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BOTANY OF THE GUAYANA HIGHLANDS PART V 



183 



1-1.3 mm longae persistentes. Hypanthium 2 mm longum modice (praecipue 

 basim versus) setulosum pilis ca. 0.8-1 mm longis sparse barbellatis; calycis lobi 

 interiores ca. 0.8 mm longi ovato-oblongi, dentibus exterioribus lineari-setaceis 

 sparse setuliferis lobos interiores ca. 2 mm superantibus. Petala ca. 2.3 X 1-1.2 

 mm oblongo-obovata apice rotundata glabra. Filamenta 1.5 mm longa; anthe- 

 rarum thecae ca. 2 mm longae lineari-oblongae connectivo ventraliter exappendi- 

 culato dorsaliter cum appendice hebeti 0.1-0.2 mm longa. Stylus ca. 4X 0.15 mm; 

 stigma truncatum. Fructus baccatus ca. 3 mm diam sphaericus. 



Type. Climber in forest, Mt. Kanaima, Potaro District, British Guiana, alt. 

 ca. 450 m, 19 Aug 1959, B. A. Whitton 104 (holotype K). 



The photograph of C. repens (Macbride 36352) shows the leaf surfaces and 

 serrulate margins with hairs 1-1.5 mm long and with no development of prom- 

 inently elevated lower surface venules. The one mature flower of the Whitton 

 specimen was not dissected, all measurements being taken dry. The geographic 

 pairing of Clidemia species between the Pacific coast of Colombia and the Guianas 

 also occurs in C. ehocoensis Wurdack — C. conglomerate! DC. The general vegeta- 

 tive aspect of C. son (he it Ji ii is much like that of the two radicant cumbre Leanclra 

 species. Commemoration of Sandwith's Guianan research is especially pleasurable 

 for one who has been aided both by much personal correspondence and by the 

 example furnished of meticulous taxonomy. 



Clidemia pyenaster Tut in subsp. robusta Wurdack. subsp. nov. 



Foliorum lamina usque ad 8—1 X 4-5 em supra primum modice brevistrigosa ; 

 calycis lobi interiores 1.7 x 1.3 mm oblongi apice rotundati. 



Type. Shrub 1.5 m, young fruit mealy, pinkish, rare in scrub savanna, 

 Samwarakna-tipu (Iloli-tipu), Kamarang River — Wenamu Trail, Pakaraima 

 Mountains, British Guiana, alt. 1100 m, 10 Nov 1951, Bassett Maguire & D. B. 

 Fanshawe 32545 (holotype US 2343465). 



In the typical subspecies, the largest leaves are 3-3.3 cm wide and only very 

 sparsely strigulose above when young; the triangular usually acute inner calyx 

 lobes are only 1-1.2 mm long. Within the collections of subsp. pyenaster studied 

 by me, about 20 per cent of the flowers were 5-merous. In subsp. robusta, only 7 

 of 28 observable flowers were 4-merous, the remainder 5-merous. The ovary of 

 C. pyenaster is 3-celled, with the apex very minutely glandular-setulose as well 

 as very sparsely to moderately stellulate-puberulous (and not glabrous as cited 

 in the original description) ; the torus is sparsely glandular-setulose. 



Clidemia morichensis Wurdack, sp. nov. 



C. involueratae DC. affinis sed foliis rigidiusculis 5-7-nervatis basi vix cordatis 

 bracteis ovatis. 



Frutex 1 m ; rami teretes petiolis pedunculisque dense setulosi pilis ca. 1 mm 

 Longis plerumque glanduliferis. Petioli 7-18 mm; lamina 5-11 X 2.5-5.5 cm 

 anguste ovata apice anguste acuta basi vix (2-4 mm) cordata rigidiuscula, supra 

 modice strigulosa pilis glanduliferis sparse intermixtis, subtus in venis dense et 

 in superfieie modice vel sparse setulosa pilis glanduliferis sparse intermixtis, 

 5-7-nervata nervis secundariis plerumque 2-4 mm inter se distantibus tertiariis 

 vix inconspicuis, ad margines denticulata et glanduloso-ciliolata. Inflorescentia 

 capituliformis 1-2 cm pedunculata involucrato-bracteata capitulo multifloro ; 

 bracteae exteriores duae 8-10 X 5-7 mm ovatae acutae modice gracili-setulosae 

 pilis p.p. glanduliferis, interiores 4-6 vix minores ; flores 5-meri. Hypanthium 



