GLEASON: CENTROPOGON AND SIPHOCAMPYLUS 193 
3. SIPHOCAMPYLUS VATKEANUsS A. Zahlb. Bull. Torrey Club 24: 
377- 1897. 
Sepals little exceeding the hypanthium; leaf-blades oblong- 
lanceolate, 6-10 cm. long, 2-3 cm. wide, acuminate, tomentose on 
the oe veins beneath, obtuse or rounded at base, on petioles 
1-2 om; 
2. Anther-tube white-woolly. 
4. SIPHOCAMPYLUS RADIATUS Rusby, Mem. Torrey Club 6: 73. 
1896. 
_ Sepals 20-25 mm. long, 3-4 mm. wide, somewhat dilated 
below; leaf-blades fadtsalace 15-25 cm. long, acuminate, flat 
above, not conspicuously reticulate, gradually narrowed below to 
an indefinite petiole or sessile ss 
4a. SIPHOCAMPYLUS RADIATUS MINOR A, Zahlb. Bull. Torrey 
Club 24: 376. 1897. 
Plant smaller in all its parts; pedicels surpassing the leaves. 
B. Hypanthium short-cylindric, higher than broad when pressed, or depressed- 
hemispheric; corolla-lobes usually shorter than the sea anther-tube densely 
woolly; fruit baccate, so far as 
I. Sepals linear or narrowly lanceolate, four to ten times as abate as ee longer 
than the short-cylindric hypanthium, equaling or tube, 
with rounded sinuses nearly or quite as broad as the cia: leaf-blades 
large, elliptic, 15-25 cm. lon 
5. CENTROPOGON INCANUS (Britton) A. Zahlb. Bull. Torrey 
Club 24: 374. 1897. 
- Siphocampylus incanus Britton, Bull. Torrey Club 19: 373. 
1892. 
Petals and sepals densely floccose with yellowish gray hairs; 
filaments little exserted, the anther-tube barely surpassing the 
corolla; leaf-blades 5-10 cm. long, abruptly acuminate, floccose 
below and somewhat so above. 
6. CENTROPOGON BRITTONIANUS A. Zahlb. Bull. Torrey Club 
24: 373. 1897. 
Siphocampylus giganteus latifolius Britton, Bull. Torrey Club 
405374. 1892. 
Petals and sepals thinly pubescent; filaments long (2 cm. or 
more)-exserted; leaf-blades 4-7 cm. broad, gradually acuminate, 
thinly tomentose on the veins beneath, puberulent above. 
