ROSE FAMILY. 205 



3. ADENOSTOMA H. & A. 



Evergreen shrubs with somewhat resinous herbage and heath-like foliage. 

 Leaves linear, rigid, entire, small, numerous and mostly fascicled. Flowers 

 small, white, disposed in a terminal and rather close pyramidal panicle, the 

 branches of which are racemose. Calyx obconical, 5-lobed, 10-ribbed, with 

 small bracts at base, the orifice bearing 5 glands. Petals 5. Stamens 10 to 

 M, inserted 2 or 3 together, alternate with the petals. Pistil 1, simple; ovary 

 obovoid, 1-celled; ovules 1 or 2, suspended; style lateral, curved, with an 

 obliquely dilated stigma. Fruit an achene, covered by the indurated calyx- 

 tube. (Greek aden, gland, and stoma, mouth, in allusion to the calyx.) 



1. A. fasciculatum H. & A. Chamise. Spreading bush 2 to 10 ft. high, 

 with virgate branches clothed with leaf -fascicles; leaves linear or rather broad- 

 er towards the apex, 3 to 5 lines long; stipules small, acute; flowers crowded, 

 sessile; calyx 1 line long; petals orbicular, spreading. 



The most abundant and characteristic bush of the higher Coast Eanges 

 and Sierra Nevada, commonly gregarious and occupying (to the exclusion of 

 other shrubs) extensive and especially abrupt slopes and mountain ridges, such 

 vegetation known to mountaineers as "Chamise" or " Greasewood. ' ' It 

 often forms a distinct zone between the foothills and the Yellow Pine belt. 

 June. 



Chamaebatia foliolosa Benth. Mountain Misery. Odorous low shrub 

 1 or 2 ft. high, glandular-pubescent throughout; leaves thrice pinnate with nu- 

 merous minute leaflets ; cymes few-flowered ; petals white, 3 to 4 lines long. — 

 Abundant in the lower part of the Yellow Pine belt in the Sierra Nevada, 

 often covering extensive tracts. Also called Bear-mat, Bear-clover and 

 Tarweed. 



4. CERCOCARPUS HBK. 



Deciduous shrubs or low trees with spur-like branchlets and simple coria- 

 ceous straight-veined leaves. Flowers from winter buds, solitary or fascicled, 

 terminal on the short branchlets. Calyx consisting of a slender pedicel-like 

 tube abruptly expanded into the low-hemispherical deciduous 5-toothed limb. 

 Petals none. Stamens numerous, borne in two or three rows on the calyx. 

 Pistil 1, with a 1-celled ovary, 1 ovule, and a single long style and terminal 

 stigma. Fruit a villous achene enclosed in the persistent calyx-tube and 

 surmounted by the very much elongated twisted soft-hairy style. (Greek 

 kerkis, a shuttle, and karpos, fruit, in reference to the achene and its twisted 

 tail.) 



1. C. parvifolius Nutt. Hard Tack. Spreading shrub 5 to 8 ft. high; 

 leaves obovate, serrate above the middle, cuneate and entire towards the base, 

 not resinous; clusters 2 to 3-flowered. — (C. betulaefolius Nutt.) 



Common chaparral shrub throughout the Coast Eanges and Sierra Nevada. 

 Often called Sweet Brush and also Mountain Mahogany, the wood very hard. 



C. ledifolius Nutt. Mountain Mahogany. Leaves narrowly lanceolate, 

 acute at both ends, entire with revolute margins, glabrate and lustrous above, 

 somewhat resinous, % to 1 in. long; flowers solitary or rarely in 2s. — Sierra 

 Nevada, mostly east slope; Shasta Valley; Southern California. 



5. ROSA L. Rose. 

 Shrubby prickly plants with odd-pinnate leaves and adnate stipules. Flow- 

 ers large, ours mostly pink, solitary or corymbose. Calyx-tube globose or urn- 

 shaped, becoming fleshy in fruit; calyx-limb 5-parted. Bractlets none. Petals 



