2l6 



THE CACTACEAE. 



PUBLISHED SPECIES. KNOWN TO US ONLY FROM DESCRIPTION. 



estrcllensis Weber (Monatsschr. Kakteenk. 15: 167. 1905) is, according 



Cereus 



; Werckle. similar to Cereus nycticallus but weaker and more 



flowers are small, rosy to salmo 



stems 

 It is of Costa Rican 



may 



Weberocereus. 



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WERCKLEO CEREUS 



1909 



mitting 



short bristles or very weak spines and a tuft of felt; flowers short-funnelform, the tube rather stout; 

 ovary and flower-tube bearing many areoles, each with several nearly black, acicular spines and a 

 tuft of short black felt, subtended by minute scales; outer perianth-segments lanceolate, acutish, 

 narrow; inner perianth-segments broader; stamens many; style about as long as the longer stamens, 



gma-lobes; berry 



Guatemala 



Werckle 



Weber 



resemble 



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Key to Species. 



Flowers 8 cm. long or less; stcm-arcoles at most bristly ^ i. W. tonduzii 



Flowers lo cm. long or more; stcm-areoles with weak but definite spines 2. W, glaber 



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Werckleocereus 



1909 



Cereus tonduzii Weber, Bull. Mus. Hist. Nat. Paris 8: 459. 1902. 



■"^ Stems rather stout, bushy-branched, the joints 3-angled, rarely 4-angled, deep green, not at 

 all glaucous, climbing by aerial roots; margins of ribs nearly straight; areoles small, felted, without 

 spines, but sometimes with weak bristles; flowers 8 cm. long or less, areoles of the ovary and tube 



gments 



stamens 



style longer than the stamens; berry globose, citron-yellow, its apex umbilicate, its flesh white. 



Type localily: Copey, near Santa Maria de Dota, Costa Rica. 



D 



4- fc.r'" 



greenhouse cultivation some plants are remarkably 

 m in bloom. 



L'V 



Egure 3, shows part of a plant which flowered in the New York 



Garden, March 30, 1908. 



from a ohotoefraoh of a olant in the same 



2. Werckleocereus glaber (Eichlam) Britton and Rose, Addisonia 2: 13. 1917. 



Cereus glaber Eichlam, Monatsschr. Kakteenk. 20: 150. 19 10. 



Stems slender, 3-angled, about 2 cm. broad, pale green and slightly glaucous, climbing by aerial 

 roots; margins somewhat knobby, the areole borne on the upper part of the knob, small, 3 to 4 cm. 

 apart; spines 2 to 4, short, i to 3 mm. long, acicular, but with swollen bases; flower 10 cm. long or 

 more, the ovary and tube bearing clusters of yellow to brown acicular spines; inner perianth-segments 

 white, oblanceolate, acute, somewhat serrate; style pale yellow, weak, resting on the under side of 

 the flower-tube; stigma-lobes white; fruit not known. 



Type locality: Western coast of Guatemala. 

 Distrihtition: Guatemala. 



In habit this species much resembles Wtlmattca minuiiflora, also from Guatemala, 

 but its flower characters are quite different. 



Illustration: Addisonia 2: pi. 47. 



Plate XXXIX, figure 4, is from a specimen obtained by Dr. Rose from Guatemala, 

 which flowered in the New York Botanical Garden, April 14, 191 5. 



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