Merremia verruculosa

Nomenclature

Accepted name/Authority/Place of publication: 

Merremia verruculosa S. Y. Liu, Bull. Bot. Res., Harbin 7(2): 133. 1987.

Description

Habit: 
Herbs, twining. Stems ca. 2 m, axillary buds and lower stems grayish white pubescent, glabrescent distally.
Leaves: 
Petiole 3–8 mm, pubescent; leaf blade cordate or ovate, 1.5–5 × 1–3.5 cm, adaxial surface sparsely puberulous, base cordate, margin entire, apex short acuminate, mucronulate.
Inflorescences: 
Inflorescences 1–4-flowered; peduncle slender, 1–2.2 cm, whitish pubescent basally; bracts ovate, glabrous. Pedicel 5–7 mm, thicker apically than basally, verruculose.
Flowers: 
Sepals unequal; outer 2 sepals oblong to ovate-oblong, 5–7 mm, abaxial surface verruculose, apex rounded to shallowly emarginate; inner 3 sepals oblong to obovate-oblong, 8–10 mm, apex deeply emarginate or irregularly 2-lobed. Corolla yellow, funnelform, 1.8–2.2 cm, midpetaline bands distinct, (glabrous?). Stamens included, nearly equal; filaments with scale-like fimbriate appendages basally; anthers spirally twisted. Ovary ovoid, glabrous.
Fruits: 
Capsule unknown.
Author: 
Fang R.C. & G. Staples
References: 

Fang R.C., G. Staples, et al. 1995. Convolvulaceae in P. Raven & C.Y. Wu (eds.) Flora of China 16: 271–325.

Biogeography, Ecology and Natural History

Distribution Map: 
Distribution: 

China (Guangxi), Thailand, Laos, Cambodia.

Ecology: 

China: Thickets on
hillsides; ca. 100 m. 

Thailand: In
sunny, open areas in dry deciduous dipterocarp forest or savanna, always on
sand, or over sandstone bedrock; altitude: 150–750 m. 

Phenology: 

Flw. Aug-Oct. Frt. Oct

Author: 
Fang R.C. & G. Staples
References: 

Fang R.C., G. Staples, et al. 1995. Convolvulaceae in P. Raven & C.Y. Wu (eds.) Flora of China 16: 271–325.

Staples, G. 2010. Convolvulaceae. Fl. Thailand 10(3): 330–468.

Other information

Common names and uses: 
you e yu huang cao (Chinese). Chingcho hin (Thai).
Infraspecific Characters: 

Thai plants differ in some respects (narrower leaf blades, more pointed apex to leaves and sepals, larger size) from the description of this Chinese species, based on a single collection from Guangxi province. But the finger-like outgrowths on the outer sepals are unmistakable.

Authorship for webpage

Editor: 
George Staples, Esmond Er
Contributors: 
Classification: 
Merremia verruculosa
Wed, 2011-09-21 03:36 -- Esmond
http://www.gravatar.com/avatar/23fae7ceaa50619ce7ef9c7d4922f7b2.jpg?d=https%3A//convolvulaceae.myspecies.info/sites/all/modules/contrib/gravatar/avatar.png&s=100&r=G

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