. 



126 BOTANY OP THE DEATH VALLEY EXPEDITION. 



Aster mohavensis. 



This shrubby desert Aster was first described by Gray l as Aplopappus tortifolius, but 

 subsequently referred by the same author 3 to Aster. It cannot, however, retain its 

 original specific name, since Michaux 3 described an Aster tortifolius which is now 

 referred to Serieocarpns tortifolius. 



The plant occurred on the south slope of Browns Peak (No. 184) ; on Lone Willow 

 Peak, at 1,825 meters; in the mountains east of Resting Springs, from 750 to 1,050 

 meters; in the northern end of Resting Springs Valley, at 930 meters; on the west- 

 ern slope of the Charleston Mountains, at 900 and 870 meters; in the Funeral Moun- 

 tains, west of Ainargosa, from 975 to 1,575 meters ; near Devil Hole, Ash Meadows ; on 

 the eastern slope of the Charleston Mountains, at 945 meters; in Vegas Valley, at 885 

 meters; in Furnace Creek Canon, at 720 meters (No. 358); in Johnson Canon, Pana- 

 mint Mountains, at 1,700 meters; in Willow Creek and Mill Creek canons, Panamint 

 Mountains; at the western foot of the Inyo Mountains near Swansea (No. 863); 

 between Keeler and Crystal Spring, Coso Mountains; in Shepherd Canon, Argus 

 . Mountains (No. 732); at several points between Lone Pine and Haway Meadows; 

 and in Antelope Valley. The plant is characteristic of the upper altitudes of the 

 Lower Sonoran zone. 



Erigeron armerifolius DC. Prod. v. 291 (1836). Typo localities, "in uliginosis 

 subsftlsis prope Ircutiam in Dahuria" and "in descrto Kuraico." 

 In Lyon Meadow, Sierra Nevada (No. 1578). 



Erigeron breweri Gray, Froc. Amer. Acad. vi. 541 (1885). Type locality, " Yosem- 

 ite Valley [California] ; alt. 4,000 feet." 

 At Soda Springs, Sierra Nevada (No. 1604). 



Erigeron calvus Coville, Proc. Biol. Soc. Wash. vii. 69 (1892). Type locality 

 as given below. 



"Apparently biennial, widely branching from the base, 1 cm. high, sparingly 

 canescont with hirsute pubescence; radical leaves very numerous, blade oblong to 

 obovate, 1 to 1.5 cm. long, tapering into a petiole of twice that length ; upper leaveB 

 spatulate, becoming much smaller; heads singly pedunculate on the branches, 7 

 to 8 mm. high, hemispherical, with very many flowers; involucral bracts narrowly 

 linear, acuminate, hirsute; ray llowers numerous, but with rays minute, pink, and 

 shorter than the disk; pappus of ray and disk flowers alike, consisting of several 

 long, stout, closely barbellate bristles (4 mm. long), equaling the disk corollas, and 

 a few intermediate, much shorter ones; achenium compressed, Bhort villous. 



"This species resembles in general appearance no described Erigeron. Its heads 

 closely resemble those of E. supplcx, but that species has no ray flowers whatever. 

 Its pubescence is similar to that of E. coitcinnus. The specific name refers to the 

 bald appearance of the heads, due to the minuteness of the rays. 



"Type specimen in the United States National Herbarium, No. 870, Death Valley 

 Expedition; collected May 16, 1891, at the foot of the Inyo Mountains, about 4 miles 

 north of Keeler, California, by Frederick V. Coville." 



Erigeron canadensis L. 8p. PI. h. 863 (1753). Type locality, "in Canada, Vir- 

 ginia, nunc in Europa australi." 

 On the North Fork of Kern River (No. 1723). 



Erigeron compositus Pursh, Fl. ii. 535 (1814). Type locality, "on the banks of 

 the Kooskoosky," now the Clearwater, in northern Idaho. 



At Farewell Gap (No. 1576), and near Mount Whitney (No. 2062). 



1 



'Bost. Journ. Nat. Hist. v. 109(1845). 

 *Proc. Amer. Acad. vii. 353 (1868). 

 »Mx. Fl. ii. 109 (1803). 



