100 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
scabrous above, paler and somewhat canescent-pubescent beneath, 
5 to 7 cm. long: ligules (about 13) 1 to 1.3 cm. long.—Gen., 2, 362; 
Hemsl., 1. c.; Gray in Wats., Proc. Amer. acad., 22, 424. Zaluzci- 
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. 
-t- Scales of the involucre not canescent. 
29. G. latibracteata, Ilemsl. 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”) cm. long, 1 to 3 
cm. broad: peduncles 5 to 7 cm. long, 1-headed; heads (excl. of 
ligules), 1.5 cm. in diameter; involucre campanulate: rays few, 1.2 
to 1.4 cm. long.— Hemsl., 1. c., 162. — Cerro Pinar, North Mexico, 
Seemann , no. 1485. Collected but once. 
-i- Scales of the involucre canescent. 
30. G. ensifolia, Benth. and Hook. f. Stems slender, terete, 
strigillose, and scabrous: leaves opposite, sword-shaped, 1 to 1.2 
dm. long, 1 to 1.5 cm. 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 outer 
much shorter. — Gen., 2, 364; Hemsl., 1. c., 161. Montagnea ensi¬ 
folia, Sch. Bip. in Seem. Bot. herald, 304. Zaluzania ensifolia , 
Sch. Bip., Flora, 1864, p. 216. — Sierra Madre, Northern Mexico, 
Seemann, no. 2007 in part; Tepic, Palmer (coll, of 1892). 
31. G. sericea, Klatt. u Suffrutescent ” : leaves chiefly oppo¬ 
site, ovate, shortly connate-petiolate, entire, 3-nerved, acute, acu¬ 
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 sericenm, Sch. Bip. acc. to 
Klatt, 1. c.— Mexico, without locality, Liebmann , no. 609. Type 
in herb. Botanic garden of Copenhagen; excellent drawing and 
some fragments in herb. Gray. 
