12 PROCEEDINGS OF THE AMERICAN ACADEMY. 
T. angustifolia, Gray, Pl. Wright, i. 128 (1852), & ii. 102 (as to 
nos. 413 & 1299), also Syn. Fl. i. pt. 2, 409, in part, not DC. 7. an- 
gustifolia, var. latiuseula, Gray,1. ¢: 410. 7. frutescens, Gray, Bot. 
Mex. Bound. 103 (1859), vars. ; not Sch. Bip. in Seem. Bot. Herald, 314; 
not P. Browne. — Catirornia: San Diego County, Tantillas Cafon, 
Palmer (coll. of 1875); Colorado Desert, Lemmon & Parry, no. 1185, 
Wright, no. 196; Agua Caliente, Parish, no. 353 (hb. Gr.). Lower 
Carirornia: Cedros Island, Veatch, Greene (hb. Gr.), Palmer, no. 694 
(hb. Gr.), Anthony, nos. 49, 318 (both in hb. Gr.); Island of San 
Pedro Martin, Palmer, no. 408 (hb. Gr.); Magdalena Island, Bran- 
degee (hb. Gr.); Cafions Cantillas, Oreutt, no, 1102, ARIZONA: 
rocky cafions of the Santa Catalina Mountains, Pringle (hb. Gr.); 
Camp Grant, Palmer, no. 143 (hb. Gr.) ; Tempe, Ganong & Blaschka 
(hb. Gr.); without locality, Lemmon (hb. Gr.) ; Tucson, Greene, no. 
1099 (hb. Gr.); Grand Cafion, Gray (hb. Gr.). New Mexico: 
Manyos Cajion, Greene, no. 101 (hb. Gr.); Bear Mountains, Ausby, 
no. 203 (hb. Gr.); Organ Mountains, Wooton, no. 107. (hb. Gr.). 
-Texas: western part, Havard, no. 74 (bb. Gr.). Sonora: ravines 
near Santa Cruz, Wright, no. 1299 (hb. Gr.) Caimvanua: among 
rocks, Bachimba, Thurber, no. 830 (hb. Gr.); hills near the city, Prin- 
gle, no. 30 (hb. Gr.) ; Santa Eulalia Mountains, Pringle, no. 525 (hb. 
Gr.); near Lake Santa Maria, Nelson, no. 6407 (hb. Gr,). Coanvrta: 
Soledad, Palmer, no, 2089 (hb. Gr.); Parras, Palmer, no. 745 (hb. 
Gr.) ; Torreon, Palmer, no. 786 (hb. Gr.). San Luis Porosi: near 
Opito, Gregg (hb. Gr.). , 
14, T. silvatica, n.sp. Branching shrub with light brown branch- 
lets; cortex tending to exfoliate: leaves thin, ovate-oblong, acuminate, 
cuneate at the sessile base, sharply but rather finely dentate, green, 
_ slightly pubescent and obscurely glandular above, scarcely paler, finely 
_. pubescent and distinctly glandular-atomiferous beneath, 5 to 8 cm. long, 
2 to 3 cm. broad: heads few or many at the ends of the branches in 
rounded corymbose panicles, about 12-flowered, 2 cm. long in fruit; outer 
_ involucral bracts thin, lanceolate or oblanceolate, acuminate, glandular- 
atomiferous, 12 to 15 mm. long, 3 to 5 mm. broad, the inner 8, linear, 
short-acuminate, about 12 mm. long, glandular-pubescent: mature achenes 
7 to 9 mm. long; pappus slightly tawny, about 8 mm. long. — Oaxaca: 
in dry wooded gorges on the River Tehuantepec, O. § EL. Seler, no. 1633 
(hb. Gr.); without locality, Liebmann, vo. 405 (hb. Gr.). — Distin- 
guished from the preceding species by its thinner larger leaves, the spread- 
ing villous pubescence of the inflorescence, and by the shorter pappus. 
