside glabrescent, slightly glaucous, base rounded, apex rounded or emarginate, mucronulate; lateral veins 7–9 per side; petiole 0.7–1 cm.
Phenology:

Flowering: August.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

Synonyms:

Cryptanthela sericea Gagnep., Notul. Syst. 14: 24. 1950.

Argyreia poilanei Ooststr., Blumea 12: 39–40. 1963.

Mon, 2011-09-26 06:27 -- Esmond
Argyreia sphaerocephala

Author:
Staples, G. & P. Traiperm.
Contributors:
Distribution Map:
General comments:

Argyreia sphaerocephala evidently flowers while leafless or may be cauliflorous, with inflorescences developing from leaf axils on older wood. This is a very showy species and deserves to be cultivated. Because the long, whip-like inflorescences hang below the main stems, the stunning flowers can only be appreciated when viewed from below.

Author:
Staples, G. & P. Traiperm.
Distribution:

Peninsular Malaysia, Thailand.

Ecology:

In evergreen
forest on hills; altitude: 250–300 m.

Editor:
George Staples, Esmond Er
Flowers:
Flowers protruding beyond bracts; sepals ovate-lanceolate, subequal, c. 4–6 mm long, mucronulate, glabrous inside, accrescent in fruit; corolla subtubular, 6–7.2 cm long, purple-red, flaring slightly from above middle, limb erect, 5-toothed, appressed yellowish hirsute outside; stamens exserted, filaments glabrous, anthers slenderly sagittate, 3.5–5.5 mm long; pistil exserted, ovary 2-celled, glabrous.
Fruits:
Berry ellipsoid, 13–18 by 10–15 mm, glossy lilac-pink, acute, glabrous, subtended by reflexed sepals.
Habit:
Woody climber to 10 m; all parts sparsely strigose, glabrescent.
Inflorescences:
Inflorescences axillary, pendulous, c. 30-flowered; peduncles whip-like, 25–135 cm long, 1–1.5 mm diam.; outer bracts ovate to elliptic-ovate, c. 5–7.4 by 2.6–5.2 cm, hirsute outside, persistent; inner bracts smaller; pedicels 0.3–0.4 cm, in fruit 0.6–0.9 cm.
Accepted name/Authority/Place of publication:

Argyreia sphaerocephala (Prain) Hoogland, Blumea 7: 183. 1952.

Leaves:
Leaves narrowly ovate, 5–13 by 2.5–7.2 cm, base rounded or shallowly cordate, apex acute to acuminate, mucronate, drying reddish underneath; secondary veins 5–7 either side; petiole 3–7 cm.
Phenology:

Flowering: October, November; fruiting: April, August, November.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

Seeds:
Seed 1, ellipsoid, c. 11–12 by 8–9 mm, glabrous.
Synonyms:

Lettsomia sphaerocephala Prain, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 73(2): 19. 1904.

Mon, 2011-09-26 06:24 -- Esmond
Argyreia sikkimensis

Author:
Staples, G. & P. Traiperm.
Contributors:
Distribution Map:
General comments:

It is peculiar that A. sikkimensis, which grows at moderately high elevation, is not reported from Nepal. On the other hand, although the protologue includes “Silhet” (=Sylhet district, Bangladesh) in the distribution there is no mention of the species in the Flora of Bangladesh account. Argyreia sikkimensis is to be expected in western China (Yunnan or SE Xizang) as well. Curiusly, the Thai collections are all fruiting; flowering material has not been collected yet, though the localities are frequently visited by collectors.

Author:
Staples, G. & P. Traiperm.
Distribution:

India, Bangladesh ?, Myanmar, Thailand.

Ecology:

In hill evergreen
forest; altitude 1200–1700 m.

Editor:
George Staples, Esmond Er
Flowers:
Flower sepals elliptic-obovate, 4–6 mm, inner 3 longer, accrescent in fruit to c. 13–15 mm by 9–10 mm, silvery puberulent outside, inner sepals with broad glabrous margins; corolla campanulate, 4.5–5 cm, purple, tube darker inside, limb c. 3.5 cm diam., entire; stamens included, filaments purple, 2 longer, 3 shorter, bases hairy, anthers purplish, pollen white; ovary 2-celled, , style included, white, stigmas purple.
Fruits:
Berry broadly ellipsoid, 15–18 by 9–12 mm, violet, apex with circular scar, protruding from accrescent calyx.
Habit:
Large twiner; stems appressed strigillose with pale yellowish hairs.
Inflorescences:
Inflorescence peduncles 5–13 cm, sparsely appressed strigose, slightly thicker than subtending petiole; cymes 3–6-flowered; pedicels 0.6–0.9 cm, broadening towards calyx base; bracts 3, inconspicuous or outermost occasionally leaf-like, caducous, 1.5–2.5 cm.
Accepted name/Authority/Place of publication:

Argyreia sikkimensis (C.B.Clarke) Ooststr., Blumea 7: 178. 1952.

