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Project Name Data (Last Modified On 2/7/2013)
 

Flora Data (Last Modified On 2/7/2013)
Genus CLEMATIS L.
PlaceOfPublication Sp. P1. 543. 1753.
Synonym Atragene L. I.c. 1753. Muralta Adans. Fam. 2: 460. 1763. Viticella Dill. ex Moench, Meth. 296. 1794. Naravelia DC. Syst. 1: 167. 1818. Viorna Reichb. Handb. 227. 1837. Cheiropsis Spach, Hist. Veg. Phan. 7: 260. 1839. Meclatis Spach, loc. cit. 272. 1839. Sieboldia Hoffmgg. ex Heynh. Nom. 2: 665. 1846.
Description Dioecious or polygamo-monoecious, lignescent vines, climbing by means of foliar tendrils (in Central America). Leaves opposite, exstipulate, ternately, pin- nately or biternately compound, the leaflets entire to coarsely dentate, often asymmetrical, 1- to 5-plinerved, glabrous to densely sericeous, the rhachis usually pubescent, often twining. Inflorescences of cymes or umbels racemosely disposed along the bracteate, often elongate main axis, unisexual or polygamous; sepals 4-5, valvate, white, greenish or purplish, often petaloid; stamens numerous, sepa- rate, the filaments flattened and elongate, the anthers basifixed, 2-celled, longi- tudinally dehiscent; carpels numerous, separate, the styles comose. Fruit a dry arcuate-ellipsoid achene terminated by the elongate indurate, hirsute style, the ovule pendulous on the dorsal raphe.
Habit vines
Note Several ornamentals exist in this widespread temperate and tropical genus of both hemispheres. Only the monographer could say how many species there are; the first volume of the Index Kewensis devoted seven and a half columns to the genus. Extreme variability in the leaves, indument and sexuality have resulted in a rapid increment of named species, many of which, at best, deserve only formal status. The South American species recently have been treated by Lour- teig (in Darwiniana 9: 397. 1951, and in Mem. Soc. Cien. Nat. La Salle 16: 19. 1956). Three elements occur in Panama, and I am handling them in the status which I believe would have been assigned them by Lourteig, although the dif- ferences between them are by no means constant.
Key a. Leaflets densely sericeous, coarsely dentate with 2-6 teeth per side, often basally cordate ..................................1. C. HAENKEANA aa. Leaflets glabrescent, entire or with fewer teeth, basally rounded or truncate ..2. C. DIOICA
 
 
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