RYDBERG: SOME SENECIOID GENERA—II 413 
Leaf-blades dentate or crenate, gre 
Stem-leaves much reduced; base ee the stem 
wooly ; inflorescence acute at the base..... 23. O. Purpusi. 
Stem-leaves ample; base of the stem not 
woolly; inflorescence globose ............ 24. O. globosum,. 
Leaf-blades deeply 5-cleft, densely tomentose 
beneath; stem woolly at the base........... 25. O. eriopodum. 
Leaves digitately or pedately ribbed and lobed or 
ivided. 
Leaves palmately lobed or cleft. 
; pa Sp blades about 2 dm. wide; bracts 8; 
6 S=1O eerie a ee eels 30. O. Liebmannii. 
flowers $. so, eve 31. O. pallescens. 
Leaves fails divided to near the base. 
Divisions of the leaves broad, the ultimate ones 
lanceolate. 
Heads corymbose; involucre 6 mm. high; 
leaves 3-5- aba achenes hairy........ 32. O. napellifolium. 
Heads solitar about 15 mm. high 
leaves seed as ies achenes glabrous..... 33. O. delphinifolium 
Divisions of the leaves narrow, linear. 
Leaf-blades PHS primary divisions 5; 
PAVGUS Presents: (Sa ovis ee res ees ve 4. O. cervinum. 
Leaf-blades seers primary divisions 
O-21 i pappus wanting 4 6.2 c6. eave 35. O. caluum. 
I. QODONTOTRICHUM CIRSIIFOLIUM Zucc. Abh. Baier. Akad. 
Wiss. 1832: 511. 1832. 
This is the type species of the genus as stated before and the 
same as Cacalia cervariaefolia DC. and Senecio cervariaefolium 
Hemsley. An illustration is given in Biologia Centrali-Ameri- 
cana, pl. 51. The type was collected in Mexico by Karwin- 
sky, probably in Oaxaca, in which state he spent most of the 
time during his first journey. 
Oaxaca: Pringle 48094. 
2. Odontotrichum bipinnatifidum (A. Gray) Rydb. 
Mesoneuris bipinnatifida A. Gray, Proc. Am. Acad. 8: 661. 1873. 
This species, the type of Mesoneuris, is closely related to the 
preceding, and when better known, they might be found to be 
identical. It may also be the same as Sciadoseris vaginata 
Kunze, but I prefer to use — s specific name as the identity 
of the latter is not doubtful 
Cutapas: Giesbreght 805 tony, 
