RYDBERG: SOME SENECIOID GENERA—I 377 
the original specific name. The type was collected between 
San Blas and Tepic. 
Tepic: Palmer 1832: Rose 2828. 
2. Pericalia suffulta (Greenm.) Rydb. 
Cacalia suffulta Greenm. Proc. Am. Acad. 32: 310. 1897. 
The type was collected above Cuernavaca, Morelos. 
MoreELOos: Pringle 9876, 6626 (type). 
3. Pericalia ovatifolia (Schultz Bip.) Rydb. 
Senecio ovatifolius Schultz Bip. Flora 28: 498. 1845. 
This is the type of the genus, which was based on Cacalia 
cordifolia H.B.K.,* not C. cordifolia L. 1781. Cassini, however, 
did not make the combination Pericaha cordifolia, which ap- 
peared for the first time as a synonym in De Candolle’s Pro- 
dromus.} Hemsley transferred it to Senecio as S. cardicphyllus. 
The type came from Santa Rosa, Mexico. 
Mexico: Purpus 5625; Vischer 14. 
JaLisco: Pringle 9860, 1736; Palmer 576; Safford 1451. 
SAN Luis Potosi: Palmer 47. 
MicHoacAn: Arséne 7347, 5720. 
4. Pericalia michoacana (B. L. Robinson) Rydb. 
Cacalia michoacana B. L. Robinson, Proc. Am. Acad. 43: 46. 
1907. 
This is known only from the type collection from Uruapan, 
Michoacan, Pringle rori7. 
MESADENIA Raf.; Loud. Gard. Mag. 8: 247. 1832. 
This is the same as CACALIA section CoNnopHoRA of De 
Candolle or ConopHoRA Niewl. The genus is closely related to 
Odontotrichum but the corolla has a distinct campanulate throat 
and the achenes are oblong and terete. It differs from the dis- 
coid species of Senecio in the white or whitish corollas and the 
longer corolla lobes. Usually the center of the receptacle is 
produced into a cone-shaped prolongation which gave the name 
Conophora. 
* Nov. Gen. & Sp. 4: 168. 1820. 
t DC. Prodr. 6: 328. 1837 
