374 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [yol. 9, No. 3 



Fork Cano Yutaje, at 1350 m alt., Cerro Yutaje, Amazonas, Venezuela, February 

 1, 1953, Bassett Maguire & Celia K. Maguire 35196 (NY). Paratypes: Cerro 

 Yutaje, Venezuela, Bassett Maguire & Celia K. Maguire 35213, 35067, 35268. 



C. punctata seems to have no immediate relatives, so far known, in the 

 region of the Guayana sediments. 



Senecio yapacanus Aristeguieta, sp. nov. 



Suffrutex scandens ramis tenuissime arachnoideis. Folia alterna petiolata, 

 chartacea. Petiolus 10-14 mm longus. Lamina elliptico-lanceolata apice acuta 

 vel attenuata acuminata basi rotundata, margine integra vel minutissime denticu- 

 lata, 8-12 cm longa, 3-5 cm lata, supra glabra, subtus tenuissimo velo lanato- 

 arachnoideo praedita vel glabra. Inflorescentia terminalis paniculata, axi 

 ramulisque leviter arachnoideis. Capitula discoidea, sessilia vel subsessilia 

 glomerata disposita. Involucrum cylindraceum, 5.5-6 mm longum, bracteis 8 

 lineari-oblongis apice acutis glabris. Calyculus cum 5 bracteolis 2-3 mm longis, 

 apice acuminatis, sub glabris. Flores 10, 3 exterioribus femineis, corolla 4 mm 

 longa, tubulosa glabra limbo 4-5-lobato; floribus centralibus hermaphroditis, 

 corolla 5.5 mm longa, tubulosa glabra limbo 5-lobato. Achaenia glabra, 1.5 mm 

 longa. Pappus albidus, 5 mm longus. 



TYPE: Vine, flowers white, occasional in cumbre, elev. 1200 m, Cerro 

 Yapacana, Terr. Amazonas, Venezuela, Jan. 3, 1951, Bassett Maguire, Richard 

 S. Cowan & John J. Wurdack 30719 (NY). Paratype: Woody vine, occasional on 

 west escarpment face, elev. 1800 m Cerro Huachamacari, Terr. Amazonas, 

 Venezuela, Dec. 14, 1950, Maguire, Cowan & Wurdack 30232. 



This new species is related to S. oronocensis DC. from the Bolivian Andes; 

 it differs by its scarcely arachnoid-lanose leaves never completely covered by 

 white tomentum on the lower surfaces and its completely glabrous involucral 

 bracts. The bracts of S. oronocensis are covered by a brown lanose tomentum. 

 S. oronocensis was described from a Haenke collection, since credited to 

 Venezuela. Dr. Cuatrecasas, however, informed me that the original locality was 

 Bolivia or eastern Peru and that S. baccaradiflorus Rusby is a synonym of 

 S. oronocensis. 



Senecio phelpsiae Cuatr., sp. nov. 



Frutex scandens, ramis in sicco badiis subrugosis et parce granulosis peri- 

 dermato plus minusve separabili extremis leviter striatis, valde juvenilibus 

 lana crispa ferruginea satis decidua tectis mox glabris. 



Folia alterna crassa viridia nitida, valde juvenilia tomento crispo ferrugineo 

 deciduissimo munita mox glaberrima. Petiolus 2-8 mm longus crassus. Lamina 

 succulenta oblongo-elliptica vel oblonga basi paulo attenuata apice obtusa vel 

 acutiuscula margine integerrima, 5-10 cm longa, 1-2.8 cm lata, utrinque laevis; 

 in sicco translucida, costa et nervis 5 paribus ascendentibus arcuatis filiformi- 

 bus immersis transpecte visibilibus. 



Inflorescentiae terminal es corymboso-paniculatae pedunculatae exfoliatae. 

 Pedunculus robustus folia excedentia cum ramis in statu juvenili tomento 

 lanuginoso ferrugineo munitus mox glaber. Rami ramusculique subteneres strio- 

 lati elongatique bracteolis lanceolatis vel linearibus muniti. Pedicelli graciles, 

 sed praecipue erecti, striolati mox glabri 1-2 bracteolis brevibus muniti 1.4-5 

 cm longi, apice incrassati 1-2-bracteolati. Capitula radiata. Calyculus nullus. 

 Involucrum campanulatum primum lanuginosum mox glabrum, 8 bracteis cras- 

 siuscule herbaceis oblongo-lanceolatis ca. 9 mm longis 1.8-3 mm latis, margine 

 scariosis. Receptaculum alveolatum marginibus breviter fimbriatum 2 mm latum, 

 Flores marginales feminei ligulatae 3-4, corolla lutea glabra ca. 14 mm longa, 



