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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 10 



lanceolatis apice rotundatis 7-8 mm longis 2.5-3 mm latis 1.5 mm crassis 3.5 

 mm infra apicem sulcatis; staminibus 6 prope medium tubi corollae insertis; 

 antheris lineari-oblongis 4.5 mm longis 1 mm latis ; stylo 2-6.5 mm longo 1 mm 

 lato glabro sulcato ; stigmatibus 4 longioribus quam stylis in alabastro brevioribus 

 quam stylo in anthesi oblongo-lanceolatis obtusis 4-5 mm longis 1 mm latis 

 carnoso-papillatis ; ovario late oblongo 4-5 mm alto 3 mm lato apice cum disco 

 crasso annulari 0.7 mm alto coronato. 



BRITISH GUIANA. Northeast side of Mount Ayanganna; mixed evergreen 

 forest; alt. 884-915 m; leaves moderately thick, brittle, dark green above, lighter 

 below ; calyx greatly enlarged, spherical in shape ; corolla white, thick, fleshy, 

 lobes 6 ; stamens yellow, 6 ; stigma 3-lobed ; base of corolla within white-villous ; 



2 Aug 1960, Stephen S. & Carolyn L. Tillett c(- Rufas Boyam 44992 (holotype 

 NY). 



This species has an umbel of three inflorescences on peduncles terminating 

 the stem. In this respect it approaches 8. polycephala DC, from which it differs 

 in the hexandrous, 6-parted corollas, relatively fewer-flowered heads, larger and 

 broader leaf-blades more acutely pointed, and greater reduction of involucre. 

 It is easily distinguished by its combination of ternately umbellate peduncles, 

 few-flowered inflorescences, marked reduction of involucre, and hexandrous 

 6-parted corollas. 



Schradera yutajensis Steyermark, sp. nov. Fig. 70, G-II. 



Frutex (teste Maguire) 2-3-metralis ; stipulis terminalibus aliter caducis 

 elliptico-oblongis vel oblongis apice obtusis vel rotundatis 12-19 mm longis 6-7 

 mm latis infra medium parce pilosulis aliter glabris; foliis petiolatis, petiolis 

 10-14 mm longis glabris; laminis subcoriaceis oblongis vel Qvato-oblongis apice 

 obtusis vel subobtusis vel acutis, basi obtusis vel rotundatis 7-11.5 cm longis 

 3-6.5 cm latis glabris, nervis lateralibus tenuibus utroque latere 8-10 subtus 

 plerumque manif estis supra obsoletis vel fere obsoletis ; capitulis 9-12-floris 

 subhemisphaericis 12-20 mm altis 22-27 mm latis; pedunculo solitario terminali 

 3-5 cm longo basi 2-3 lato apice incrassato 4-5 mm lato glabro ; involucro 

 6-lobato 8 mm alto; calyce hypanthioque obconicis 10-11 mm longis basi 2-2.5 

 mm latis apice 7 mm latis glabris, calyce apice truncato : corolla alba (teste 

 Maguire) 17 mm longa cylindrico-campanulata, tubo 10.5 mm longo basi 4 mm 

 lata, infcus supra medium moderatim pilosa aliter glabra, lobis 5 reflexis lanceo- 

 latis acutiusculis 6 mm longis 2 mm latis incrassatis 3.5-4 mm infra apicem 

 sulcatis cucullatis ; staminibus 5 supra faucem 1.5 mm exsertis in fauce tubi 

 corollae insertis ; antheris lineari-oblongis 3.2 mm longis 0.8 mm latis ; filamentis 



3 mm longis glabris ; stylo 5 mm longo glabro ; stigmatibus 3 brevioribus quam 

 stylo anguste lanceolatis obtusis 3 mm longis 0.5 mm latis papillato-carnosis. 



VENEZUELA. Amazonas: occasional in woodland along right fork of Cailo 

 Yutaje, Cerro Yutaje ; alt. 1500 m ; shrub 2-3 m high ; flowers white ; 21 Feb 

 1953, Bassett & C. K. Maguire 35356 (holotype NY). 



This species resembles S. surinamensis Standi., from which it differs in the 

 outer puberulent basal half of the stipules, shorter peduncles, and more obtusely 

 pointed stipules. Since none of the known specimens of S. surinamensis possess 

 corollas, no comparison can be given with respect to floral characters. 



