138 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 10 



Type. Shrub 0.5-1.5 m, petals magenta, frequent on summit of Sororopan- 

 tepui, Edo. Bolivar, Venezuela, alt. 1800 m, 17 Dec 1952, Bassett Maguire & 

 John J. Wurdack 33936 (holotype US 2342479). 



E. rubra has acute to obtuse leaf blade bases and a glabrous style. E. pullei 

 Gl. differs in its glabrous style and 3-celled ovary. 



Chaetolepis phelpsiae Gleason subsp. chimantensis Wurdack, subsp. nov. 

 Hypanthium centraliter glabrum. 



Type. Shrub 0.1-0.3 m, flowers yellow, frequent along lower escarpment face 

 of Sarven-tepui, Chimanta Massif, Edo. Bolivar, Venezuela, alt. 1900-2050 m, 

 13 Jan 1953, John J. Wurdack 34108 (holotype US 2342483). Paratype. VEN- 

 EZUELA, Edo. Bolivar. Chimanta Massif : Central Section, upper falls of Rio 

 Tirica above Summit Camp, alt. 1940-1950 m, Steyermark & Wurdack 521. 



In the typical subspecies, known only from Cerro Yavi, the hypanthium is 

 moderately and evenly strigose and only three primary leaf veins are evident. 

 The Chimanta population has the hypanthium sparsely strigulose on the apical 

 1/4 and glabrous (or very sparsely strigulose at the extreme base) otherwise; 

 the fourth and fifth (inframarginal) primary leaf nerves are faintly developed. 

 The paratype of C. phelpsiae has ovate leaves like those of the Chimanta collec- 

 tions, rather than the lanceolate to oblong-lanceolate leaves of the Yavi holotype. 

 Probably the closest relative of C. phelpsiae is C. thymifolia Tr. ; that Colombian 

 species has calyx lobes 1.5 X 1.5-2 mm, while the Venezuelan relative has calyx 

 lobes 2.5-3 mm long and 1.5-2 times as long as broad. The interpretation of 

 C. thymifolia is based upon the original description, rather than any type collec- 

 tion study. The material referred to C. thymifolia includes Grant 9651, Apolinar 

 584, and Dawe 320; these collections differ from C. alpina Naud. in the gland- 

 tipped cauline hairs and the hypanthium essentially lacking -resinous glands. 



From the present collections, I can see no reason for differentiating C. citrina 

 Gleason from C. anisandra Naud., Gleason 's distinctions having been blurred by 

 new material. C. anisandra is known from Roraima, Auyan-tepui, and Yutaje 

 (Maguire & Maguire 35322) in the Guayana Highland, and (with completely 

 eglandular hairs) the Sierra Perija in Colombia (Cuatrecasas & Romero 

 Castaneda 25164). 



Macairea chimantensis Wurdack, sp. nov. 



M. asperae N. E. Brown affinis sed ramorum et venulorum primariorum 

 f oliorum subtus pilis i.s. pallidis et floribus minoribus. 



Arbor parva 0.3-0.7 m alta cum ramulis foliis subtus hypanthiisque modice 

 aureo-glandulosis ; rami f oliorum subtus venis primariis inflorescentiisque dense 

 strigulosi vel breviter strigosi pilis basi robustis. Petioli 0.8-1.5 cm ; lamina 

 3.5-6 X 1.5-3 cm oblongo-elliptica apice hebeti-obtusa vel rotundata basi late 

 acuta crasse rigideque coriacea, supra modice tuberculato-aspera, subtus in 

 superficie densissime setulosa (setulis ca. 0.2 mm longis), trinervata nervis 

 primariis lateralibus submarginalibus nervis secundariis supra impressis subtus 

 leviter elevatis ca. 2-2.5 mm inter se distantibus, marginibus incurvatis integris. 

 Panicula 5-9 cm longa multiflora; flores breviter (ad 2 mm) pedicellati. Hypan- 

 thium 2 mm longum modice longo-strigulosum ; calycis tubus 0.3 mm altus, lobis 

 1.5-1.8 mm longis triangularibus vel oblongo-triangularibus acutis. Petala 9- 

 10 x 7-7.5 mm obovata apice late obtusa vel rotundata ciliolata. Stamina sub- 



