DICOTYLEDONOUS PLANTS 87 



c. R. vitifolius Cham. & Schl. Blackberry. Stems trailing, 

 very prickly. Leaves compound with 3-5 leaflets ; the veins beneath, 

 the leafstalks, peduncles, and sepals prickly. Flowers white, a 

 half inch in diameter. Fruit black iclien ripe, oblong, sweet. Widely 

 distributed. 



d. R. leucoder'mis DougL* Shrub with ascending and recurved 

 stems, 3-5 ft. long, pale green, prickly. Leaves with S-Jf, leajiets, 

 ivhich are ovate-lanceolate, pointed and doubly serrate, pale green on the 

 lower surface. Flowers few. Sepals narrowed to a long point, sur- 

 passing the white petals. Fruit black, generally covered with a bloom. 

 This is found from northern California to Washington. 



XII. RO'SA, Wild Rose 



Prickly and thorny shrubs. Leaves pinnately compound, 

 leaflets serrate, stipules adnate to the petiole. Recej^tacle 

 globose, contracted at the throat. Calyx of 5 divisions, with- 

 out bractlets. Petals 5, rose-color. Stamens many, near the 

 mouth of the receptacle. 



a. R. Califor'nica Cham. & Schl. Stems with stout recurved thorns. 

 Leaflets 2-3 pairs. Flowers in corymbs or rarely solitary. Fruit 

 generally with a distinct neck beneath the spreading calyx lobes. 

 This is widely spread throughout California, usually growing near 

 streams. 



b. R. gymnocar'pa Nutt. Redwood Rose. Slender shrub cov- 

 ered with numerous straight prickles. Flowers generally solitary, 

 less than an inch in diameter. Calyx lobes genercdly falling from 

 the fruit. Pedicels, petioles, and stipules glandular. This dainty 

 rose grows in the shade of trees or bushes, usually under the 

 redwoods. 



Suborder III. — POME^ 



Trees or shrubs with stipules not attached to the petiole. 

 Carpels 2-5, enclosed in and attached to the fleshy recep- 

 tacle, becoming a fruit like an apple, of which the core is the 

 ovary, and the fleshy part the receptacle (pome). Ovules 

 2 in each cell. 



I. AMELAN'CHIER, Service Berry, June Berry 



Shrub or small tree with deciduous leaves. Flowers large, 

 white, in racemes. Ovary 5-celled, becoming a part of the 



