Species Descriptions

Jacquemontia tomentella var. tomentosa

Contributors:
Author:
S.J. van Ooststroom
Distribution:

Borneo (Sarawak).

Editor:
G. Staples
Habit:
Like var. micrantha, but the stellate hairs with 3-4, occasionally with 5 rays; rays longer than in var. micrantha; hairs often differing in size, often larger ones mixed with smaller. The indumentum on the lower surface of the leaves is often much denser than on the upper surface; sometimes the upper surface is nearly glabrous.
Accepted name/Authority/Place of publication:

Jacquemontia tomentella var. tomentosa Ooststr., Blumea 3 (1939) 278.

References:

Ooststroom, S.J. van & R.D.Hoogland. 1953. Convolvulaceae in FloraMalesiana 4: 434.

Mon, 2012-06-25 08:15 -- George Staples
Jacquemontia tomentella var. heteroradiata

Contributors:
Author:
S.J. van Ooststroom
Distribution:

SE. Borneo.

Editor:
G. Staples
Habit:
Like var. micrantha, but the stellate hairs of two kinds, for the greater part as in var. micrantha otherwise with 8–10 rays, one of which is much longer and erect.
Accepted name/Authority/Place of publication:

Jacquemontia tomentella var. heteroradiata Ooststr., Blumea 3 (1939) 277.

References:

Ooststroom, S.J. van & R.D.Hoogland. 1953. Convolvulaceae in FloraMalesiana 4: 434.

Mon, 2012-06-25 08:11 -- George Staples
Jacquemontia tomentella var. micrantha

Contributors:
Common names and uses:
Akar guluan (Sumatra, E. Coast); ampur (W. Borneo); djelaang (SE. Borneo); pangubao (Sabah).
Author:
S.J. van Ooststroom
Distribution:

Sumatra (E coast), Borneo.

Ecology:

Edges of secondary forests;
forming dense masses over exposed low undergrowth; below 300 m elevation.

Editor:
G. Staples
Flowers:
Flowers smaller. Sepals 3-4 mm long. Corolla 8-10 mm long, red-purple, rose-pink, or white.
Fruits:
Capsule ovoid, mucronate, ca 8 mm high, brown; valves 4, lanceolate, acute, hairy at the top.
Habit:
All parts covered in stellate hairs similar to those in var. tomentella, but of a more silvery greyish colour.
Accepted name/Authority/Place of publication:

Jacquemontia tomentella var. micrantha Hallier f., Bot. Jahrb. 49 (1913)377.

References:

Ooststroom, S.J. van & R.D.Hoogland. 1953. Convolvulaceae in FloraMalesiana 4: 434.

Seeds:
Seeds 4, or often less, brownish black, glabrous.

Mon, 2012-06-25 08:06 -- George Staples
Jacquemontia tomentella

Contributors:
General comments:

All parts of the plant are covered with a dense pubescence consisting of very small scale-like stellate hairs, with 7-13 short rays.

Common names and uses:
Akar kumiet (Sumatra, W. Coast), lehu-lehu (Sumatra, Djambi).
Author:
S.J. van Ooststroom
Distribution:

Borneo (Brunei, Sabah, Sarawak, Kalimantan), Sumatra (W and C parts); a literature report for Vietnam requires confirmation.

Editor:
G. Staples
Flowers:
Sepals about equal in length, 5- 6 mm; two outer ones ovate, obtuse, three inner ones broad-ovate to orbicular, concave, all puberulent outside and with minute glandular dots, glabrous inside. Corolla funnel-shaped, 14-15 mm long or more, pink or white, with 5 densely pilose midpetaline bands. Filaments with dilated, pilose base. Ovary pilose; style pilose near the base; stigmatic lobes thick, nearly globular, wrinkled.
Fruits:
Capsular, more or less cupped by the enclosing calyx, dark brown, 8-11 mm long, glabrous or hairy on the apical part, valves 4-8 or more.
Habit:
A large, woody twiner to 12 m high. Stems terete, angular upwards, the younger parts densely puberulent with minute stellate (7–13-rayed) pale yellowish brown hairs, making the impression of being farinose, adult parts glabrescent, fistulose.
Inflorescences:
Peduncles axillary, puberulent like the stems, shorter or longer than the leaves, corymbosely branched above; flowers in dense umbelliform inflorescences, forming large, more or less unilateral panicles at the end of the branches. Pedicels 3- 6 mm. Lower bracts sometimes foliaceous, upper ones much smaller.
Phylogeny and infrageneric relationships:

