56 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



I 



[VOL. 10 



on the sandstone plateaus of the Alto Orinoco drainage, viz., Cerros Duida, 

 Paru and Sipapo, and to the east in the Pakaraima savannas of British Guiana 

 and adjaecnt Venezuela, in the drainage of the Kamarang and Mazaruni Rivers. 



Key to the Subspecies of Clusia pusilla 



1. Leaves thickly coriaceous, cuneate or euneate-obovate, (4) 5-7 (9) cm long, 3-5 

 (6.5) cm wide, broadly rounded or subtruncate at the apex, broadly cuneate at the 

 base, the petiole 1-2 (3) mm long, the latex canals plainly visible; fruit oblong, 

 2.0-4.0 cm long, 1.8-2.0 cm broad; drainage of the Carom. subsp. pusilla. 



1. Leaves oblanceolate, the apex rounded or obtuse, the base narrowly cuneate, the latex 

 canals obscure or not visible. 

 2. Leaves (6) 8-10 (12) cm long, 3-5 (6) cm broad; fruit depressed-globose, globose, 

 or oblong, 2-3 cm long, 1.5-2.2 cm broad; styles free to the base; drainage of the 

 Mazaruni. subsp. pakaraimar. 



2. Leaves 10-15 (18) cm long, 6-8 (11) cm broad; styles tending to coalesce laterally 

 near the base; fruit narrowly oblong, 3-5 cm long, 1.5-2.0 cm broad; drainage of 

 the Alto Orinoco. subsp. orinoeensis. 



Clusia pusilla subsp. pusilla. 



C. pusilla Steyermark, Fieldiana Bot. 28: 390. 1952. 



This lovely rounded, densely branched shrub or small tree reaches a heighl 

 of 4 m } but more often is half or less that high. It is a conspicuous plant, gen- 

 erally distributed over the scrub savanna of the Gran Sabana and of Cerro 

 Guaiquinima on the Rio Paragua, where its symmetrical form, dark lustrous 

 foliage, and numerous large fragrant white flowers make it, the name not with- 

 standing, one of the most attractive plants of the region. 



Type: dry rocky thickets, Gran Sabana, vie. Kavanayen, at 1220 m alt.. Oct 

 26, 1944, Edo. Bolivar, Venezuela, Steyermark 59396. 



Specimens examined: VENEZUELA: Edo. Bolivar, Gran Sabana: Kavanayen, Oct 2(i, 

 1944, Steyermark 59396 (isotype NY); Kavanayen, Maguire 33724$ ; headwaters of .the 

 Kamarang, vie. Ilu-tepui, Maguire 33265 9, 33266$ ; Cerro Guaiquinima, Rio Paragua, 1600- 

 2000 m alt., Maguire 32894 9 , 32993 9 , 33009 9 , 33011 9 , 33065 9 , 32923 $ , 32994 $ , 33010 $ , 

 32837$, 32924$. 



Clusia pusilla subsp. pakaraimae Maguire, subsp. nov. 



Petioli 2-5 mm longi, late alati; laminis oblanceolatis (6) 8-10 (12) cm 

 longis, 3-5 (6) cm latis, basi anguste cuneata; fructibus depresso-globosis vel 

 oblongis, £-3 cm longis, 1.5-2.2 cm latis; stylis ad basim liberis. 



Type : dwarfed tree 0.5-2.0 m high, frequent, Imbaimadai Savannas, at 1200 

 m alt., Oct 24, 1951, Maguire & Fanshawe 32231 9 (holotype NY). 



Paratypes: BRITISH GUIANA: Pakaraima Mountains, Mazaruni River, Imbaimadai 

 Savannas : Maguire # Fanshawe 32197 9 , 32289 9 , 32301 9 , 32313 9 , 82314 9 , 32309 $ , 82230 $ ; 

 Kamarang River, Holitipu savannas: Maguire $ Fanshawe 32515 9, 32515 A 9 , 32558 9, 

 32514$. VENEZUELA: Gran Sabana, Kamarang Headwaters: Maguire 33265 9, 33266$. 



Clusia pusilla subsp. orinocensis Maguire, subsp. nov. 



Petioli 2-4 mm longi late alati; laminis 10-15 (18) cm longis, 6-8 (11) cm 

 latis, basi cuneata; fructibus anguste oblongis, 3-5 cm longis, 1.5-2.0 cm latis; 

 stylis ad basim %-% connatis. 



Type : small tree with clear scanty latex, occasional, mixed montane wood- 

 land, Intermediate Camp at 600 m alt., Feb 2, 1948, Cerro Sipapo, Maguire & 

 Politi 28724 9 (holotype NY). 



