Argyreia hylophila

Nomenclature

Accepted name/Authority/Place of publication: 

Argyreia hylophila (Kerr) Staples & Traiperm, Thai Forest Bull. (Bot.) 36: 97. 2008.

Synonyms: 

Ipomoea hylophila Kerr, Bull. Misc. Inform. Kew 1941: 17. 1941. TYPE: Thailand. Nakhon Sawan: Raheng, Ban Pa Yang, Kerr 4579 (isotypes A, BK, E, K, TCD).  

Description

Habit: 
Prostrate or twining, from woody rootstock; stems 1–2 m long, innovations puberulent.
Leaves: 
Leaves oblong, elliptic, or elliptic-obovate, 3.5–10 by 1.3–4.5 cm, upper side glabrous, minutely papillose, underside appressed pilose, base rounded or broadly cuneate, apex rounded to truncate, mucronate; lateral veins 7–9 per side; petiole slender, 0.6–2 cm.
Inflorescences: 
Inflorescences axillary, cymose, 1–few-flowered; peduncle 0–0.5 cm; bracts 2, linear, 0.3–0.4 mm, tardily deciduous; pedicels 3–6 mm, thicker apically.
Flowers: 
Flower sepals unequal, outer 2 ovate-elliptic, 9–10 mm, appressed puberulent, concave basally, apex obtuse, undulate, inner ovate, narrower, less hairy; corolla broadly funnelform, c. 5 cm long, purple, glabrous, limb 5-angled; stamens equal, 18–19 mm, filament bases sparsely pilose, anthers oblong, minutely apiculate; pistil included, 25–27 mm long, disc annular, ovary conical, glabrous, style glabrous, jointed above base.
Fruits: 
Berry globose, c. 8–9 mm diam., blackish, accrescent calyx reflexed, sepals 12–13 mm, inside glossy brown, minutely pitted.
Seeds: 
Seeds 2, hemispherical, c. 5–6 mm, black, glabrous.
Author: 
Staples, G. & P. Traiperm.
References: 

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

Biogeography, Ecology and Natural History

Distribution Map: 
Distribution: 

Thailand. Endemic.

Ecology: 

In the undergrowth of deciduous forest and
mixed scrub dipterocarp forest on sandy soil; altitude: c. 100 m. 

Phenology: 

Flowering: November; fruiting: November.

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

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

Other information

General comments: 

General comments. Known from only 2 collections, A. hylophila remains one of the enigmatic species in the Thai flora. There is considerable distance between the two provinces where it has been collected (Nakhon Sawan and Ubon Ratchathani) and it seems surprising that the species, which has large, showy flowers, has not been collected anywhere in between during the past 65 years. 

Authorship for webpage

Editor: 
George Staples, Esmond Er
Contributors: 
Classification: 
Argyreia hylophila
Mon, 2011-09-26 02:01 -- Esmond
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