194 GLEASON: CENTROPOGON AND SIPHOCAMPYLUS 
6a. CENTROPOGON BRITTONIANUS BREVIDENTATUS Zahlb. & Rech- 
inger, Med. Rijks Herb. 19: 51. 1913. 
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 Manponis A. Zahlb. Ann. K. K. Naturhist. 
Hofmus. Wien 6: 438. 1801. 
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 reflexed sepals; filaments about equaling 
the corolla; anther-tube hirsute with purple hairs; leaves long- 
acuminate. 