KEY TO THE VARIETIES

1. Sepals 5-6 mm long. Corolla ca
15 mm long. Hairs minute, with 7–13 rays.    var. tomentella

1. Sepals 3–4 mm long. Corolla 8–10 mm long.

2. Hairs of two kinds, for the
greater part with 7–13 rays like in var. tomentella, the others with 8–10
rays, one of which is much longer and erect                                                               var. heteroradiata

2. All hairs of the same kind.

3. Hairs with 7–13 rays                                                                        var. micrantha

3. Hairs with 3–4(–5) rays                                                                    var.
tomentosa

Accepted name/Authority/Place of publication:

Jacquemontia tomentella (Miquel) Hallier f., Versl. ‘s Lands Pl.-tuin Btzg. 1895 (1896) 126.

Leaves:
Leaves ovate, 6–14 by 4–10 cm, rounded or slightly cordate at the base, acuminate at the apex, stellately puberulent like the stems, paler beneath than above, glabrescent above; lateral nerves 6-7 on either side of the midrib, prominent beneath; secondary nerves parallel; petiole 2-4½ cm, puberulent like the stems, longitudinally grooved above.
References:

Ooststroom, S.J. van & R.D.Hoogland. 1953. Convolvulaceae in FloraMalesiana 4: 434.

Synonyms:

Lettsomia tomentella Miquel, Fl. Ind. Bat. Suppl. (1861) 560.

Mon, 2012-06-25 07:47 -- George Staples
Jacquemontia zollingeri var. jonkeri

Contributors:
Author:
S.J. van Ooststroom
Distribution:

Lesser Sunda Islands (Timor).

Editor:
G. Staples
Flowers:
Corolla white.
Habit:
Stems, leaf-blades and petioles sparsely pilose to glabrescent; peduncles, pedicels and sepals densely tomentose.
Inflorescences:
Peduncles 2-5 mm long.
Accepted name/Authority/Place of publication:

Jacquemontia zollingeri var. jonkeri Ooststr.,Blumea 3 (1939) 276.

References:

Ooststroom, S.J. van & R.D.Hoogland. 1953. Convolvulaceae in FloraMalesiana 4: 433.

Fri, 2012-06-22 11:35 -- George Staples
Jacquemontia zollingeri

Contributors:
General comments:

This species is closely related to J. paniculata; it might possibly be better to consider it merely as a variety of that species. Both show a great resemblance in habit as well as in the shape and size of the leaves and inflorescences. The main difference is found in the shape of the sepals. Typical J. zollingeri has the same short and dense tomentum as J. paniculata var. tomentosa.

Author:
S.J. van Ooststroom
Distribution:

Indonesia: Java (Mt Baluran in Besuki),Lesser Sunda Islands (Bali, Sumbawa, Timor).

Ecology:

Thickets, from sea-level to ca
30m.

