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.MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 10 



coriacea (i.s. longitudinaliter striata) uninervata ad margines vix incrassata 

 integra. Flores terminales solitarii vel terni non pedunculati; pedieelli ad 

 anthesim ca. 2 mm longi demura ad 10 mm elongati ad medium bibracteolati 

 (bracteolis 2-3 mm longis lanceolatis) bracteolis hypanthiisque sparse glanduloso- 

 setulosi. Hypanthium 5 mm longum ; calycis lobi ca. 1 mm longi ovati glanduloso- 

 ciliolati. Petala ca. 9 X 4.5 mm elliptica apice acuta apicem versus sparse 

 glanduloso-ciliolata. Stamina isomorphica ; filamenta 7 mm longa glabra ; an- 

 therarum thecae 4 mm longae, connectivo basi 1.8 mm prolongato ventraliter 

 cum appendice bilobulata 0.8 mm longa lataque postice ad basim ipsam cum 

 cauda 1.8 mm longa. Stylus ca. 1 cm exsertus; ovarium apice sparse glanduloso- 

 puberulum. 



Type. Flowers pink, rare in Savanna No. 3, northwest base of Cerro Yapacana, 

 Rio Orinoco, Terr. Amazonas, Venezuela, alt. 125 m, 17 Mar 1953, Bassett 

 Maguire & John J. Wurdack 34516 A (holotype NY). Paratype. Same locality, 

 Maguire, Cowan, d Wurdack 30564 (fruiting). 



While the material cited is very scanty, the vegetative distinctness of P. 

 pusillum from the other congeners is ample for diagnosis. Only a single flower 

 (not dissected) is available on the unicate holotype; the petal and anther dimen- 

 sions were derived from dropped parts of this flower. The other species of 

 Pachyloma have 3-5-nerved leaf blades; the dried leaves of P. pusillum are 

 longitudinally ridged but without any lateral primary veins. 



Acanthella sprucei Hook, f . in Benth. & Hook. Gen. Plant. 1 : 749. 1867. 

 A. montana Gleason. Mem. N. Y. Bot. Gard. 8: 134. 1953. 



The internodal development, leaf, and seed characters cited for differentiation 

 of the Sipapo collections from the lowland species all may be found exactly the 

 same in Esmeralda (topotypical for A. sprucei) and other specimens. Until 

 adequate cumbre flowering material demonstrates conclusive differences, I. shall 

 regard A. montana as a synonym. The species has also been collected (fruiting) 

 on Cerro Yutaje (Maguire & Maguire 35142) and Cerro Guanay (Maguire, 

 Phelps, Hitchcock, & Budowski 31653, 31734) ; its known range is from the Rio 

 Parguaza in Edo. Bolivar (Venezuela) to the Rio Caqueta in Colombia. Students 

 since Cogniaux have followed him in using a Velloso epithet [Acanthella conferta 

 (Veil.) Cogn.] for the Orinoco-Rio Negro species. Patently this is ridiculous, 

 as Velloso 's scanty description of a 5-merous glabrous-stemmed herbaceous 

 Melastoaae from Rio de Janeiro would imply. At present, I am skeptical about 

 any attempts to identify the Velloso names in the Melastomataceae ; in any event 

 Melastoma conferta Veil, (if even Melastomataceae) is probably a microlicioid 

 species, perhaps a Cambessedesia, and certainly not the same as Spruce 3222. 



There also seems to be no real distinction between A. plicata Gleason and 

 A. pulchra Gleason; the young leaves are plicate on Steyermark 58438 (US) and 

 Wurdack & Monachino 41024 as in A. plicata, with older leaves being flat; the 

 seed size is apparently correlated with the capsule age. The prior name is A. 

 pulchra. 



Adelobotrys saxosa Wurdack, sp. nov. 



A. fruticosae Wurdack affinis sed foliis subtus glabratis inflorescentia expansa 

 hypanthio vix striguloso calycis lobis interioribus minoribus rotundatis. 



Arbor gracilis 2-8 m alta; rami robusti primum petiolis inflorescentiis 