Leaves:
Leaves elliptic to ovate or suborbicular, 7–19 by 5–13 cm, retuse to shortly acuminate, base obtuse, cuneate or broadly rounded, upper side glabrous or nearly so, underside silvery sericeous; lateral veins 10–12 per side; petiole 2–10 cm.
Phenology:

Fruiting: July, November, December.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

Seeds:
Seed 1, ellipsoid.
Synonyms:

Lettsomia sikkimensis C.B.Clarke in Hook.f., Fl. Brit. Ind. 4: 194. 1883.

Mon, 2011-09-26 04:51 -- Esmond
Argyreia siamensis

Author:
Staples, G. & P. Traiperm.
Contributors:
Distribution Map:
General comments:

This species must be more common than the number of herbarium collections suggests: it grows sprawling on the ground, half-hidden under fallen leaves, grasses, and underbrush. When in bloom the showy flowers might be noticed, but otherwise the species easily escapes detection. Until quite recently the fruits were unknown and this species was considered an Ipomoea. However in 2001 the fruits were collected and the vivid red, fleshy berries cupped by a reddish calyx proved the species belongs in Argyreia.

This species has horticultural potential: some plants have attractively patterned foliage in addition to the showy flowers; the dark green leaves may be outlined in paler green along the main veins in some individuals. Growing as it does in semi-shaded, understorey situations, which few Convolvulaceae do, this is a further point to recommend cultivation of A. siamensis.

Author:
Staples, G. & P. Traiperm.
Distribution:

Thailand. Endemic; said to be common.

Ecology:

Forest
understorey, often in partial shade under dipterocarp-oak forest, mixed
dipterocarp-pine forest, grassy burned areas, often on poor rocky soil over
granitic bedrock; altitude: 475–1110 m.

Editor:
George Staples, Esmond Er
Flowers:
Flower sepals unequal, outer 3 longer, lanceolate, 10–14 by 2–4 mm, long tapering attenuate into caudate tip, outside yellowish hirsute; corolla tubular-funnelform, 5–6 cm long, tube white inside and out, inside with erect white hairs, limb purple, 1.5 cm diam., ruffled-undulate, outside pilose; stamens included, subequal, 17–19 mm, anthers oblong; pistil included, 19–22 mm, white.
Fruits:
Berry broadly ovoid, weakly 4-lobed, 8–10 mm long, bright red, subtended by reflexed, red sepals.
Habit:
Perennial deciduous twiner or prostrate; stems annual from rootstock, slender, reddish, prostrate or twining, hispid.
Inflorescences:
Inflorescence axillary, cymose, usually 1–3(–5)-flowered; peduncle 0.8–2 cm; bracts linear-oblong to spathulate, 0.4–0.7 cm, hirsute, deciduous in fruit?; pedicels 14–20 mm long.
Accepted name/Authority/Place of publication:

Argyreia siamensis (Craib) Staples, Thai Forest Bull. (Bot.) 32: 149. 2004.

Leaves:
Leaves ovate or ovate-orbicular, 2.7–9.5 by 2–8 cm, base deeply cordate, apex acuminate, acute, upper side green, darker along veins, underside paler green or violet; lateral veins 4–7 per side, conspicuous; petiole 2–6.5 cm, hairy like stems.
Phenology:

Flowering: July–November; fruiting: November.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

Synonyms:

Ipomoea siamensis Craib, Bull. Misc. Inform. Kew 1911. 424. 1911.

Mon, 2011-09-26 04:49 -- Esmond
Argyreia roxburghii

Author:
Staples, G. & P. Traiperm.
Contributors:
Distribution Map:
Common names and uses:
Tan fak , ma lan fug (Thai).
Author:
Staples, G. & P. Traiperm.
Distribution:

Nepal, India, Bhutan, Myanmar, Thailand.

