1957] 



THE BOTANY OF THE GUAYANA HIGHLAND— PART II 



359 



aequantia, episepalica longiora, e quibus tria ventralia glabra, caetera lanato- 

 pubescentia, intersepalica pubescentia. Discus carnosus, crassus, deflexus. 

 Ovarium (± 2.5 mm) semiovoideo-asymmetricum, 3 - ovulatum, glabrum in stylum 

 attenuatum. Stylus tenuis, glaber, inclusus (± 4.5 mm). Stigma subcapitatum, 

 papillosum. Semina 3, magna (±3 mm), suborbicularia aut subellipsoidea, crassa, 

 carunculata, foveolata. 



TYPUS: VENEZUELA: Edo. Bolivar, Gran Sabana, headwaters of Rio A pong uao, 

 alt. 1200 m, 27-28 March 1952, Bassett Maguire 33644 (NY). 



Additional collections: VENEZUELA: Rio Caroni, playas arenosas del raudal Kurukuya, 

 alt. 740 m, F. Cardona 1783, 9 X 1946 (US). 



In the system of Koehne for this genus, the present new species must be 

 placed in section Trispermum, series 3, immediately after C. flava Sprengel, from 

 which it differs in the pubescence and the shape of its leaves. 



The name, derived from the Greek, refers to the malpighiaceous hairs whose 

 branches are very unequal in length. 



BIGNONIACEAE 16 



This is my twenty-first contribution to the study of the tropical American 

 representatives of this family. For references to the others, see Kew Bull. 1954: 

 597 (March 1955). In this contribution, the taxa are arranged alphabetically, both 

 by genera and species. 



Anemopaegma parkeri Sprague. 



VENEZUELAN-BRAZILIAN frontier: between Estado Bolivar (Venezuela) and 

 Territorio do Rio Branco (Brazil): shrub 1-2 m tall with cream- white flowers, on 

 rocky knoll on savanna 5 km south-east of Serra Sabang, 720 m, fl. Dec. 1954, 

 B. Maguire & C. K. Maguire 40282. Amazonian Brazil, Guiana. Not recorded for 

 Venezuela. This is a habitat form with erect growth. 



Anemopaegma robustum K. Schum. 



VENEZUELA: Territorio de Amazonas: woody vine with sulphur-yellow 

 flowers, along uppermost Rio Yatua above mouth of Rio Yacibo, 100-140 m, fl. 

 Jan. 1954, B. Maguire, J. J. Wurdack & G. S. Bunting 37440. British Guiana. 

 First record for Venezuela. 



Arrabidaea brachypoda (DC.) Bur. 



A. platyphylla (Cham.) Bur. et K. Schum., non A. platyphylla DC. 



VENEZUELA: Bolivar: shrub 0.5-1 m, with pink fls., infrequent in lower 

 slope forest along Fundacion Road, 325-415 m, Feb. 27th 1953, /. /. Wurdack 

 34428. Without data, comm. 1926, Pittier 12048. These are the first specimens I 

 have seen from Venezuela. This variable species has a wide distribution in South 

 America, from British Guiana to Brazil, Paraguay, Amazonian Bolivia, and Peru. 



Arrabidaea nigrescens Sandw. 



VENEZUELA: Territorio de Amazonas: woody vine on ground, fls. pink, at 

 edge of Sabanita 1 Ion east of Maroa, Rio Guainia, 125 m, April 16th 1953, B. 

 Maguire & J. J. Wurdack 35703. 



A form with old, thick, glabrescent leaflets, shining and sub-bullate above, 

 and with relatively few forked hairs on the main nerves beneath. A very similar 



"By N. Y. Sandwith. 



