420 RYDBERG: SOME SENECIOID GENERA—II 
hemispheric, about 15 mm. high and nearly 3 cm. broad in fruit; 
bracts 15-20, lanceolate, acute, glabrous; achenes broadly obo- 
void, slightly compressed, striate, 4 mm. long, 3 mm. thick; 
pappus in the specimen seen wanting, apparently fallen. 
Type collected in the Sierra Madre, Zacatecas, August 18, 
1897, J. N. Rose 2390 (U.S. Nat. Herb. no. 301300). 
34. Odontotrichum cervinum Rydberg, sp. nov 
Stem about 1 m. high, slender, striate, glabrous or tomentu- 
lous-puberulent in the inflorescence; woolly at the base; basal 
leaves long-petioled, the petioles 1.5-3 cm. long; blades rhombic- 
ovate to orbicular in outline, pedately divided to near the base, 
glabrous, 7~9 cm. long, and nearly as broad; divisions narrow, 
again cleft into linear divisions and some of these with 1 or 2 
lobes; stem-leaves smaller, usually twice ternate; heads rather 
few, paniculate; involucre campanulate, tomentulose, 6-7 mm. 
high; bracts 5-7; corolla tube 5 mm. long; lobes 4 mm. long, 
linear; achenes sparingly pubescent; pappus-bristles yellowish, 
5 mm. long, scabrous. 
Type collected between Pedro Paulo and San Blascito, 
Tepic, August 4, 1897, J. N. Rose 1986 (U. S. Nat. Herb. ne. 
300878). 
35- Odontotrichum calvum (Brand.) Rydb. 
Cacalia calva Brand., Univ. Calif. Publ. Bot. 4: 193. 191T. 
The type came from Cerro del Gavilan, Puebla. This is 
abnormal in the genus, as the pappus is wanting; not even the 
disk bearing the pappus is present. 
Cacaha cirstifolia H. & A. Bot. Beechey Voy. 436. 1841, 
may belong to this genus, but the incomplete description makes 
it very hard to locate in the key. I thought that it might be my 
own Odontotrichum filicifolium, which also came from Tepic, 
but the involucral bracts are given as 10, while in O. jilicifolium, 
they are only 5 or 6. 
NEw York BorTanicaL GARDEN 
