(373 ) 
Leaves 3-pinnate; flowers corymbose. 
11. Chamaebatia, 
Hypanthium fleshy, becoming bright-colored and pome-like in fruit. 
12. Ros 
1. LYONOTHAMNUS. 
1. LyonoTrHamMNus FLoripuNDUs A. Gray, Proc. Am. Acad. 20: 
292. 18865. 
Lyonothamnus asplenifolius Greene, Bull. Calif. Acad. 1: 187. 
188 
Type locality: “Santa Catalina Island.” 
Distribution: This monotypic genus is restricted to the islands 
off the coast of southern California, where it has been found on 
Santa Cruz, Santa Catalina, and San Clemente. Although this 
species has not been found on the mainland it is included on 
account of its botanical and horticultural interest. 
z. SERICOTHECA. 
Inflorescence ample, well-compound; leaves 3-6 cm. long. 1. S. franciscana, 
Inflorescence small and narrow, simple, racemose, or with a few short branches; 
leaves 1-1.5 cm. long. 2. S. concolor. 
I. SERICOTHECA FRANCISCANA Rydb. N. Am. Fl. 22: 262. 1908. 
Type locality: “San Leandro, California.” 
Distribution: Coast Ranges of central California southward to the 
vicinity of Los Angeles. Humid Transition and Upper Sonoran. 
Specimens examined: Griffith Park, near Los Angeles, Braunton 
62. 
2. SERICOTHECA concoLor Rydb. N. Am. Fl. 22: 264. 1908. 
Spiraea discolor dumosa S. Wats. Bot. Calif. 1: 170. 1876, in part. 
Holodiscus discolor dumosa 8. Wats.; Abrams, Fl. Los Angeles 
196. I904. 
Type locality: “Mt. Davidson, Nevada.” 
Distribution: Western Nevada and adjacent California, south- 
ward through the higher mountains of southern California. Can- 
adian Zone. 
Specimens: Mount Pinos, on the summit, dbrams & McGregor 
234; Mount San Antonio, near the summit, Abrams 1917; Green 
Valley, San Bernardino Mountains, Hall 13z1; near the summit 
of Mount San Gorgonio, Abrams F McGregor 756; Tahquitz Valley, 
San Jacinto Mountains, Wall 2465 
