150 



MEMOIRS 'OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 10 



LEGUMINOSAE LOTOIDEAE 



Dioclea albiflora Cowan, sp. nov. 



Frutex scandens, ramulis cano-velutinis ; stipulae 2.5 mm longae, triangulares, 

 sparse pilosulae, persistentes ; folia pinnata, trifoliolata, petiolo 2.5-3.5 cm longo, 

 cano-velutino, stipellis setaceis, ea. 2 mm longis, pilosulis, petiolulis 3 mm longis, 

 cano-velutinis ; foliolorum laminae 4.5-8.5 cm longae, 3.5-6 cm latae, utrinque 

 cano-velutinae, base truncato-obtusae, apice obtusae et saepe rotundatae, folio- 

 lorum terminalium eae ellipticae vel late obovatae, foliolorum lateralium eae 

 oblique ellipticae, supra costa venisque primariis planis, infra salientibus; inflo- 

 rescentiae 30-68 cm longae, axe eano-striguloso, pedunculo ca. 12 cm usque ad 

 20 cm longo, pedicellis 5-8 mm longis, cano-strigulosis ; bracteolae 2-2.5 mm 

 longae, 1.5-2 mm latae, ovales, externc sparsissime strigulosae, floribus 30-35 

 mm longis; calyx sparse strigulosus, tubo 5-5.5 mm longo, intus sericeo, lobis 

 7.5-10.5 mm longis, lanceolatis, acutis; petala ciliolata, plerumque alba aliquando 

 pallido-purpurea ; vexillum ovale, apice bifidum, lamina 20-25 mm longa, 17-20 

 mm lata, stipite 3-4 mm longo ; alarum laminae 25-27 mm longae, 10 mm latae, 

 obtusae, ellipticae, stipite 4-4.5 mm longo, auriculo ca. 1.5 mm longo ; carinae 

 laminae ca. 20 mm longae, 8 mm latae, oblaneeolatae, ad apicem cohaerentes; 

 stamina omnia fertilia, filamentis tubo ca. 20 mm longo ; stylus glaber, 5.5 mm 

 longus; ovarium lineare, ca. 20 mm longum, 1 mm latum, sericeum ; fructus 

 anguste oblongus, in sutura adaxiali anguste alatus, 8.5-10.5 cm longus, 1.5 cm 

 latus, fuscus, leviter sericeus, 8-10-spermus, seminis pallido-fulvo- et atro-fulvo- 

 maculatis. 



Type Collection: J. J. Wurdaek and J. V. Monachino 39980 (holotype NY), 

 ' 'woody vine sprawling over low shrubs, locally frequent. Calyx pale purple; 

 corolla white with standard purple and yellow at base. Elev. 11)0-200 m (Seen 

 also on Cerro Nesrro Peron and Piedra Mapollos.) (Fruits collected at Pto. Aya- 

 cucho on Jan 31, 1956). Piedra Marimare, east bank of Rio Orinoco opposite 

 head of Isla el Gallo, Estado Bolivar, Venezuela, Dec 10. 1955." 



Paratypes: VENEZUELA: on crystalline laja 1-1.5 km east of Hotel Amazonas, Pto. 

 Ayacucho, 100-120 in elev., Nov 7, 1953, Maguire, WurdacTc, $ Bunting 36034; same locality 

 and collectors, Feb 18, 1954, 37711. 



Although the genus Dioclea badly needs revisionary study to determine the 

 morphologic limits of many of the species, D. albiflora appears to be quite dis- 

 tinct fron> those species with small bracteoles and with all the stamens fertile. 

 It is perhaps most nearly related to D. guianensis Benth., from which it ditfers 

 in leaflet shape, size of flower, length of pedicels, size of the fruit, and color of 

 the flowers. The flowers of the new species are usually pure white but some 

 are reported by the collectors as very pale violet. From D. avurensis H. B. K. 

 (emend Amsh.), another near relative, D. albiflora differs in leaflet size and 

 shape, length of pedicels, pubescence on leaflets and perianth, and in flower color. 



Dioclea rigida Cowan, sp. nov. 



Frutex scandens, ramulis rufo-pilosis ; stipulae 3.5 mm longae, triangulari- 

 ovatae, externe pilosae; folia trifoliolata, pinnata, petiolo 3-4 (-8) cm longo, 

 supra valde canaliculato, rufo-piloso, rachibus 1-2 cm longis, canaliculars et 

 pilosis, petiolulis 4-5 mm longis, leviter pilosis; foliolorum laminae lanceolato- 



2r 'By Richard S. Cowan. 



