1961] 



BOTANY OF THE GUAYAXA HIGHLANDS PART IV (2) 



75 



Dicymbe pharangophila Cowan, sp. nov. Fig. 51. 



Arbor 6-12 m alta, ramulis foliisque glabris, stipulis caducis. Petiolus 13-18 

 mm longus, eylindricus, rhachi 22-38 mm longa, cylindrica, foliolis l%-2- 

 jugatis, petiolulis 7-10 mm longis, laminis rigidis, ellipticis ad ovatos, 10-12.5 

 cm longis, 5-6 cm latis, marginaliter revolutis, ad basim rotundo-obtusis, ad 

 apicem obtuse aeutis, infra nigro-punetatis, venulis planis faciebus ambobus, 

 costa leviter salienti supra, infra valde salienti. Inflorescentiae usque ad 9 cm 

 longas, axe mierostriguloso, braeteolis erasso-coriaceis, 3 cm longis, 2 cm latis, 

 ovalibus, microstrigulosis extus, intus glabris, pedicello 25 mm longo, dense 

 mierostriguloso. Hypanthium cupulare, 6-7 mm longum, ca. 10 mm diametro, 

 microstrigulosum ; sepala 4, glabra, duobus exterioribus ovato-oblongis, obtusis, 

 25 mm longis, 17-20 mm latis, duobus interioribus 28 mm longis, 7 mm latis, 

 obtusis, anguste ellipticis; petala 5, alba, obtusa apiculataque, glabra intus, 

 extus aureo-sericea, inaequalia, 4—5.5 cm longa, 1-2.5 cm lata, anguste elliptica 

 ad obovata. Filamenta subulata, 6 cm longa, basilariter villosa, antheris 10 mm 

 longis, 3 mm latis, angnste ellipticis, connective) dorsualiter villoso. Stigma 

 capitellatum, stj^lo 6 cm longo, glabro ; ovarium oblongum, aureo-sericeum, 12 

 mm longum, 3 mm latum, sutura adaxiali valde dilata, gynophoro 5 mm longo, 

 ad basim glabro, apicaliter sericeo. Pructus ignotus. 



\ KXEZUELA: Amazonas: occasional in bottom of Canon Grande SSW of Cumbre Camp, 

 Cerro de la Neblina, alt. 1050-1100 m; tree 6-12 m; flowers white; 25 Dec 1957, Bassett 

 Maguire, John J. Wurdaek 4' Celia K. Maguire 42503 (holotype, US No. 2267450). 



■ Dicymbi pharangophUa (the specific epithet refers to the habitat of the 

 species: (f><xpx^c : "valley''; <£ias(o : "to love") is related to D. altsoni, D. corym- 

 bose!,, and another new species described since my preliminary review, D. bcr- 

 nardii. The four taxa are readily distinguished by the following key: 



1. Leaflets 2 jugate, punctate on the lower surface. 2. 



1. Leaflets 3-6-jugate, not punctate beneath. 3. 



2. Leaflet acute basally. Inflorescence velutinous; bracteoles 18 mm long, 10 mm wide, 

 ovate; hypanthium 3 mm deep, 5 mm in diameter; filaments ca. 25 mm long. 



3. D. corymbosa. 



2. Leaflets rounded-obtuse. Inflorescence microstrigulose ; bracteoles 30 mm long, 20 mm 

 wide; hypanthium 6-7 mm long, 10 mm diameter; filaments 60 mm long. 



3'. D. pharangophUa. 



3. Leaflets 5-6-jugate, microstrigulose on the lower surface. Pedicels 10-25 mm long, 



the bracteoles 15-18 mm long; ovary densely pilose. 2^ D. altsoni. 



3. Leaflets 3-jugate, glabrous. Pedicels 30-32 mm long, the bracteoles 25 mm long; 



ovary strigose and strigulose. 2'. D. bernardii. 



Macrolobium Sehreb. 



More than a dozen new taxa have been added to this genus since I pub- 

 lished a revisional study of it in 1953. To facilitate the placement of these 

 taxa, as well as ones to be described later, in the taxonomic sequence established 

 in my earlier study, I have recast the single key to the species. In the following 

 pages, keys are presented to several series; the term is not intended to have 

 any taxonomic status or phylogenetic significance but is used solely as a 

 mechanical device to make possible future ''updating" without extensive re- 

 publication of keys. Each new taxon has been assigned a number that will 

 serve to align it with its nearest relatives. 



