8i2 - PROCEEDINGS OF THE AMERICAN ACADEMY, 
nate, crenulate, 1.4 dm. long; petioles 3 cm. long: heads in a loose 
leafy panicle. — Proc. Am. Acad. xxxiii. 93. — Hillsides near Acapulco, 
Palmer, no. 44. Type in herb. Gray. 
f 9. M. . Roser, Robinson & Greenman. Similar to the last, but with 
“ lance-ovate serrate unlobed leaves, bullate above, green beneath, not half 
so broad as long: heads numerous, very silky, borne on filiform rag 
=~ Proc. Am. Acad. xxxii. 45. Montanoa sp. Rose, Contrib. U. S. N: 
Herb. i. 103.— Alamos, W. Mexico, Palmer, no. 894, Goldman, no. 
294, tos in herb. Gray. 
Subg. 2. AcANTHOCARPHA. Heads of medium size, less numerous: 
ligules 7 to 10: pales sub-glabrous or thinly villous, the spinescent tip 
straight or recurved. — Montagna § Acanthocarpha, DC. 1. ¢. 565. — 
Leaves ovate to lance-oblong, crenate, serrate, angled or palmately lobed, 
very rarely (M. macrolepis) pinnately lobed. Nineteen species of Mex- 
ico and Andean South America. 
* Invoiucral bracts (1 cm. long) spatulate-obovate, considerably exceeding 
e disk-flowers 
10. M. Pringlei. Shrub: branches glabrate, covered with a rough 
gray cortex; branchlets pulverulent-tomentulose: leaves lanceolate or 
oblong-lanceolate, acute, serrate, 4 to 8 cm. long, 1.5 to 3 em. broad, 
green and scabrous above, canescent-tomentose beneath, gradually nar- 
rowed into wings decurrent nearly to the base of the petiole: heads few, 
2 or 8 at the ends of the branches, on slender erect peduncles (4 to 5 cm. 
long): ligules about 7, from 6 to 8 mm. long: pales (in anthesis) grad- 
ually attenuate, villous. —Calcareous hills near Tehuacan, Puebla, 28 
July, 1897, C. G. Pringle, no. 7491. Well marked by its spatulate 
involucral bracts, which appear to be unique in the genus. Type in 
herb. Gray. 
* * Involucral bracts broadly oblong, obtuse or rounded at the apex (7 to 10 mm. 
long, half as broad): leaves pinnately and sinuately 3(-5)-lobed. 
11. M. macrouerts, Robinson & Greenman. Shrub, 1 to 2 m. high: 
heads few (1 to 5 at the ends of the branches), 1 to 2 cm, in diameter 
exclusive of rays, conspicuous and well marked in fruit by the elongated 
gradually attenuate straightish pungent stramineous ciliate but otherwise 
glabrate pales. — Proc. Am. Acad. xxxii. 44.— Oaxaca, Las S 
Pringle, no. 4932, Macihenee (Salomé), L. C. Smith, no. 818, 29 km. 
southwest of the elty of Oaxaca, L. W. Nelson, no. 1375. ti in herb. 
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