Vol. 51 No. 11 
BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 
NOVEMBER, 1924 
Studies on the flora of northern South America—I. 
H. A. GLEASON. 
CENTROPOGON, SECTION BURMEISTEROIDES 
The genus Burmeistera Karst. is distinguished from Centro- 
pogon by the possession of green or greenish-yellow corollas of 
peculiar and characteristic shape and by the absence of terminal 
appendages from the two lower anthers. In Ceniropogon, these 
appendages are regularly present, and may consist either of a 
tuft of straight, separate, erect or reflexed hairs, or of a scale 
composed of accrescent hairs. The section Burmeisteroides is 
here constituted to include a group of species from the Andean 
region of northwestern South America with green or greenish 
corollas and with anther-appendages of villous or tomentose 
hairs. Differing from other species of Centropogon in these two 
features, they are also distinguished from Burmeistera by the 
longer and more slender corolla-tube, which is lobed to about 
the same depth on both upper and lower sides, and from most 
species of Burmeistera by the presence of conspicuous pubescence 
on the stem, foliage, flowers, or anthers. 
The fruit is a dry, indehiscent berry, of the type prevalent 
in Ceniropogon and Burmeistera. This feature serves to dif- 
ferentiate the section from some species of Siphocampylus with 
green or yellowish flowers, such as S. giganteus and its relatives. 
he older collections seem to include relatively few species 
of this section, but the recent explorations of Pennell, Killip, 
and Hazen have brought several undescribed species to light. 
The following are known to me from Colombia. 
Sepals 18-50 mm. long, linear. 
Calyx gamosepalous for 10-15 mm. above the base, 45- 
o mm. long; sepals glabrous on the back; anthers very 
sparsely hirsute on the connectives near the base..... C. Andreanus. 
[The BuLLETIN for OcToBER (51: 409-442) was issued October 24, 1924] 
443 