Ecology:

In open scrub jungle, dry dipterocarp forest, on dry slopes in
half-shaded places; altitude 100–400 m.

Editor:
George Staples, Esmond Er
Flowers:
Flower sepals unequal, outer 3 elliptic, 10–12 by 8–11 mm, villous, persistent and reflexed in fruit, inner sepals smaller, broadly ovate, abruptly acuminate, villous at middle, margins glabrous; corolla funnelform, 5–6.5 cm long, pale mauve, throat purple, midpetaline bands sparsely tomentose outside, otherwise glabrous; stamens included, unequal, 16–24 mm; pistil included, disc annular, c. 0.5 mm high, ovary 2 mm long, glabrous, style jointed 1 mm above base.
Fruits:
Berry globose, 13–15 mm, yellow or blackish, pulpy-soft, cupped by reflexed sepals.
Habit:
Woody climber; stems to 4 m or taller, whitish hairy, glabrescent.
Inflorescences:
Inflorescence erect or ascending, dichotomous, laxly cymose, 5 to many-flowered; peduncle 6–13 cm long; lowermost bract foliose, ovate-orbicular, 4–7 by 3.8–6 cm, petiolulate, silvery villous, persistent, other bracts and bracteoles oblong-lanceolate, 1.2–2 by 0.4–0.7 cm, deciduous.
Infraspecific Characters:

Like many widespread species A. roxburghii is rather variable and more careful study of the variability is required before infraspecific taxa are recognized.

Craib (loc. cit.) differentiated Thai plants as variety siamica, characterized by broader outer sepals with a rounded apex. The type collection for this variety, Kerr 1395, certainly has elliptic outer sepals with a broadly rounded apex. However all other Thai specimens seen have ovate or elliptic sepals with a tapering acuminate apex. I am accepting a broadly defined species here and not distinguishing the Thai plants as a distinct variety. Berries have been reported to be yellow or black; this requires confirmation. It may be that as ripening proceeds a colour change takes place.

Accepted name/Authority/Place of publication:

Argyreia roxburghii (Sweet) Choisy, Mém. Soc. Phys. Genève 6: 419. 1834.

Leaves:
Leaves broadly ovate to suborbicular, 7–19 by 5.5–15.5 cm, base cordate, apex obtuse, shortly acuminate, underside whitish villous, upper side only moderately so; lateral veins 9–10 pairs; petiole 3–9 cm.
Phenology:

Flowering: July–September, December; fruiting: January, November.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

Seeds:
Seeds 4, subglobose.
Synonyms:

Ipomoea roxburghii Sweet, Hort. Suburb. ed. 2, 289. 1826.

Argyreia roxburghii var. siamica Craib, Bull. Misc. Inform. Kew 1911. 423. 1911.

Mon, 2011-09-26 04:47 -- Esmond
Argyreia roseopurpurea

Author:
Staples, G. & P. Traiperm.
Contributors:
Distribution Map:
Common names and uses:
Common names and uses. Bai labat (Thai)
Author:
Staples, G. & P. Traiperm.
Distribution:

Malaysia, Thailand.

Ecology:

Primary evergreen
forest, or seasonal dry forest; altitude 100–970 m.

Editor:
George Staples, Esmond Er
Flowers:
Flower sepals unequal, outer ovate-lanceolate, 4–5 by 3.5 mm, outside densely fulvous strigose-sericeous, inner sepals broadly ovate to elliptic, c. 4 by 5 mm, margins glabrous; corolla funnelform, 1.5–2.5 cm long, limb 5-parted, rose pink, inside tube purple, outside midpetaline bands yellowish hirsute, inside glabrous; stamens included, subequal, glabrous, filaments 10–12 mm, bases glabrous, anthers oblong, c. 3.5 mm; pistil included, disc 5-lobed, c. 1.2 mm tall, ovary c. 2 mm tall, glabrous, attenuate, style c. 15 mm.
Fruits:
Berry ellipsoid, 10–12 by 7–9 mm, pinkish purple, base clasped by enlarged reddish sepals.
Habit:
Woody climber; stems 4–8 m, yellowish hirsute, hairs retrorse.
Inflorescences:
Inflorescences axillary, crowded, cymose-capitate; peduncle shorter than subtending petiole, 0.5¬–2 cm, glabrate; bracts linear-oblong, 0.2–0.4 cm, caducous; pedicels 0–4 mm.
Accepted name/Authority/Place of publication:

Argyreia roseopurpurea (Kerr) Ooststr., Blumea 7: 178. 1952.

