194 Gleason: Centropogox and Siphocampylus 



6a. Centropogon Brittonianus brevidentatus Zahlb. & Rech- 

 inger, Med. Rijks Herb. 19: 51. IQI3- 

 The authors state that the variety differs from the species in 

 sepals only 10-12 mm. long and in much narrower and longer 

 corolla-lobes. 



2. Sepals broadly ovate to oblong, less than four times as long as wide, mostly 

 shorter than the corolla-tube and not much exceeding the hypanthium, with 

 narrow acute sinuses; hypanthium depressed-hemispheric or somewhat 

 urceolate. 



a. Sepals broadly ovate-triangular, herbaceous. 



7. Siphocampylus tunicatus A. Zahlb. in herb. 

 Hypanthium and foliage nearly glabrous; leaf-blades broadly 



elliptic to obovate, 20-25 cm. long, 7-13 cm. wide, thin, abruptly 

 acuminate; additional characters as in the key. 



Type collected April, 1892, in Bolivia, at an altitude of 3000 

 m., by Otto Kuntze, and deposited in the herbarium of the New 

 York Botanical Garden. A second sheet from the same collector 

 comes from Santa Rosa, Bolivia, and is possibly a part of the 

 same collection. The fruit is unknown but the floral characters 

 show unmistakably the close relation of the species to the two 

 following, Centropogon Mandonis and C. gloriosus, and it is 

 quite probable that it will eventually be transferred to the genus 

 Centropogon. 



b. Sepals oblong or oblong-ovate, thick and firm, serrulate. 



8. Centropogon Mandonis A. Zahlb. Ann. K. K. Naturhist. 



Hofmus. Wien 6: 438. 1891. 

 Corolla-tube about twice as long as the erect, narrowly oblong 

 sepals; filaments much surpassing the corolla; anther-tube hirsute 

 with tawny hairs; leaves acute. 



9. Centropogon gloriosus (Britton) A. Zahlb. Bull. Torrey 



Club 24: 373. 1897. 

 Siphocampylus gloriosus Britton, Bull. Torrey Club 19: 373. 



1892. 

 Corolla-tube one third to one half longer than the oblong-ovate, 

 frequently spreading or renexed sepals; filaments about equaling 

 the corolla; anther- tube hirsute with purple hairs; leaves long- 

 acuminate. 



