10 PROCEEDINGS OF THE AMERICAN ACADEMY. 
«+ «+ Inner bracts of the involucre 8; flowers 10 to 25. 
= Leaves strongly discolorous, silvery-sericeous beneath. 
__\8. T. hyposericea, Wats. Slender branching shrub with smooth 
light brown terete branchlets and narrowly lanceolate entire attenuate- 
acuminate willow-like leaves 4 to 6 em. long, 6 mm. broad, green, 
slightly rugose, and inconspicuously villous above, white and silky-villous 
beneath: pedicels slender, finely appressed-pubescent ; heads small, 1.4 
em. long; outer involucral bracts small, lanceolate, green, 3 to 4 mm. 
long, the inner about 1 em. long. — Proe. Am. Acad. xxv. 157 (1890). — 
JALIsco: in a barranca near Guadalajara, Pringle, no. 1741 (hb. Gr.). 
9. T. Pringlei, n.sp. Shrub ; stems below covered with a light gray 
cortex, glabrous; branchlets subappressed-tomentulose and sericeous: 
leaves lanceolate, 3 to 7 cm. long, 6 to 12 mm. broad, acuminate, acute, 
entire, revolute-margined, narrowed below into a subpetiolate base, sub- 
hirtellous above, silvery-tomentose and sericeous beneath : inflorescence 
loose; heads 15 to 18 mm. high, 12-15-flowered; inner scales of the 
inyolucre about 1 cm. in length and as well as the outer glandular-puber- 
ulent.— Oaxaca: Tomellin Cafion, alt. 925 m., 22 December, 1894, 
Pringle, no. 5894 (hb. Gr.). 
10. T. Haenkei, Scn. Bir. Shrub; stems covered with a brown cortex, 
at first sericeous-tomentose, later glabrate: leaves lanceolate to lance- 
oblong, 3 to 12 cm. long, 1 to 3.5 em. broad, acuminate, acute, entire 
or denticulate, subsessile or narrowed at the base to a short petiole 
8 mm. or less in length), at first pubescent above but soon glabrate, 
silky-tomentose beneath: inflorescence dense; heads 1.5 to 2 em. high, 
12-14-flowered; inner bracts of the involucre 8, about 14 mm. in 
length, appressed-pubescent often with gland-tipped hairs intermixed, 
usually longer than the outer bracts. — Sch. Bip. in Seem. Bot. Herald, 
314 (1852-57) ; Hemsl. Biol. Cent.-Am. Bot. ii. 258; Mueller, Ann. v- 
314. T. angustifolia, Vasey & Rose, Contr. U.S. Nat. Herb. i. 73 (1790), 
_ not DC.— Mexico: without locality, Liebmann, no. 404 (fragment and 
tracing in hb. Gr.); in the Sierra Nevada of northwestern Mexico, 
_ Seemann (hb. Gr.). Jaxisco: roadside between Mascota and San Se- 
 bastian, Nelson, no. 4068. Lower Catirornia, La Paz, Palmer, no. 7 
(coll. of 1890), 
= = Leaves tomentulose beneath. — 
> ML. T. ragulosa, n. sp. Shrub, 10 t0 16 dm. high; branches light 
brown, sometimes inconspicuously winged, the wings narrow, scarcely 
decurrent in pairs from the base of the petiole: leaves 
saee 