Leaves:
Leaves ovate, 6.2–15 by 4.7–10 cm, chartaceous, base rounded or truncate, rarely emarginate, apex obtuse, apiculate, upper side glabrous or with few hairs along midrib, underside sparsely villous; lateral veins 7–9 per side; petiole slender, 1.5–7.5 cm.
Phenology:

Flowering: January, March; Fruiting: March.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

Seeds:
Seed 1 (always?).
Synonyms:

Lettsomia roseo-purpurea Kerr, Bull. Misc. Inform. Kew 1941: 15. 1941.

Mon, 2011-09-26 04:42 -- Esmond
Argyreia popahensis

Author:
Staples, G. & P. Traiperm.
Contributors:
Distribution Map:
General comments:

This remains an enigmatic species, known from very few collections. The extremely narrow, linear-oblong leaves seem distinctive, but careful study of type specimens and more collections is needed. In many ways A. popahensis is similar to A. lanceolata and could yet prove to be conspecific with it.

Author:
Staples, G. & P. Traiperm.
Distribution:

Myanmar, Thailand.

Ecology:

Understorey beneath open grassy forest; altitude: 200 m.

Editor:
George Staples, Esmond Er
Flowers:
Flowers solitary (or paired), axillary; peduncle c. 0.3 cm; bracts 2, linear, c. 0.5–0.7 by 0.2 cm; pedicels 4–5 mm, thickened in fruit; sepals subequal, ovate to lanceolate, c. 8–11 by 3–5 mm, apex acute-attenuate (outer) to obtuse (inner), outside densely strigose, accrescent in fruit; corolla narrowly tubular-funnelform, c. 4–5 cm long, midpetaline bands and upper tube yellowish hispid outside, limb vaguely lobed, purple, tube inside white; stamens unequal, included, filaments 5–8 mm, stiffly hairy above insertion, anthers c. 5 mm; pistil included, disc narrowly cupular, sinuate, ovary 2 mm tall, 2-celled, glabrous, attenuate into style base.
Fruits:
Berry (immature) globose, c. 7 mm diam.
Habit:
Prostrate herb from fusiform lignotuber; stems wiry, strigose.
Accepted name/Authority/Place of publication:

Argyreia popahensis (Collett & Hemsl.) Staples & Traiperm, Thai Forest Bull. (Bot.) 36: 97. 2008.

Leaves:
Leaves linear-oblong, 4.5–7.7 by 0.35–0.9 cm, base rounded, apex obtuse, mucronulate, upper side glabrous or sparsely strigose along veins, underside strigose; lateral veins obscure; petiole 0.3–0.7 cm, strigose.
Phenology:

Flowering: October; fruiting: October.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

Seeds:
Seed 1 (always?), ovoid, c. 5 mm, glabrous, minutely reticulate.
Synonyms:

Ipomoea popahensis Collett & Hemsl., J. Linn. Soc. 28: 95. 1890. TYPE. [Myanmar] “Upper Burma” without locality, Oct. 1888, Collett 905 (holotype,K; isotype BM).

Argyreia stenophylla (Kerr) Staples & Traiperm, Thai Forest Bull. (Bot.) 33: 42. 2005.

Lettsomia stenophylla Kerr, Bull. Misc. Inform. Kew 1941: 16. 1941. TYPE. Thailand. Chiang Mai: Mae Taeng, 30 Oct. 1922, A.F.G. Kerr 6490 (isotypes BK, BM, K).

Argyreia lineariloba C.Y. Wu, Rept. Stud. Pl. Trop. Subtrop. Yunnan 1: 134. Plate 38, fig. 1. 1965. TYPE. China. Yunnan: Cho Mo Hsian, Chu Hsiung, 16 Sept. 1938, M.K. Li 0007 (holotype KUN).

Mon, 2011-09-26 04:32 -- George Staples
Argyreia penangiana

Author:
Staples, G. & P. Traiperm.
Contributors:
Distribution Map:
General comments:

The single Thai specimen was collected in Khao Luang National Park, Nakhon si Thammarat province, a long way north of peninsular Malaysia where this species was believed to be endemic. This suggests that A. penangiana must occur in the intervening seven provinces of Thailand as well.

