Cordisepalum phalanthopetalum
Nomenclature
Accepted name/Authority/Place of publication:
Cordisepalum phalanthopetalum Staples, Blumea 51: 425. 2006.
TYPE: Thailand. Kanchanaburi: along track from Huay Bankan to Si Sawat, 14°50’ N, 98°50’ E, 15 Nov. 1971, C.F. Van Beusekom, C. Phengklai, R. Geesink & B. Wongwan 3791 (holotype: BKF; isotypes: BISH, C, K, KYO, L, MO, P).
Description
Habit:
Liana; vegetative parts tawny to brownish hairy; lower stem woody, glabrate; branches 4–5 mm diam., smooth to striate, fistulose when dry, pubescent; younger stems to 3 mm diam., herbaceous, velutinous. Indumentum composed of hispid, simple, swollen-based hairs, ca. 1.5 mm long, and shorter, 2-armed, erect, hairs.
Leaves:
Leaf petiole 2–2.5 cm long; blade broadly ovate-cordate, 9.5–14.2 by 5.4–9 cm, base cordate, apex apiculate to shortly caudate, adaxially castaneous, velutinous, abaxially ± densely tawny-fulvous velutinous; venation with 3 basal pairs and 2 distal pairs of secondary veins.
Inflorescences:
Inflorescence thyrsiform: a congested compound raceme, 40–51 cm long; lower bracts foliaceous, petiolate, petiole terete, (9–)15–25 mm long, blade ovate-cordate, 5.4–8.2 by 3.4–4.4 cm; upper bracts diminishing in size, petiole 1–4 mm long, blade ovate to elliptic-fusiform, 4–7 by 2–5 mm; uppermost bracts sessile, subulate-lanceolate, 1–2 mm long; pedicels filiform, < 1 mm long; bracteoles 3.
Flowers:
Flower buds broadly ellipsoid, apex rounded. Sepals ca. 1 mm long, outer 3 lanceolate to narrowly ovate, inner 2 linear to narrowly oblong, bases truncate, margins entire, apex obtuse to acute and slightly cucullate, outside densely velutinous, inside apex pilose-velutinous, otherwise glabrous. Corolla yellow, tube ca. 1 mm long, limb 3(–4) mm diam., lobes broadly ovate to obovate, ca. 1 by 1 mm, apex obtuse to acute, outside velutinous, inside glabrous. Stamens ca. 1 mm long, just protruding from corolla tube; filaments pilose basally, glabrous above; anthers broadly ellipsoid, extrorse, white; pollen 3-colpate, oblate spheroidal, ca. 9 m by 10–12 m, surface finely granulate, pilate multiangulate within the colpi. Pistil ca. 1.5 mm long, equal in length to calyx, just reaching mouth of corolla tube; ovary broadly ovoid, pale tan, glabrous; ovules 5; style absent; stigma sessile, biglobose, green drying to black.
Pollen:
Pollen 3-colpate, oblate spheroidal, ca. 9 micrometer by 10–12 micrometer, surface finely granulate, pilate multiangulate within the colpi.
Fruits:
Fruiting calyx, utricle
Seeds:
seeds not seen.
References:
Staples, G.W. 2006. Blumea 51: 403–491.
Biogeography, Ecology and Natural History
Distribution Map:
Distribution:
Thailand, Myanmar. (Map)
Ecology:
Disturbed forest
on limestone between 150–450 m elev.
Phenology:
Months |
Jan |
Feb |
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Oct |
Nov |
Dec |
Flowering specimens |
1 |
1 |
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Fruiting specimens |
References:
Staples, G.W. 2006. Blumea 51: 403–491.
Other information
Authorship for webpage
Editor:
George Staples, Esmond Er
Contributors:
Despite intensive effort in 2009, this species could not be located in the type locality and its status remains unknown.