388 LILIACEAE 



19. Allium platycaule S. Wats. Broad-stemmed Onion. Fig. 947. 



Allium l^latycaule S. Wats. rroc. Am. Acad. 14: 234. 1879. 



Bulb ovoid, 20-25 mm. long, the outer coats dark 

 gray, without reticulations, the inner white. Scape 

 10-15 cm. high, flattened, 3-5 mm. wide ; leaves usu- 

 ally 2, exceeding the scape, falcate, 10-20 mm. wide ; 

 bracts 3 or 4, connate at base, ovate-lanceolate, long- 

 acuminate, 20 mm. long; umbels compact, 30-90- 

 flovvered, the pedicels 15-20 mm. long; perianth rose, 

 10-14 mm. long, not saccate at base, the segments 

 very narrow, long-acuminate from the base; stamens 

 equalling the perianth-segments; anthers purple, 1.5 

 mm. long; style 8-10 mm. long; ovary distinctly 3- 

 lobed, without crests. 



Sub-alpine meadows, Canadian Zone; Warner Mountains, 

 Modoc County, California, and the Sierra Nevada from Plumas 

 to Placer Counties. Type locality: high mountain valley of 

 Plumas County. 



20. Allium burlewii Davidson. 

 Burlew's Union. Fig. 948. 



Allium burlewii Davidson, Bull. S. Calif. Acad. 15: 17. 1916. 



Bulb ovoid, about 15 mm. long, the outer coats gray- 

 brown, without evident reticulations, or with obscure rect- 

 angular meshes. Scape 2-7 cm. high, somewhat flattened and 

 2-edged ; leaf solitary, flat, well exceeding the scape, 3-6 mm. 

 wide, bracts 3. ovate, abruptly short-acuminate or merely 

 mucronate ; umbels many-flowered ; pedicels slender, 15-25 

 mm. long ; perianth not saccate at base, the segments narrow- 

 ly oblong-lanceolate, obtuse, 8-10 mm. long, rose purple with a 

 conspicuous dark midvein; stamens equalling or slightly ex- 

 ceeding the segments ; anthers purple ; capsule with 6 low 

 crests. 



Granitic gravel, Canadian and Transition Zones; southern Sierra 

 Nevada (Kern County) and Mount Pinos to the San Jacinto Mountains, 

 California. Tvpe localitv: Mount San Antonio, San Gabriel Mountains. 



21. Allium obtusum Lemmon. 

 Red Sierra Onion. Fig. 949. 



Allium obtusum Lemmon, Pittonia 2: 69. 1890. 



Allium concinnum K. Brandg. ; M. E. Jones, Contr. West. Bot. 



10: 86. 1902. 

 Allium parvum briicae M. E. Jones, Contr. West. Bot. 10: 



12, fig. 16. 1902. 



Bulb ovoid, 12-18 mm. long, the outer coats red- 

 dish brown, with line rectangular reticulations. 

 Scape 4-8 cm. high, terete or slightly compressed 

 above; leaf solitary, flat, well exceeding the scape, 

 5-8 mm. broad; bracts 3, broadly ovate, acuminate^ 

 15 mm. long; umbels many-flowered; pedicels 10-15 

 mm. long; perianth-segments dark rose-purple, ob- 

 long-ovate, obtuse, 8-10 mm. long; stamens about 

 two-thirds the length of the segments ; anthers yel- 

 low ; capsule with 6 low crests. 



In granitic or clay soils, Canadian and Arid Transition 

 Zones; Sierra Nevada, California, from Plumas County to the 

 Tehachapi Pass; also San Jacinto Mountains. Type locality: 

 "sub-ali)ine region of Gold Lake, Plumas County." 



