ROBINSON AND GREENMAN. — TRIXIS. 11 
lanceolate, 3 to 8 em. long, 7 to 17 mm. broad, acuminate, acute, entire, 
narrowed at the base, dark green, sparingly pubescent and rugose above, 
paler and finely tomentose beneath: inflorescence an open flat-topped 
panicle ; pedicels appressed-pubescent ; bracts of the outer involucre 7 to 
8 mm. long, the inner narrowly oblong, obtusish, 10 to 12 mm. long; 
heads 1.5 to 2 em. high, about 18-flowered. Mexico: without locality, 
Gregg, no. 840 (hb. Gr.). Guanasuarto: alt. 2100 m., C. C. Deam, 
no. 175 (hb. Gr.) QuERETARO: in the plains near the city, Berlandier, 
no. 1292 (hb. Gr.) ; between Queretaro and Mexico, Berlandier, no. 1228 
(hb. Gr.). 
> 12. T. angustifolia, DC. Shrub, about 1 m. high, fasciculately 
branched, grayish green: leaves linear or lance-linear, attenuate at each 
end, 3 to rarely 9 cm. long, usually about 4 (rarely as much as 15) mm. 
broad, hirsute-tomentose beneath, mostly erect or appressed, the upper- 
most shorter but otherwise similar; margins strongly revolute: heads 
about 2 cm. long, subsolitary or aggregated into fascicles ; scales of the 
inner involucre 8, lance-linear, attenuate. — Prodr. vii. pt. 1, 69 (1838) ; 
Hemsl. l. c. 258; Gray, Syn. FI. i. pt. 2, 409, in part. Z. rosmarini- 
folia, Nees, Linnaea, xx. 699 (1847); Walp. Ann. i. 460.— Mexico: 
without further locality, Gregg, no. 566; in the Sierra Nevada of north- 
west Mexico, Seemann, no. 2046 (hb. Gr.). Duraneo: shady hillsides 
near the city, alt. 1850 m., Palmer, no. no. 30, Nelson, no. 4599. ZacaTe- 
cas: hills about the city, Pringle, no. } no. 180. San Lurs Porost: Berlan- 
dier, nos. 1284, 1353 (both in hb. Gr.), alt. 1800 to 2500 m., Parry & 
Palmer, no. 549 (hb. Gr.), Schaffner, no, 285 (hb. Gr.); Penasco, C. § 
. Seler, no. 1138. 
= = = Leaves glandular-dotted beneath. 
_J 18. T. californica, Kettoce. A much branched shrub, 0.3 to I m. or 
more in height; branches and branchlets appressed-puberulent, glabrate : 
leaves lanceolate, 2.5 to 10 cm. long, 0.5 to 2 cm. broad, acute or acu- 
minate, entire or mucronulate-dentate, sessile or narrowed below to a 
subpetiolate base, sparingly appressed-puberulent on both surfaces to 
nearly or quite glabrous, densely glandular-atomiferous beneath, usually 
pale green: heads 1.5 to 2 em. high, commonly 12-14-flowered; inner 
involucral scales 8 to 10 in number, 10 to 15 mm. in length, thickened 
and somewhat obtusely keeled at the base, slightly exceeding the lance- 
linear to subobovate outer bracts, glandular-pubescent with a few sub- 
appressed non-glandular hairs intermixed. — Proc. Calif. Acad. ii. 182. 
‘: 53 (1862). TZ. suffruticosa, Wats. Bot. Calif. ii. 459 (1880). 
