92 
ROSACEAE 
long; cymes rather crowded; petals obtuse, Vs longer than sepals; alter¬ 
nate filaments larger.—Coast, Santa Cruz Co. to Santa Barbara Co. 
6. ROSA L. Rose 
Shrubby prickly plants with pinnate leaves and adnate stipules. Flowers 
large, ours mostly pink, solitary or corymbose. Calyx-tube globose or 
urn-shaped, becoming fleshy in fruit and termed a ‘‘hip.” Petals rounded, 
inserted with the numerous stamens on the edge of the thin disk which 
lines the calyx-tube and bears toward the base the many pistils. Pistils 
becoming achenes. (The Latin name.) 
Prickles slender and straight or none; calyx-lobes at length deciduous from the 
hip: flowers small ...1. R. gymnocarpa. 
Prickles stout, recurved ; calyx-lobes persistent on the hip ; flowers large. 
2. R. californica. 
1. R. gymnocarpa Nutt. Wood Rose. Slender bush, 2.8 to 8.6 dm. 
high, glabrous; leaflets 5 (or 3), elliptic, 6 to 18 mm. long, doubly ser¬ 
rate, the minute teeth gland-tipped; flowers solitary (or in clusters of 2 
or 3) ; corolla 14 to 20 mm. broad; hips ovate or pear-shaped, 8 to 14 
mm. long.—Wooded canons. 
2. R. calif ornica C. & S. California Wild Rose. Stoutish shrub 8.6 
to 17 dm. high; prickles mostly in pairs below the leaves; leaflets 5 or 7, 
ovate or elliptic, 1.8 to 3.6 cm. long; flowers in corymbs; corolla 2.4 to 3 
cm. broad; hips ovate-globose, 1.2 cm. long.—Stream banks or moist 
valleys. 
7. CERCOCARPUS H. B. K. 
Shrubs with the flowers solitary or in clusters on short branchlets. 
Calyx-tube slender and stalk-like, surmounted by the low-hemispherical 
calyx-limb which is at length deciduous. Petals none. Stamens numer¬ 
ous, in 2 or 3 rows. Pistil 1, with a long style. Fruit an achene, en¬ 
closed in the calyx-tube and bearing the twisted tail-like soft-hairy style. 
(Greek kerkis, a shuttle, and karpos, fruit, in reference to the achene and 
its twisted tail.) 
Leaves cuneate-obovate, toothed ; flowers 2 to 5 in a cluster.1. C. betuloides. 
Leaves narrowly lanceolate, obovate, entire; flowers solitary or in pairs. 
2. C. ledifolius. 
1. C. betuloides Nutt. Mountain Mahogany. Shrub or small tree, 
1 to 4 m. high; leaves half leathery, serrate above the middle, conspicu¬ 
ously feather-veined; calyx-tube in fruit 1.2 cm. long, reddish-brown, con¬ 
tracted above; achene leathery, the tail 7.2 long or less.—Middle and 
high elevations in the mountains. 
2. C. ledifolius Nutt. Desert Mahogany. Shrub or small tree, 2 to 
5 m. high; leaves coriaceous, glabrous above at maturity, pubescent below, 
1.2 to 2.4 cm. long, veins obscure.—Desert slopes. The wood is very hard 
and close-grained and is used for tool handles and machine bearings. 
8. ADENOSTOMA H. & A. 
Shrubs with somewhat resinous herbage. Leaves linear, rigid, entire, 
small, numerous and mostly in clusters. Flowers small, white, disposed 
in a panicle of racemes. Calyx 10-ribbed. Petals rounded. Stamens 
10 to 15. Pistil 1. Ovary 1-celled. Fruit an achene. (Greek aden, gland, 
and stoma, mouth, in allusion to the calyx.) 
