Vol. 9, No. 3 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



May 23, 1957 



BOTANY OF THE PHELPS' VENEZUELAN GUAYANA EXPEDITIONS— n" 

 UAIPAN-TEPUI, ESTADO BOLIVAR 



Bassett Maguire and John J. Wurdack 



Part II of our reports on the Phelps' Guayana expeditions deals with some of 

 the plants collected on Uaipan-tepuf by Kathleen D. Phelps and Charles B. 

 Hitchcock during January 15-February 15, 1948. 



Numbers indicating the cited exsiccatae are those of Phelps and Hitchcock 

 unless otherwise indicated. 



VELLOZIACEAE 



Barbacenis uaipanensis Maguire, sp. nov. (Fig. 117.) 



Caudex simplex erectus, 3-5 dm longus ca. 1.5 cm crassus, vaginis laevibus 

 tecte adpressis imbricatis persistentibus; laminis 3-5 cm longis rosulatis, deorsum 

 5-7 mm latis, anguste lineari-lanceolatis acutissimis conspicue 5-7-nerviis, 

 subtus inter nervos glanduloso-punctatis; floribus terminalibus numerosis 25 

 vel pluribus, sessilibus vel subsessilibus; bracteis foliaribus 2-3 cm. longis, 

 chartaceis prominenter 1 5-20-nerviis, floribus plus-minus longioribus; segmentis 

 perianthii anguste lanceolatis, 8-10 mm longis, tubo 8-10 mm longo; staminibus 

 6; ovario ca. 10 mm longo 3 mm crasso, obscure trigono glabro, intus nigro; 

 seminibus 2-3 mm longis, fusiformibus albidis medio affixis. 



TYPE: erect, post-flowering, locally common, occurring to the exclusion of 

 other flowering plants, embedded in moss and wet humus, windy exposure, summit 

 of Uaipan-tepui, Bolivar, Venezuela, at 1900 m alt., January 27, 1948, 388 (NY). 



Our plant, because of its six stamens, is referred to the genus Barbacenia. 

 This is in accord with the distinction made by Pax 33 placing the members of 

 this remarkable family with 6 stamens in the genus Barbacenia, and those with 

 stamens more than 6 (usually 15, 18, 24, or 30) in the genus Vellozia; and is 

 further in accord with the treatment of Henrard 34 , vigorous student of American 

 Velloziaceae. 



Barbacenia, as so determined, is apparently otherwise unrecorded for the 

 Guayana Highland. Its closest relative in this area is the widespread Vellozia 

 alexandrinae (Schomb.) Goeth & Henrard, characteristic of submontane savannas 

 and montane slopes, particularly as concomitant with or sequential to fire. 



ROSACEAE 



Licania hitchcockii Maguire, sp. nov. (Fig. 118.) 



Arbor parva; ramulis teretis tenuibus puberulis; foliis 4-5 cm longis 2.5-3.0 

 cm latis (superioribus minoribus 1.0-2.5 cm longis 0.5-1.5 cm latis), elliptico- 

 ovatis vel elliptico-obovatis breviter lateque acuminatis acute subcoriaceis vel 

 subchartaceis, supra glabris pallidis nitidisque venis impresso-prominulis, subtus 



32 Part I of this series was issued in Bol. Soc. Venez. Ci. Nat. 14: 1-15 (1951). 

 Foot-notes and figures in this paper are numbered consecutively with those of "Anat- 

 omy of Guayana Mutisieae" (Mem. N. Y. Bot. Gard. 9:441-476). 

 "E. & P. Nat. Pfl. ed. 2, 15a: 433. 1930 

 34 Blumea 2: 339-384. 1937. 



477 



