Merremia hassleriana

Nomenclature

Accepted name/Authority/Place of publication: 

Merremia hassleriana (Chodat) Hassler, Report. Spec. 9: 151. 1911.  

Synonyms: 

Ipomoea hassleriana Chodat in Chodat & Hassler, Bull. Herb. Boissier ser. 2, 5: 693. 1905. TYPE. Paraguay. Pr. Igatimi, Hassler 4692 (syntype G); pr. flumen Carimbatay, Hassler 4539 (syntype G). 

Ipomoea hassleriana forma sinuato-lobata Chodat in Chodat & Hassler, Bull. Herb. Boissier ser. 2, 5: 693. 1905. TYPE. Paraguay. pr. Igatimi, Hassler 4692 (holotype G). 

Ipomoea hassleriana forma mucronulato-denticulata Chodat in Chodat & Hassler, Bull. Herb. Boissier ser. 2, 5: 693. 1905. TYPE. Paraguay. pr. flum. Carimbatay, Hassler 4539 (holotype G; isotype GH). 

Merremia hassleriana var. robusta Hassler, Report. Spec. 9: 151. 1911. TYPE. Paraguay. In arenosis pr. Yhu, Nov, Hassler 9690 (holotype G; isotypes, GH, NY, UC).

Description

Habit: 
Prostrate herb to 1 meter long, stems cylindrical, longitudinally striate, hirsute with yellowish stellate trichomes, to 2 mm in diameter.
Leaves: 
Petioles stout, smooth, with a ventral sulcus, stellate pubescent, 3-17 mm long. Leaves elliptic-ovate, basally obtuse to truncate, margins simple to undulate or incised, apically obtuse to rounded, mucronate, nerves impressed above and prominent below, densely stellate pubescent on both surfaces, 25-75 mm long and 15-20 mm wide.
Inflorescences: 
Inflorescence a dichasium or flowers solitary; peduncles slender, stellate pubescent, 15-68 mm long; bracts two, subequal or unequal, foliaceous, linear, lanceolate, rhombic to hastate in shape, densely stellate pubescent, the smaller 4-14 mm long and 0.5-4 mm wide, the larger 5-30 mm long and 0.5-13 mm wide; pedicels short, clavate, smooth, densely stellate pubescent, 9-21 mm long;
Flowers: 
sepals equal, lanceolate, apices long acuminate, the outer two covered entirely in stellate pubescence, the inner three with pubescence only on the basal portion, 11-18 mm long and 3-5 mm wide; corolla campanulate-funnelform, subglabrous, the pubescence confined to the lower outer portion of the corolla tube, white, 27-42 mm long and 18-45 mm wide; stamens included within the corolla tube, longer than the stigma and style, filaments not seen, anthers spirally dehiscent; pollen three colpate, smooth; ovary not seen, style filiform glabrous, longer than the androecium, stigma biglobose.
Pollen: 
Pollen three colpate, smooth.
Fruits: 
Fruit and seeds not seen, reported to be a subglobose capsule surrounded by the enlarged calyx.
Seeds: 
Fruit and seeds not seen
Author: 
Staples, G.W. & D.F. Austin.
References: 

Austin, D. F. & G. W. Staples. Convolvulaceae in Flora Neotropica [unpublished data]. 

Biogeography, Ecology and Natural History

Distribution Map: 
Distribution: 

Known from Argentina and Paraguay.

Author: 
Staples, G.W. & D.F. Austin.
References: 

Austin, D. F. & G. W. Staples. Convolvulaceae in Flora Neotropica [unpublished data]. 

Authorship for webpage

Editor: 
George Staples, Esmond Er
Contributors: 
Classification: 
Merremia hassleriana
Tue, 2011-10-04 09:14 -- 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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