

140 . BOTANY OF THE DEATH VALLEY EXPEDITION. 



red to S. hufcns hookeri. This variety was afterwards included by Gray in the type 

 form of 8. luijcns. 



Senecio mohavensis Gray, Syn. El. i. pt. ii. 454 (1884). Typo locality, "S. E. 

 California, in the Mohave region, near the Colorado." 

 Hall Canon, Panamint Mountains (No. (597). 



Senecio serra Hook. Fl. I5or. Amer. i. 883 (1834). Type locality, "on the hanks 

 of the Wallawallah, Flathead, and Spokan Kivers." 

 Near Mineral King (No. 1466). 



Senecio triangularis Hook. Fl. Bor. Araor. i. 332 (1834). Type locality, "moist 

 prairies among the Rooky Mountains." 

 In the valley of Kaweah Pivcr (No. 1330). 



Senecio werneriaefolius Gray, Proe. Acad. Phila. 1863, 68 (1863), as 8. aureus 

 wernerur/olius; Gray, Proc. Amor. Acad. xix. 54 (1883). Type locality, "the Pocky 

 Mountains, in Colorado Territory." 



In the high Sierra Nevada (Nos. 1662, 2052). 



Lepidospartum squamatum Gray, Proc. Amer. Acad. viii. 290 (1870), under 

 Linosyris; Gray, Proc. Amer. Acad. xix. 50 (1883). Type locality, "low hills of the 

 Sierra Santa Monica, Los Angeles Co., California." 



The distribution of this shrub is singular. As seen by the expedition, it occurred 

 along the southern and western border of the Mohave Desert, entering it along cer- 

 tain sandy, dry washes and extending into the intramontano region in similar situa- 

 tions. It was found in the bed of Lytle Creek, near San Bernardino (No. 18)- 

 along the Mohave River at Daggett; in dry washes at the eastern base of the south- 

 ern Sierra Nevada, near Indian Wells and Walker Pass; at several points along our 

 route from Walker Pass to Tehachapi, by way of Kernville, Havilah, and Caliente; 

 and near the mouth of TehachaprCanon. 



Lepidospartum striatum Coville, Proc. Biol. Soc. Wash. vii. 73 (1892). Type 

 locality as given below. Plate XI. 



" Shrub 1 to 1.6 meters high, with a stout erect trunk; branches numerous, erect, 

 striate-angled by 3 ribs decurrent from eacli leaf-base, closely white-tomentose, the 

 ribs resiniferous and glabrous; leaves alternate, filiform-linear, thicker above, acute, 

 slightly spreading, 20 to 25 mm. long, or the upper only 10 mm.; heads 2 to 5 at 

 the apex of the branch, singly sessile, or very short-peduncled, in the axils of leaf- 

 like bracts, 12 to 16 mm. long; involucre oldonjj to narrowly oblong, 7 to 10 mm. 

 high; bracts about 9, broadly ovate to narrowly oblong, obtuse, stiff, coriaceous, 

 with narrow membranaceous margin, lanate on the back, imbricated, the outer suc- 

 cessively shorter; flowers 5; corolla lobes linear-lanceolate, acute, longer than the 

 throat, with marginal nerves and an ohlong or linear resin duct at the apex; anthers 

 acutely sagittate at the base; anther-tips obtuse; styles 2 to 2.5 mm. long, linear, 

 bluntly acute, but short-hairy so as to appear obtuse; achenium densely villous 

 with spreading long white hairs; pappus copious, white, of conspicuously scabrous 

 soft bristles. 



"This plant has the general appearance of a Tetradymia, but the involucre and 

 style-tips of Lepidospartum. The branches resemble those of T. glabraia, except 

 that the decurrent leaf-base is made up of three sleuder ribs instead of one broad 

 line. The leaves, too, are very similar to the primary ones of that species. The in- 

 volucral bracts arc thoroughly imbricated, and in this respect are quite different 

 from those of any Tetradymia; yet their texture and pubescence are the same. The 

 pappus and achenia closely resemble those of T. glabrata and T. cancscena inermis. 

 The median nerve of the corolla lobes in Tetradymia and in Lepidospartum squama- 

 tum, which are really resin ducts, are here reduced to large linear or oblong apical 

 resin glauds not produced to the base of the lobe. The anther tip is really acute, 



