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Cordisepalum thorelii

Nomenclature

Accepted name/Authority/Place of publication: 

Cordisepalum thorelii (Gagnep.) Verdc., Kew Bull. 26: 138. 1971. 

Synonyms: 

Cardiochlamys thorelii Gagnep., Notul. Syst. (Paris) 3: 136. 1915. TYPE: Laos. Bassac, 1866–1868,  Thorel 2625 (holotype: P, photo K; isotype: P, photo K). 

Description

Habit: 
Liana to 4–6(–8) m long; vegetative parts fulvous to ferruginous; older stems 5-8 mm diam., smooth to slightly striate, dark brownish black, ± puberulous to subglabrous, pith solid; younger stems 1–2 mm diam., herbaceous, terete, tan to brownish, velutinous. Indumentum hairs 2-armed; arms wavy, ± appressed on axial parts, arms erect or ascending on laminar parts.
Leaves: 
Leaf petiole 17–43 by <1–2 mm, ± velutinous; blade broadly ovate to attenuate-ovate, 8–11.5 by 4.3–7.6 cm, base subcordate, sinus broad and shallow, apex attenuate-acuminate to subcaudate, adaxially darker, ± velutinous, abaxially grayish, tawny, or rufous, densely woolly; venation with 2 basal pairs and 1 or 2 distal pairs of secondary veins.
Inflorescences: 
Inflorescence lax, a simple or compound raceme 25–50 cm long.; lower bracts petiolate, petioles (2–)5–13(–21) mm long, blades broadly ovate, 21–31 by 13–24 mm; upper bracts sessile, ovate, 12–19 by 6–9 mm, diminishing to small scales; pedicels filiform, 3–5 mm, increasing to 8–10(–13) mm in fruit; bracteoles 3, <1 mm long.
Flowers: 
Flowers fragrant; buds obovoid or ellipsoid, widest above calyx, apex rounded. Sepals naviculate, ca. 2 by <1 mm; outer 3 obpandurate to narrowly ovate, inner 2 narrowly elliptic-oblong, bases truncate, margins entire, apex acute, outside densely velutinous, inside pilose apically, otherwise glabrous. Corolla cream to pale yellowish; tube 1–2 mm long, glabrous inside and out; limb (5–)7–11 mm diam.; lobes ovate, 3.5–5 by 1.5–3 mm, apex acute to acuminate, both sides densely velutinous-woolly. Stamens < 2 mm long, just protruding from corolla tube; filaments glabrous; anthers broadly ellipsoid, introrse, whitish; pollen 3-colpate, oblate spheroidal, ca. 10 micrometer by 11–14 micrometer, surface psilate or finely granulate, with pilate multiangulate outgrowths within colpi. Pistil ca. 2 mm long, just exceeding calyx, stigma protruding from corolla tube; ovary ovoid, glabrous; ovules 4; style short, terete; stigma biglobose.
Pollen: 
Pollen 3-colpate, oblate spheroidal, ca. 10 micrometer by 11–14 micrometer, surface psilate or finely granulate, with pilate multiangulate outgrowths within colpi.
Fruits: 
Fruiting calyx clasping utricle; sepals markedly unequal; outer 3 sepals broad ovate-cordate to suborbicular, 21–28(–33) by 19–26(–28) mm, base cordate, lobes approaching or overlapping, margins entire, free, apex emarginate, mucronulate, third sepal folded back on itself along midvein (in dried material); inner 2 sepals linear-spathulate, falcate, 5–7 by <1–2 mm; all sepals chartaceous, stramineous to tan, opaque, reticulate, both sides sparsely pilose. Utricle ellipsoid-fusiform, apiculate, 6–7 by 3– 4.5 mm, borne on a columnar stalk ca. 2 mm long, chartaceous, brownish, smooth or shallowly furrowed, tawny to rufous velutinous.
Seeds: 
Seed broadly ellipsoid, 4 by 3.5 mm, dark reddish-brown; hilum basal, ca. 1 mm diam.
Author: 
G. Staples
References: 

Staples, G.W. 2006. Blumea 51: 403–491.

Biogeography, Ecology and Natural History

Distribution Map: 
Distribution: 

Thailand, Laos, Vietnam; probably also in Cambodia.  (Map).  

Ecology: 

Evergreen forests,
mixed/disturbed and open hardwood forests, often in clearings or along the
margins; seemingly always on limestone. From 25–1200 m elevation. 

Phenology: 

Months

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Flowering specimens

1

1

1

4

5

Fruiting specimens

1

Author: 
G. Staples
References: 

Staples, G.W. 2006. Blumea 51: 403–491.

Other information

Common names and uses: 
Rahet khati dong (Thailand, Nakhon Ratchasima), re cai (Vietnam, Moï dialect), ma coi (Vietnam, Moï dialect).

Authorship for webpage

Editor: 
George Staples, Esmond Er
Contributors: 
Classification: 
Fri, 2011-09-23 02:13 -- Esmond
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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith