196 Gleason: Centropogon and Siphocampylus 



13. Siphocampylus Williamsii Rusby, Bull. N. Y. Bot. Gard. 



8: 122. 1912. 



|| || Leaf-blades lanceolate to ovate-lanceolate, petioled, membranous, sharply and 

 irregularly spinulose, 8-12 cm. long. 



14. Siphocampylus boliviensis A. Zahlb. Ann. K. K. Natur- 



hist. Hofmus. Wien 6: 443. 1891. 

 Sepals equaling or barely exceeding the subglobose hypanthium ; 

 stems stout; leaves firm, brownish and scabrously pubescent be- 

 neath. 



15. Siphocampylus dubius A. Zahlb. Bull. Torrey Club 24: 



385- i897- 

 Sepals longer than the depressed-hemispheric hypanthium; 

 stems slender; leaves thin, green and puberulent on the veins 

 beneath. 



ft Peduncles short, equaling or shorter than the flowers, which do not surpass the 

 subtending leaves; hypanthium turbinate; sepals linear, refiexed; leaf-blades 

 oblong, short-petioled; stems climbing. 



16. Siphocampylus membranaceus Britton, Bull. Torrey Club 19 : 



372. 1892. 

 Leaves thin, membranous, sharply spinulose-dentate, veiny; 

 peduncles equaling the corolla. 



17. Siphocampylus oblongifolius Rusby, Mem. Torrey Club 



6:73. 1896. 

 Leaves firm, minutely and remotely spinulose; peduncles 

 shorter than the corolla. 



** Sepals narrowly triangular, shorter than the hypanthium. 



18. Siphocampylus correoides A. Zahlb. Bull. Torrey Club 



24: 382. 1897. 

 Foliage and flowers tomentulose; leaf-blades broadly ovate, 

 undulate and spinulose-denticulate, 15-25 mm. long. 



ii. Flowers in terminal corymbs or much abbreviated racemes; hypanthium turbinate 

 or somewhat urceolate; sepals about equaling the hypanthium, distant, with 

 rounded sinuses; leaf-blades sharply and saliently serrate, of an ovate type, 

 firm, dull-green. 



19. Siphocampylus corymbiferus Pohl. Plant. Brasil. 2: 112. 



pi. 175. 1831. 

 Lobelia corymbifera Presl, Prodr. Monogr. Lobel. 37. 1836. 

 Siphocampylus gracilis glabris Britton, Bull. Torrey Club 19: 



374. 1892. 

 Leaves glabrous. 