Editor:
G. Staples
Flowers:
Sepals very unequal, the two outer ones broadovate, 7 mm long, cordate or rounded at the base, acute to short-acuminate at the apex, herbaceous, pubescent to tomentose; sepal 3 semi-ovate, 6½ mm long, acute, partly herbaceous, partly scarious, two inner sepals lanceolate, 4½ mm long, acute, hairy near the apex, for the rest glabrous. Corolla funnel-shaped, 9- 11 mm long, pale lilac, shallowly 5-lobed, glabrous. Filaments pubescent at their insertion. Stigmas filiform.
Fruits:
Capsule 8-valved.
Habit:
A herbaceous twiner, lignescent in the basal parts, pubescent to short-tomentose. Stems terete, glabrescent.
Inflorescences:
Peduncles axillary, rather short, 2- 15 mm, pubescent to short-tomentose, cymosely branched, few- to several-flowered. Bracts subulate, the lower to 5 mm long, the upper much shorter.
Infraspecific Characters:

KEY TO THE VARIETIES

1. Stems, leaves andinflorescences pubescent to tomentose var.zollingeri

1. Stems and leaves sparselypilose to glabrescent; inflorescences densely tomentose var. jonkeri

Accepted name/Authority/Place of publication:

Jacquemontia zollingeri(Choisy) Hallier f., Bot. Jahrb. 16 (1893) 543.

Leaves:
Leaves ovate, 3- 5½ by 2-3½ cm, cordate at the base, acute or short-acuminate at the apex, pubescent to short-tomentose; lateral nerves 7-8 on either side of the midrib; petiole 1-1½ cm.
References:

Ooststroom, S.J. van & R.D.Hoogland. 1953. Convolvulaceae in FloraMalesiana 4: 433.

Seeds:
Seeds 4, ca 2 mm long, black, minutely verrucose, glabrous, the angles with a very narrow scarious wing.
Synonyms:

Convolvulus zollingeri Choisy in Zoll.,Syst. Verz. 2 (1854) 130, 132.

Fri, 2012-06-22 11:22 -- George Staples
Jacquemontia paniculata var. philippinensis

Contributors:
Author:
S.J. van Ooststroom
Distribution:

Philippines (Luzon).

Editor:
G. Staples
Flowers:
Differs from var. paniculata by the three outer sepals which are elliptic to elliptic-oblong, obtusish, cuspidate to mucronulate, not distinctly acuminate at the apex, herbaceous; two inner sepals slightly broader, with scarious margins; peduncles filiform and mostly thinner than in var. paniculata.
Habit:
This variety varies from short-tomentose to nearly glabrous.
Accepted name/Authority/Place of publication:

Jacquemontia paniculata var. philippinensis Ooststr.,Blumea 3 (1939) 274.

References:

Ooststroom, S.J. van & R.D.Hoogland. 1953. Convolvulaceae in FloraMalesiana 4: 433.

Fri, 2012-06-22 11:13 -- George Staples
Jacquemontia paniculata var tomentosa

Author:
S.J. van Ooststroom
Contributors:
Distribution:

Northern Australia, Lesser SundaIslands (Sumba, Timor), New Guinea, Philippines (Apo Island in Mindoro Strait).

Ecology:

In grassy fields, on rocks, from sea-level to ca
1200 m.

Editor:
G. Staples
Habit:
Similar to var. paniculata but the whole plant covered with a dense yellowish brown tomentum, finally glabrescent.
Accepted name/Authority/Place of publication:

Jacquemontia paniculata var. tomentosa (Warb.) Ooststr., Fl. Males. 4: 432. 1953.

References:

Ooststroom, S.J. van & R.D.Hoogland. 1953. Convolvulaceae in FloraMalesiana 4: 432–433.

Synonyms:

Convolvulusparviflorus Vahlvar. tomentosus Warb.,Bot. Jahrb. 18 (1894) 207.

Convolvulus multivalvis R.Br., Prod. (1810)483 var. α.

Jacquemontia multivalvis Hallierf., Jahrb. Hamb. Wiss. Anst. 15 (1898) 42.

Jacquemontia paniculata (Burm. f.) Hallier f. var. multivalvis Ooststr., Blumea 3 (1939) 274.

Fri, 2012-06-22 11:02 -- George Staples
Argyreia bifrons

Contributors:
General comments:

The young flowers of the type specimen do not permit a closeexamination of the corolla, stamens, and pistil.

Author:
S.J. van Ooststroom
Distribution:

LesserSunda Islands (Lombok).