Author:
Staples, G. & P. Traiperm.
Distribution:

Malaysia, Thailand.

Ecology:

Evergreen forest; altitude 200 m.

Editor:
George Staples, Esmond Er
Flowers:
Flower sepals subequal, broadly ovate, c. 4–5 mm long, outer 2 obtuse, inner 3 rounded, outside densely strigose; corolla funnelform, whitish to lavender, centre darker purplish, c. 2–3.5 cm long, tube broad, corrugated inside, limb subentire, midpetaline bands hairy outside, otherwise glabrous; stamens included, subequal, 18–20 mm, filament bases broadly triangular, glabrous, anthers oblong, 2-3 mm; pistil included, 19–23 mm, ovary glabrous, 2-celled.
Fruits:
Berry ovoid, c. 15 mm long, pink.
Habit:
Woody climber; stems sparsely strigose-hirsute, later glabrous.
Inflorescences:
Inflorescence axillary, cymose, 3–30-flowered; peduncle slender, 2.5–20 cm long; bracts linear-oblong, 0.4–0.7 cm, deciduous.
Accepted name/Authority/Place of publication:

Argyreia penangiana (Choisy) Boerl., Handl. Fl. Ned. Ind. 2: 513. 1899.

Leaves:
Leaves ovate to broadly lanceolate, 6–20 by 2.5–11 cm, base cuneate to rounded, apex acute or slightly acuminate, upper side glabrous, underside sparsely strigose, later glabrescent, lateral veins 7 or 8 pairs; petiole slender, 1.5–5 cm.
Phenology:

Flowering: February.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

Seeds:
Seed 1.
Synonyms:

Moorcroftia penangiana Choisy, Mém. Soc. Phys. Genève 6: 406. 1834.

Lettsomia penangiana (Choisy) Miq., Fl. Ned. Ind. 2: 592. 1857.

Mon, 2011-09-26 04:26 -- Esmond
Argyreia ooststroomii

Author:
Staples, G. & P. Traiperm.
Contributors:
Distribution Map:
Common names and uses:
Kor lae ka yoh (Thai).
Author:
Staples, G. & P. Traiperm.
Distribution:

Malaysia, Thailand.

Ecology:

Evergreen forest
and tropical rain forest, near streams; altitude: 150 m.

Editor:
George Staples, Esmond Er
Flowers:
Flower sepals subequal, outer 2 broader, obovate to orbicular, 6–8 mm long, rounded, concave, apex and margins randomly torn; corolla campanulate-funnelform, 2.3–2.6 by 1.5–2.0 cm, limb shallowly 5-lobed, lobes erect (not spreading), white or pale pinkish, red-violet inside tube, midpetaline bands golden sericeous outside, glabrous elsewhere; stamens included, subequal, 14–15.5 mm, filament bases glabrous, anthers sagittate; pistil included, disc 5-lobulate, ovary glabrous, style 13–15 mm long.
Fruits:
Berry broadly ellipsoid, 11–14 by 7–10 mm diam., red, base clasped by persistent (but scarcely enlarged) calyx.
Habit:
Liana, all parts appressed brownish hairy; stems to 6 m.
Inflorescences:
Inflorescences axillary or terminal on lateral branches, crowded-paniculate, many-flowered, bracteose; peduncle: when axillary stout, 1–2.5 cm long, often hidden, when terminal 8–18.6 cm; bracts orbicular-obovate, concave, 0.7–1 cm long, persistent; pedicels 0–6 mm long.
Accepted name/Authority/Place of publication:

Argyreia ooststroomii Hoogland, Blumea 7: 189. fig. 1, a–g. 1952.

Leaves:
Leaves broadly elliptic to ovate, 6.7–11.6 cm by 4.1–6.0 cm, coriaceous, base rounded or retuse, apex obtuse to rounded, mucronate, upper side glabrous, underside sparsely hairy; lateral veins usually 7 (6–8) per side; petiole stout, 1.4–3.7 cm.
Phenology:

Flowering: February, April, July; fruiting: April.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

References:

Staples, G. & P. Traiperm. 2010. Argyreia in Convolvulaceae. Fl. Thailand 10(3): 337–371.

Seeds:
Seed 1, ellipsoid, 9 mm, black.

Mon, 2011-09-26 03:49 -- Esmond

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