200 GLEASON: CENTROPOGON AND SIPHOCAMPYLUS 
Filaments tomentose toward the summit; anther-tube pubes- 
cent in lines; sepals equaling the hypanthium or a little shorter; 
leaves crenate. 
34. CENTROPOGON SURINAMENSIS (L.) Presl, Prodr. Monogr. 
Lobel. 48. 1836. 
Lobelia surinamensis L. Sp. Pl. ed. 2, 1320. 1763. 
Filaments glabrous or with scattered hairs; anther-tube 
sparsely hirsute or glabrous; sepals serrate, distinctly exceeding 
the hypanthium: leaves denticulate. 
2. Sepals linear-triangular to ovate, with narrow acute sinuses; leaf-blades oblong- 
lanceolate to lanceolate, usually sharply denticulate; flowers in terminal corym- 
bose clusters. * 
pals narrowly linear-triangular, entire, much longer than the hypanthium. 
35. CENTROPOGON AMPLIFOLIUS Vatke, Linnaea 38: 716. 1874. 
** Sepals triangular-ovate to broadly ovate. 
36. CENTROPOGON Banco A. Zahlb. Bull. Torrey Club 24: 
372. 1897 : 
Sepals triangular-ovate, entire, shorter than the hypanthium. 
37. CENTROPOGON ROSEUS Rusby, Bull. N. Y. Bot. Gard. 8: 
7123. 20tg. 
Sepals broadly ovate, foliaceous, denticulate. 
IV. Species of uncertain position, specimens of which have not been seen. 
38. CENTROPOGON MAGNIFICUS Zahlb. & Rechinger, Med. Rijks 
ay PAOLO 3G? 50. 9913. 
Evidently a member of the first group of this conspectus; 
compared by the authors with C. Mandonis Zahlb., from which it 
differs in its fewer flowers on longer pedicels, straight-edged sepals, 
denser pubescence on the corolla, obviously lignified twigs, and 
stiffer rough leaves. 
39. CENTROPOGON HeErRzoc1 Zahlb. & Rechinger, Med. Rijks 
Herb. 19: 49. 1913.’ 
Evidently a member of the second section of this conspectus, 
as indicated by the description of the corolla; flowers axillary, 
hypanthium globose or subglobose, sepals short, acute, broadly 
triangular, anther-tube glabrous, except the terminal tuft. 