Ecology:

Twining
on trees and shrubs; the only specimen known at 5–10 m elevation.

Editor:
G. Staples
Flowers:
Flower sepals unequal, densely pubescent to tomentose on both sides; 2 outer ones oblong, obtuse or slightly emarginate, 8–9 mm long, sepal 3 a little shorter and narrower, obtuse, ca 6.5 mm long, 2 inner sepals broadly elliptic, obtuse, 5 mm long. Corolla funnel-shaped (only young flowers seen), bright violet, the midpetaline bands sericeous, for the rest glabrous. Filaments pilose at the base. Ovary glabrous, 2-celled.
Fruits:
Fruit unknown.
Habit:
Stems twining; young parts densely pubescent to farinose.
Inflorescences:
Inflorescence peduncle much exceeding the petiole, 6–10 cm, angular or sulcate when dry, shortly tomentose, umbellately cymose at the apex, many-flowered. Pedicels (of young flowers) up to 5 mm. Bracts oblong to narrowly spathulate, densely short-pubescent to tomentose on both surfaces, 6 mm long, caducous.
Accepted name/Authority/Place of publication:

Argyreia bifrons Ooststr., Blumea 5: 362. 1943.

Leaves:
Leaves ovate, 5–10 by 3.5–6.5 cm; base truncate to emarginate, apex acute to shortly acuminate; upper surface densely and appressedly gray or olive-green sericeous, lustrous, lower surface densely and shortly crisped-tomentose, paler and dull; midrib and 10–14 lateral nerves on either side prominent beneath; petioles short, 1–2 cm, densely and shortly tomentose.
References:

Ooststroom, S.J. van & R.D. Hoogland, Convolvulaceae inFlora Malesiana 4: 388–512. 1953.

Thu, 2012-06-21 06:13 -- George Staples
Erycibe pedicellata

Contributors:
General comments:

The species resembles Erycibe praecipua Prain ssp. borneensis Hoogland, from which it differs by theglabrous inner side of the corolla, the shape of the anthers (broader than long), and the conical (not funnel-shaped)stigma.

Distribution:

Borneo (Sarawak).

Editor:
G. Staples
Flowers:
Flowers known only from buds. Sepals transverse-oval, 2 by 2½ mm, sparsely strigose outside (hairs with 2 branches, up to 500 µ total length). Corolla 6 mm, tube 2 mm; midpetaline field 2.6 by 1.8 mm, rather densely appressed-hairy (hairs with 2-4 subequal up to 450 µ long branches); lobules 2 by 1.3 mm without distinct venation, entire. Stamens inserted 1.3 mm above the corolla-base; filament 0.3 mm long, ca 0.3 mm broad at the base; anther 0.5 mm long, 0.8 mm broad, 0.4 mm thick, truncate slightly retuse at apex and base. Ovary 1.6 by 1 mm, glabrous; stigma conical, with 5 faint longitudinal ridges.
Fruits:
Fruit unknown.
Habit:
Scandent shrub, younger branches sparsely strigose, older ones with distinct longitudinal cork-ridges.
Inflorescences:
Inflorescences axillary, about fasciculate, up to 2.5 cm, (1-)2-5-flowered. Pedicels 7-15 mm.
Accepted name/Authority/Place of publication:

Erycibe pedicellata Ridl. ex Hoogland, Blumea 7 (1953) 315.

Leaves:
Leaves coriaceous, oblong, 6-12 by 2-4.5 cm, 4-6-nerved; obtuse to rounded, apex often slightly acuminate, base obtuse, glabrous except very sparsely strigose, soon glabrescent, midrib on both sides; midrib slightly sunken, upper side with faintly prominent nerves and hardly distinct venation; underside with faintly prominent nerves and hardly distinct venation. Petiole 7-12 mm.
References:

Ooststroom, S.J. van & R.D. Hoogland, Convolvulaceae inFlora Malesiana 4: 410. 1953.

Wed, 2012-06-20 09:25 -- George Staples

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