1963] 



BOTANY OF THE GUAYAXA HIGHLANDS ] 



PART V 



231 



Y ENEZUELA. Amazonas : Cerro de la Neblina ; frequent, trail escarpment ; 

 alt. 1800-1900 m; shrub to 2 m ; corolla greenish; 16 Nov 1957, B. Maguire, 

 Wurdack, Keith, & C. K. Maguire 42120 (holotype NY) ; Cerro de la Neblina; 

 escarpment edge above Canon Grande east of Cumbre Camp ; locally abundant ; 

 alt. 1800 m; shrub 0.3-1 m; flowers yellow-green; 22 Nov 1957, B. Maguire, 

 Wurdack, Keith, & C. K. Maguire 42171 (paratype NY) ; Cerro de la Neblina; 

 frequent in open areas 6-8 km north of Cumbre Camp ; alt. 1800-1900 m ; 10 Jan 

 1954, Maguire, Wurdack, d- Bunting 37175 (paratype NY) ; Cerro de la Neblina; 

 uppermost escarpment slopes south of Camp 3 ; alt. 1700 m ; 27 Dec 1953, Maguire, 

 Wurdack, & Bunting 36960 (paratype NY); Cerro de la Neblina; occasional 

 along west escarpment edge, summit ; alt. 1700-2000 in ; 30 Dec 1953, Maguire, 

 Wurdack, & Bunting 37011-A (NY) . 



Neblinathamnus glabratus Steyermark, sp. now 



Frutex, ramulis novellis dense hispidulis; foliis 3-verticillatis petiolatis, 

 petiolis 2-3 mm longis hispidulis; laminis coriaceis revolutis anguste oblongis 

 vel lineari-oblongis apice rotundatis basin versus cuneatim angustatis 13-33 mm 

 longis 5-11 mm latis, supra glabris subtns tessellatis areolis foveolatis pallido- 

 viridibus fere glabris papillis albidis paucis instructis, costa media supra 

 sulcata subtus adprosso-hispidula, nervis lateralibus utroque latere 5-6 supra 

 sulcatis subtus impn ssis adpresso-hispidulis ; floribus in axillis superioribus 

 geminis, pedicellis 2-4 mm longis dense hirtellis; hypanthio oblongo-obovoideo 

 2-2.5. mm longo 1.75-2 mm lato extus dense hirtello, calycis laciniis lineari- 

 laneeolatis acutis 6-7 mm longis 0.7-1 mm latis hispidulo-ciliolatis aliter glabris; 

 corolla hypocrateriformi 21 mm longa, tubo rubro (teste Maguire, Wurdack, dc 

 /hutting) gracili 14-15 mm longo in parte inferiore tertia 1.75-2 mm lato fauce 

 3 mm lata extus glabro intus in parte superiore 3 mm longa pubescenti aliter 

 glabro, lobis 5 viridi-luteis (teste Maguire, Wurdack, d' Bunting) late ovato- 

 oblongis apice rotundatis (i mm longis 5 mm latis; antheris 5 linearibus 2.25-2.5 

 mm longis 0.2 mm latis ; filamentis 1-1.5 mm longis glabris; stylo filiformi 13 mm 

 longo glabro ; stigmatibus oblanceolato-oblongis 2 mm longis ; capsulis 4.5-5 mm 

 Longis 4 mm latis extus hispidulis. 



VENEZUELA. Amazonas: Cerro de la Neblina, summit; occasional along 

 west escarpment edge; alt. 1700-2000 m; shrub; corolla-lobes lime-yellow; tube 

 red; fruit red with green hypanthium ; 30 Dec 1953, Maguire, Wurdack, d* Bunt- 

 ing '17011 in part (holotype NY). 



The holotype collection was mixed with a portion of the other taxon described 

 above. It differs from N. ar gyre us in having the corolla-tube completely glabrous 

 externally, in the narrowly oblong or linear-oblong elongate leaf -blades whose 

 lower pale green surface lacks the whitened masses of short hairs characteristic 

 of N. argyreus, instead the depressed areoles are covered with a cellular reticula- 

 tion, in the more prominently hispidulous surface of nerves, midrib, and veinlets 

 of the lower leaf surface, and in the corolla color, which is greenish to greenish- 

 yellow in N. argyreus, whereas in N. glabratus the corolla-tube is red and the 

 corolla-lobes are "lime-yellow. ' ' The flowers of N. glabratus occur in pairs at 

 the summit or uppermost axils of the shoots, whereas in N. argyreus the flowers 

 are predominantly solitary, although also occurring in pairs. 



That there are pronounced differences between N. argyreus and N. glabratus 

 is apparent. Although it is quite possible that additional collections may break 

 down the differences which appear to exist on the basis of the present material 



