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138 BOTANY OF THE DEATH VALLEY EXPEDITION. 



This Artemisia, which is not a characteristic desert species, was found along water 

 courses in Willow Creek Canon, Panamint Mountains; near Lone Pino; along 

 Calieute Creek; and near Visalia (No. 1263). 



Artemisia rothrockii Gray, Bot. Cal. i.618 (1876). Type locality, "Sierras of 

 Tulare Co., Olacbe Mountains and Monachy Meadows, at 8,000 to 9,300 feet." 



In Whitney Meadows, Sierra Nevada (No. 1684j. In our specimens the leaves are 

 narrower than those of the type. 



Artemisia spinescens Eaton in Wats. Bot. King Surv. 180 (1871). Typo 

 locality, 1 " Kocky Mountain plains, in arid deserts, towards the north sources of the 

 Platte." 



The plant was first described by Nuttall, under the name Ptcrothamnus descrtorum, 

 and afterwards referred by Eaton to its present genus. The original specific name 

 could not be retained, as there is already an Asiatic Artemisia desertorum. 



This shrub occurred in abundance at i\p point in the region traversed by the 

 writer. It was found in Surprise Canon (No. 61 4) and Mill Creek Gallon, Panamint 

 Mountains; near Crystal Spring, Coso Mountains ; and along the west shore of Owens 

 Lake. At all these points it occurred near the line between the Upper and Lower 

 Sonoran zones. Farther east and north it was found by Dr. Merriam in many locali- 

 ties, as follows: Deep Spring Valley; between Wild Rose Spring and Emigrant 

 Canon, Panamint Mountains; Fish Lake Valley; between Mount Magruder and 

 Gold Mountain; Grapevine Canon; Sarcobatus Flat; Oasis Valley; Emigrant Val- 

 ley; Timpahute Valley; Pahranagat Valley; Desert Valley; and Meadow Creek 

 Valley. 



Artemisia tridentata Nutt. Trans. Amer. Phil. Soc. new ser. vii. 398 (1841). 

 Type locality, "plains of the Oregon, and Lewis' River." 



This shrub, the true sage brush, occurs in the Upper Sonoran and Transition zones 

 throughout the mountains of the desert region. Dr. Merriam, in his report, has 

 written a detailed account of its distribution. Along the. western slope of the Sierra 

 Nevada it was found in the Transition zone on Frazier Mountain, on the west slope 

 of Tejon Pass, and near Mineral King. 



Peucephyllum schottii Gray in Torr. Bot. Mex. Bound. 74 (1859). Type locality, 

 "diluvial banks of the Colorado, in Sonora." 



The pappus of this species, although invariably described as composed of capil- 

 lary bristles, nearly always shows some of the larger bristles flattened, and in No. 

 207, Palmer, 1890, from Santa Rosalia, Lower California, these bristles, as has been 

 pointed ont,' 2 are still further expanded into well-developed palese. 



The shrub is a very handsome and interesting one, its vegetation (of a much more 

 brilliant green than that of Larrea) and its rounded, symmetrical form making a 

 very striking figure in the usually sombro vegetation of the desert. From the speci- 

 mens of the early collections the plant was not definitely known to be a shrub. It 

 has, however, a well-defined trunk, which frequently attains a diameter of 7.5 to 

 10 cm. In the Funeral Mountains the shrub seemed to attain its most perfect 

 development. In a canon on the west slope of this range, opposite Bennett WeJls, Mr. 

 Bailey and I used its dead trunks for firewood, and found them of excellent quality. 

 In a great wash in the interior of the same range, on the 21st of February, Mr. 

 Fnnston and I saw many largo, beautiful specimens of the plant, one of them with 

 a trunk that I estimate to have been 18 or 20 cm. thick at the base. 



In addition to the localities mentioned, the plant occurred on the south slope, of 

 Browns Peak (No. 171) ; in Furnace Creek Canon (Nos. 355, 457) ; in the south end 

 of the Funeral Mountains, near Saratoga Springs, and in a canon west of Amargosa; 



'Trans. Amer. Phil. Soc. new ser. vii. 417 (1841). 

 9 Contr. Nat. Herb. i. 84 (1890). 



