

132 BOTANY OF THE DEATH VALLEY EXPEDITION 



Helianthella argophylla (Eaton) Bot. King Snrv. 423 (1871), under Tithonia; Gray, 

 Proc. Amer. Acad. xix. 9 (1883). Type locality, 1 "St. George, in southern Utah." 



Frutescent perennial, much branched and forming a hemispherical tuft 20 to 

 30 cm. high, rarely simple; stem and branches thick (8 mm. or much more), closely 

 covered with thick leaf-bases; leaves alternate; blades 5 to 10 cm. long, rhombic- 

 ovate, acute, 3-ribbed, tapering into a petiole of the same length, the whole whitened 

 with short, soft, dense, appressed hairs; branches terminating in single, stout, mi- 

 nutely pubescent, nionocephalous, leafless peduncles 30 to GO cm. high; involucral 

 bracts lanceolate, acute, 2 to 3 cm. long, whitened like the leaves; ray-flowers 25 

 to 35, neutral; blade 3.5 to 5 cm. long, lemon-yellow, linear-oblaneeolate, entire or 

 few-toothed at the apex, minutely puhescent on the back; disk 3.5 to 4.5 cm. broad, 

 convex, lemon-yellow; receptacle convex, about 2 cm. broad; hracts of the recepta- 

 cle membranaceous, narrowly oblong, condttplicate, several-nerved, the midrib ex- 

 current at the narrow, often laterally 1-toothed, apex into a blunt point minutely 

 pubescent on its back; corolla about 8 mm. long, with a slender tube 3 mm. long, 

 abruptly expanding into a cylindrical throat with 5 short, spreading, externally pu- 

 bescent teeth; style-tips deltoid-ovate, short-hairy; aehenia tiat-comprcsscd, 9 to 10 

 mm. long, wedge-obovate, convex-truncate at the apex, scantily appressed-puberu- 

 lent; wing thick, spongy, 1 to 2 mm. wide; pappus composed of 2 short, upwardly 

 arcuate-spreading awns, their bases connected by a hardly discernible (in the mature 

 fruit), erose, marginal membrane. 



The species is a very striking one,single plants often bearing thirty open anthodia at 

 one time. Heretofore it has been known only by the scant original material col- 

 lected by Edward Palmer in 1870, ' 2 but we now have it from three additional sta- 

 tions: the gypsum cliffs along the Vegas Wash (No. 411) ; and Surprise and Hall (No. 

 698) canons, Panamint Mountains, near their mouths. The last two stations arc 

 within 4 or 5 miles of each other, the first about 150 miles to the eastward. In all 

 the stations the plant grows upon banks of apparently calcareous clay. 



Leptosyne bigelovii Gray, Pae. R. Eep. iv. 104 (1857), under Pugiopappus; Gray, 

 Syn. Fl. i. pt. ii. 300 (1884). Type locality, "on the Mohave Creek, in the desert 

 east [west] of the Colorado." 



Late in April the lower mountain slopes, within the Larrei belt, between Searlcs's 

 and Mohave, appeared in many places quite yellow with the. flowers of this plant, 

 both close at hand and at a distance of several miles. Specimens were collected on 

 the south slope of Browns Peak (No. 175); in Furnace Creek Canon (No. 400); in 

 Johnson Canon. Panamint Mountains (No. 528); in Shepherd Canon, Argus Moun- 

 tains (No. 742) ; and near Mill Creek Divide (No. 797). 



Madia corymbosa (DC.) Prodr. v. 692 (1836), under Madaria; Greene, Pittonia, 

 ii. 218 (1891). Type locality, "in Amer. bor. occid. ad Columbia-Rivier." 

 Granite Creek, Fresno County, California (No. 1837). Determined by E. L. Greene. 



Madia elegans Lindl. Bot. Reg. xvii. t. 1458 (1831)— Don MS. Type locality, "on* 

 the north-west coast of North America." 



Between Kernville an'd Havilah (No. 1057) and near Mineral King (No. 1468). No 

 1057 is smaller throughout than the typical Madia elegans, but Dr. Gray considered 

 the plant a depauperate form of that species. 



Madia hispida (DC.) Prodr. v. 692 (1836), as Madaria corymbosa kispida; Greene, 

 Pittonia, ii. 217 (1891). Type locality, "in California." 

 Near Fort Tejon (No. 1172). Determined by E. L. Greeno. 



Hemizonia heermanni Greene, Bull. Torr. Club, ix. 15 (1882). Typo locality, 

 " Tehachapi Pass, Kern County [California], near Keene Station, abundant in groves 

 of Querciis flouglanii." 



Near Caliente (No. 1101). 



'Proc. Amer. Acad. viii. 657 (1873). 



•For additional recent notes on this plant, seo Zoo, iii. 304 (1893). 



