152 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 10 



3: 176. 1939) on the persistent lower leaf surface pubescence of the Auyan-tepui 

 population. 



Graff enrieda steyermarkii Wurdack, sp. nov. Fig. 65, i-n. 



G. fruticosae Wurdack affinis sed foliis i. s. concoloribus floribus minoribus 

 bene pedicellatis calycis dentibus exterioribus brevioribus connectivi appendice 

 dorsali vix 0.1 mm longa. 



Ramuli novelli inflorescentiis hypanthiisque dense rufidulo-furfuracei. Petioli 

 0.5-2 mm longi; lamina 10-20 X 4-7 mm oblongo-lanceolata apice hebeti-acuta 

 basi acuta rigida concolorata supra glabra subtus sub lente dense resinoso- 

 furfuracea vix (ad 1 mm) 3-plinervata nervis secundariis supra obscuris subtus 

 vix elevatis utrinque 6-7. Tnfloreseentia 0.8-3 cm pedunculata terminalis; flores 

 per inflorescentiam 3-7 ubique 4-meri pedicellis 2.5-4 mm longis. Hypanthium 

 (ad torum) 2.5 mm longum ; calycis tubus 0.9 mm altus, lobis 0.6 X 1.9 mm 

 obverse ellipticis dentibus exterioribus obscure evolutis ca. 0.1 mm eminentibus. 

 Petala 9 X 4-5 mm obovato-elliptiea apice hebeti-acuta extus sparse resinoso- 

 papillosa. Pilamenta 3-3.5 mm longa; antherarum- thceac 3-3.2 mm longae, 

 connectivo basi 0.6-0.9 mm prolongato dorsaliter 0.1 mm calcarato. Stylus 

 8.5 X 0.3-0.4 mm; stigma punctiforme ; ovarium 3-loculare apice dense granuloso- 

 furfuraceum ; fructus 3-valvatus. 



Type. Shrub 3-5 feet tall, petals white, calyx brown, leaves subcoriaceous, 

 dark green above, yellow pale green below, older stems purple, younger stems 

 castaneous, Bonneiia forest on northwestern part of summit of Abacapa-tepui. 

 Chimanta Massif, Edo. Bolivar, Venezuela, alt. 1825-2000 m, 13 Apr 1953, J. A. 

 Steyermark 74883 (holotype F 1448602 ; isotypes NY, US). 



G. fruticosa has lower leaf surfaces completely covered with amorphous tawny 

 to pale indumentum, predominantly 5-6-merous scarcely pedicellate 50 per cent 

 larger flowers, external calyx teeth 1.5-2.5 mm long, and dorsal stamen appendage 

 0.8-1 mm long. G. steyermarkii represents an even more extreme reduction in the 

 evolutionary line mentioned in the original description of G. fruticosa; the 

 Chimanta species has the smallest dorsal calcar known to me in the genus, the 

 appendage being apparent only on boiled stamens. 



Graff enrieda miconioides Naud. 



Despite Cogniaux' description of a glabrous ovary for both this species and 

 the dubiously distinct G. floribunda Triana, material from Amazonian Colombia 

 (Schultes & Cabrera 12936, 17576) according with the type photograph (Mac- 

 bride 36204), as well as Peruvian material (Klug 3139) determined by Gleason 

 as G. floribunda, has furfuraceous ovary apices. Certainly conspecific with the 

 Colombian collections is Bernardi 1514 (NY), from Cario Auacapa, Rio Apacara, 

 Bolivar, Venezuela. 



Graff enrieda caudata Wurdack, sp. nov. 



G. obliquae Tr. affinis sed foliis apice longe caudatis venis primariis subtus 

 non barbatis calycis lobis minoribus. 



Rami novelli foliis inflorescentiisque primum modice granuloso-furfuracei 

 demum glabrati. Petioli 1.5-4.5 cm; lamina (acumine excluso) 7-13 X 4-7 cm 

 elliptica apice per 1.5-3 cm caudato-acuminata basi obtusa fragilis 5-plinervata 

 nervis primariis interioribus 0.5-1.5 cm subalternatim supra basim insertis nervis 



