100 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
scabrous above, paler and somewhat canescent-pubescent beneath, 
5 to7 cm. long: ligules (about 13) 1 to 1.3 em. long.—Gen., 2, 362; 
Hemsl., 1. ¢.; Gray in Wats., Proc. Amer. acad., 22, 424. Zaluza- 
nia squarrosa, Sch. Bip., Flora, 1864, p. 217. — Ravines near Guada- 
lajara, Jalisco, Oliva (1854), Palmer, nos. 486, 741 (1886), Pringle, 
nos. 2194, 2474 (1888-89). Flowering from September to Novem- 
ber. 
******* Heads small or medium-sized, slender-peduncled: involucral 
bracts (all but a few of the outermost) broad, obovate or oblong, mostly 
obtuse or rounded at the apex: leaves ovate or lanceolate to linear-oblong. 
+ Scales of the involucre not canescent. 
29. G. LATIBRACTEATA, Hemsl. ‘Stems terete, striate, purple, 
alternately branched above, sparingly scabrous-pubescent: leaves 
alternate (so far as known), lanceolate, attenuate at each end, 
short-petioled, obsoletely serrate, 6 to 8 (“to 13”) em. long, 1 to3 
em. broad: peduncles 5 to 7 em. long, 1-headed; heads (excel. of 
ligules), 1.5 em. in diameter; involucre campanulate: rays few, 1.2 
to 1.4 em. long.— Hemsl., |. ¢., 162. — Cerro Pinar, North Mexico, 
Seemann, no. 1485. Collected but once. 
+ + Scales of the involucre canescent.. ; , 
V, Pus itai'a (Se =o 
30. G, ENSIFOLIA, Benth--arid Hook. f. Stems slender, terete, 
strigillose, and scabrous: leaves opposite, sword-shaped, 1 to 1+ 
m. long, 1 to 1.5 em. broad, gradually narrowed from near the 
sessile base to the attenuate apex, very scabrous above, pale beneath : 
heads cymose; involucral scales all rounded at the apex, the omtey 
much shorter. —Gen., 2, 364; Hemsl., l.c., 161. MMontagnea digas 
folia, Sch. Bip. in Seem. Bot. herald, 304. Zaluzania ensifoltd, 
Sch. Bip., Flora, 1864, p. 216.— Sierra Madre, Northern Mexico, 
Seemann, no. 2007 in part; Tepic, Palmer (coll. of 1892). 
31. G. sericea, Klatt. “Suffrutescent”: leaves chiefly opp 
site, ovate, shortly connate-petiolate, entire, 3-nerved, acute, act- 
minate, 3 to 4 cm. long, half as broad, above green and scabrous, 
beneath silky canescent: heads 1.2 cm. in diameter; involucral 
bracts biseriate, oblong, subequal: rays about 20, narrowly oblong: 
—— Leopoldina, 23, 90. Microcephalum sericeum, Sch. Bip. ace. to 
Klatt, 1. c.— Mexico, without locality, Ziebmann, no. 609. Type 
in herb. Botanic garden of Copenhagen; excellent drawing and 
some fragments in herb. Gray. 
