(372) 
1. CROSSOSOMA CALIFORNICUM Nutt. Jour. Acad. Phila. II. 1: 50 
1848. 
Type locality: Santa Catalina Island 
Distribution: This insular species has been found on Santa 
Catalina, San Clemente,and Guadalupe Islands, but not on the 
mainland. It is included for comparison and on account of its 
botanical interest. 
2. Crossosoma Bicetovu $8, Wats, Proc. Am. Acad. 11: 122. 
1876. 
Type ee canyons near the south of Bill Williams 
River, W. Arizo 
Distribution: een Arizona and adjacent California 
southward to Lower California. Lower Sonoran. 
Specimens examined: White-water S. B. & W. F. Parish 10 
no locality, Parry &% Lemmon 4; Palm Springs, Parish 4105 
ROSACEAE. Rose Famity. 
Carpels becoming drupelets in fruit 
Receptacle conical; stems prickly. 3. Rubus. 
ptacle flat; stems not prickly. 4. Rubacer. 
ay Becoming ae achenes or 2-seeded follicles 
anthium not fleshy 
sone elongated and plumose in fruit. 
Ca 5-parted; leaves alternate. 
als present; flowers showy, terminal on short or elon- 
gated peduncles; leaves small, lobed. 
Sepals with alternate linear bractlets. 
5. Fallugia. 
Sepals without bractlets. Cowania. 
Petals none; flowers small, axillary; leaves toothed or 
entir erocarpus. 
9. Coleogyne. 
Calyx ee leaves opposi 
Styles not one ng long and oh aa in fruit; petals present. 
Lyonothamnus. 
Leaves opposite. 
ne alternate. 
wers uae te or racemose; leaves simple. 
aves plain, toothed above the middle. 
2. Sericotheca, 
Leaves terete, rarely obscurely toothed 
wldenostoma. 
Flowers corymbose or solitary 
ves 1-5-cleft; flowers solitary. 10. Kunzia. 
