1963] 



BOTANY OF THE GUAYANA HIGHLANDS PART V 



265 



flowered heads on short peduncles, and the relatively numerous lateral nerves 

 of the leaf-blades. 



Schradera cephalophora Griseb. 



This species is apparently endemic to Cuba. It has been treated by previous 

 workers as conspecific with S. capitata Vahl and S. exotica (Gmel.) Standi. 

 [=8. vahlii Steyerm.], but is separated from them by the longer corollas, 

 usually thicker leaf-blades, and scarcely or not at all manifest lateral nerves. 

 The leaf-blades are generally broadly rounded to subcordate at base and broadly 

 rounded at the summit. 



CUBA. Woods, La Brena, Moa; climber, 2-3 m high; 1 Aug 1945, Bros. Leon, 

 Clemente, & Alain 22536 (NY) ; woods, headwaters of Lebisa river, Sierra de 

 Cristal; alt. 500 m; 27 Dec 1955, Bros. Alain & M. Lopez Figueiras 4589 (NY) ; 

 valley of Cayoguan river, Moa ; Jul 1949, Bros. Alain & Clemente 884 (NY) ; 

 headwaters of Arroyo Guaro, Sierra de Nipe ; Jul 1940, Bros. Leon & Alain 

 19133 (NY); woods, La Brena, Moa; June 1945, Bro. Clemente 4598 (NY); 

 thickets, Loma del Gato and vicinity, Cobre range of Sierra Maestra; alt. 900 m; 

 climbing vine; white flowers, sweet-smelling; 11 Jul-14 Aug 1921, Bros. Leon, 

 Clemente, & Pre. M. Roca 9929 (NY) ; El Gato ; 4 Aug 1944, Bro. Alain 248 

 (NY). 



Schradera clusiaefolia (Britton & Standi.) Williams & Cheesman, Fl. Trin. & 

 Tobago 2: 16. 1928. 



Urceolaria clusiaefolia Britton & Standi. Jour. Wash. Acad. Sei. 13: 106. 1923. 

 Urceolaria angustifolia Britton & Standi. Jour. Wash. Acad. Sci. 13: 106. 1923. 

 Schradera angustifolia (Britton & Standi.) Williams & Cheesman, Fl. Trin. & Tobago 2: 

 15. 1928. 



Both Urceolaria clusiaefolia and U. angustifolia were described from non- 

 flowering specimens of plants collected on Mount Tocuche in Trinidad. A recent 

 flowering collection (Steyermark & Agostini 91074) from the tip of the Peninsula 

 de Paria, Venezuela, which is adjacent to Trinidad, is conspecific with the 

 Trinidad plants. Both the narrow-leaved (Urceolaria angustifolia) and broad- 

 leaved (Urceolaria clusiaefolia) types of variations are present on the collections 

 of the Venezuela plant. A comparative evaluation between the Trinidad and 

 Venezuelan specimens leaves no doubt but that both should be referred to the 

 same taxon. The short peduncles, short length of involucre, spathaceous lobed 

 calyx, similar anastomosing of the lateral nerves of the leaf blades, and a fine 

 papillate lower leaf surface with a delicately convolute minutely mosaic-like 

 reticulum of the tertian' venation — these characteristics are shared by the 

 Trinidad and Venezuelan plants. 



Although the fine tertiary venation seems more pronounced, at first examina- 

 tion, in the type collection of Urceolaria angustifolia, it is apparent that it is 

 likewise present on the broader leaves of U. clusiaefolia, as noted in the original 

 description of the latter. The leaf apices in the Venezuelan collection are obtuse, 

 as described for Urceolaria angustifolia, whereas in U. clusiaefolia they are stated 

 to be acute. This difference, however, is not well-marked when the holotype spec- 

 imen of Urceolaria clusiaefolia is compared with the Venezuelan collection. 



An emended description of the present taxon, in view of the recent Ven- 

 ezuelan collection in flower, follows : 



