1957] 



BOTANY OF THE PHELPS' VENEZUELAN GUAYANA EXPEDITIONS— -II 



481 



obsolete prominulis vel obsoletis subtus obsolete prominulis; inflorescentiis 

 femineis ad ramulorum hornotinorum basin singulatim congestis vel in foliorum 

 axillaribus solitariis 1-3-floris; floribus ignotis; pedunculis fructiferis pilosulis 

 ad 7 mm longis, pedicellis 3-4 mm longis, cum calycibus pulverulo-pilosulis; 

 drupa immatura globosa, 5.0-5.5 mm diam., stigmate prominulo vel vix prominulo 

 coronato, in sicco minute rugoso 4-vel raro 5-pyrenifero. 



TYPE: tree to 10 m, abundant in little forests, none in bloom, sabana, west 

 slope of Uaipan-tepui at 1400 m alt., Bolivar, Venezuela, January 27, 1948, 347 

 (NY). Paratypes; Cerro Uaipan, 1700 m, F. Cardona 2062; tree 30 feet tall; 

 leaves coriaceous, deep green and shining above, pale green below, punctate 

 below; fruit dull green, rich woods, vicinity of "Misia Kathy Camp" on mesa 

 between Ptarf-tepui and Sororopan-tepui, Bolivar, alt. 1615 m, Steyermark 60290. 



Related to /. spruceana Reiss. and /. duidae Gleason. From the former it 

 may be distinguished by the very short petioles, longer peduncles, 1-3-flowered 

 cymules, and non-sulcate globose fruits; from the latter by the slightly shorter 

 petioles, puberulous branchlets, peduncles, and pedicels, and larger globose 

 drupes not tapering apically. 



MAL PIGHIACEAE 



Tetrapterys phylladenophora Maguire & Steyermark. Subg. Mischolepis Niedenzu, 

 sect. Macrophyllaries Niedenzu. (Fig. 121.) 



Frutex parvus; ramulis teretibus 2-3 mm diam. adpresso-fulvo-sericeis; foliis 

 oppositis, laminis oblanceolatis, 6-8 cm longis (3) 3.4-4.5 cm latis, supra pube- 

 rulis vel glabrescentibus subnitidis, subtus dense fulvo-sericeis glandulis ses- 

 silibus submarginalibus, 6-7 jugis venis lateralibus prominulis, apice brevi- 

 acuminato vel cuspidato, base subacuta, petiolis 6-8 mm longis, eglandulosis, 

 stipulis minutis, minus 0.3 mm longis; inflorescentiis sericeis axillaribus foliis 

 brevioribus paucifloris, ramulis unifloris, bracteis lanceolatis acutis, ca. 2 mm 

 longis, bracteolis ovatis vel subrotundatis, 2-3 mm longis; sepalis ovato-oblongis 

 vel subrotundatis, 3-4 mm longis, subcarnosis prominenter biglandularibus. laminis 

 extus sericeis, intus glabris; petalis flavis, 8-10 mm longis, unguibus ca. 2 mm 

 longis, laminis suborbicularibus fimbriatis; staminibus 10, filamentis inaequi- 

 lateralibus, sepalis oppositis longioribus angustioribusque, antheris 1.0-1.3 mm 

 longis; pistillis 3, ovariis hirsutulis quadrialatis (immaturis), stylis glabris 

 erectis, ca. 4 mm longis, apice dorso apiculato, stigmate discoideo. 



TYPE: bush 2 m high with yellow axillary flowers, petals 5 fimbriate, leaves 

 especially the young ones soft, silvery, rare, 1400 m alt., Uaipan-tepui, Bolivar, 

 Venezuela, February 10-15, 1948, 426 (NY). Paratypes: arbusto de flores amaril- 

 las, crece en las orillas de un arroyo Kavanayen, Guayana, Venezuela, May 28, 

 1947, Lasser 1785; shrub 10 feet tall, leaves subcoriaceous, dull green above, 

 gray-green below, on large mesa, Kavanayen northwest to Rio Karuai, alt. 1220 m, 

 Bolivar, Steyermark 59381; liana on shrubs, fruit wings red, 8 km northwest of 

 Kavanayen, Styermark 6045 1. The fruits of this specimen are described as 

 follows: samara sericeo-hispidulous, body suborbicular 3-4 mm long, lateral 

 wings subequal membranous red, 2 superior wings obliquely erect, obliquely 

 lineaManceolate the apex obtuse entire or subentire 13-14 mm long 2.5 mm 

 wide, the 2 inferior wings obliquely linear-oblanceolate 14-16 mm long 3.0-3.5 

 mm wide, aluta dorsal semi-orbicular-annuliform subentire 2.5*3.0 mm wide 

 scantily sericeo-pube scent below. 



Our species seems to fit into sect. Macrophyllaris of subg. Mischolepis, but 

 to be without immediate relatives in Venezuela, other than perhaps T. oleifolia 

 (Benth.) Niedenzu from Mt. Roraima. 



