- ■•- 



CATALOGUE OF SPECIES. 91 



The flowers are polygamo-dioecious, a fact which explains Dr. Gray's difficulty 1 in 



identifying Torrey'e plants with others subsequently collected. In the prevailingly 

 male flowers the petals, in our specimens, are elliptical-lanceolate, appressed-stri- 

 gose on the back, 3 to 3.5 mm. long; the filaments 2 mm., and the anthers 1 to 1.2 mm., 

 m length, while the style is 1 to 2 nun. long, and the pistil sterile. In the fertile flowers 

 the petals are ovate, glabrous on the back, 2 to 3 mm. long, the filaments 0.6 to 0.8 mm., 

 the anthers 0.4 mm., and devoid of pollen, andthestyleabout2mm.long. The sterile 

 flower is the one figured by Torrey (loc. cit. pi. v.). The form and length of the 

 petals probably vary considerably. 



The shrub was seen within the yucca belt, between Cajon Pass and Hesperia; on 

 the northeast slope of Lone Willow Peak ; in a canon of the Funeral Mountains, 

 west of Amargosa; near Mountain Springs Pass, in the Charleston Mountains 

 (No. 1881) ; near Cottonwood Springs, Vegas Valley ; on the west slope of the divide 

 northwest of Towner's; in Johnson (No. 555), Willow Creek (No. 767), and Mill 

 Creek (No. 801) canons, Panamint Mountains; and on both slopes of Walker Pass. 

 It grows usually in canons or on rocky slopes, in tlie upper altitudes of the Lower 

 Sonoran zone, and in the lower part of the Upper Sonoran. The fruit resembles a 

 small almond. Dr. Merriam reports the plant from the White Mountains of Cali- 

 fornia; from Mount Magruder, Gold Mountain, the Highland Range, Pahroc Moun- 

 tains, and Juniper Mountains, in Nevada; and the Beaverdam Mountains and upper 

 Santa Clara Valley, Utah. 



Primus ilicifolia (Nutt.) in Hook. & Arn. Bot. Beech. 310 (1840-11), nnder Cerasns; 

 Walp. Kept. ii. 10(1843). Typo locality not given; but the plant was described 

 from specimens collected by Douglas. 



This tree was seen only along the margins of the San Bernardino Valley and on 

 the south Rlope of Cajon Pass (Nos. 45, 114). It is a species belonging distinctively 

 to inrramontane California. 



• Luetkea ceespitosa (Nutt.) in Torr. & Gr. Fl. i. 418 (1840), under Spirma; 

 Kuntze, Rev. Gen. PI. i. 217 (1891). Type locality, "on high shelving rocks in the 

 Rocky Mountains, towards the sources of the Platte." 



A plant undoubtedly referable hero was found in winter on the western slope of 

 the Charleston Mountains, below Clark's sawmill. * 



Basilima millefolium (Torr.) Pac. R. Rep. iv. 83 (1857), under Spirma; Greene,. 

 Fl. Fran. 57 (1891). Type locality, "low hills and valleys, near Williams' moun- 

 tain," Arizona. 



On the summit of Telescope Peak (No. 2038), and on the east slope of the Pana- 

 mint Mountains, near Johnson Canon, at 2,620 meters; in Wood Canon, Grapevine 

 Mountain, (No. 1758); in the Beaverdam Mountains, Utah (Merriam) ; and along the 

 Hockett Trail, on the eastern slope of the Sierra Nevada, at 2,350 meters. 



Holodiscus discolor (Pursh) FL i. 342 (1814), under Spirma; Maxim. Adn. Spir. 

 257 [150J (1879). Type locality, " on the banks of the Kooskoosky," a river in Idaho, 

 now known as the Clearwater. 



The plant here referred to is a bushy shrub 0.8 to 1.5 meters high, with leaves not 

 exceeding 2 cm. in length. It is called in the Botany of California Spirma discolor 

 dumosa, and is undoubtedly the same as S. dumosa Hooker- the type specimens of 

 which were collected by Geyer in "stony and sandy places of Platte River." Some 

 doubt has existed, however, whether Pursh's plant was really this or the Spirma 

 arimfolia of Smith. 3 This doubt was expressed at one time by Gray/ while speaking 

 of the so-called S. damom, as follows: "This is * * * a good species; but the 

 original 8. discolor, Pursh, I believe to be only S. arimfolia; as certaiuly is a plant of 



'Proe. Amer. Acad. x. 70 (1874). s Rees, Cycl. xxxiii JS19). 



* Lond. Journ. Bot. vi. 217 (1847)— Nutt. MS. "Gray, PL Fendl.40 (1849). 



