ROSE FAMILY 
93 
1. A. fasciculatum H. & A. Chamise. Plants 6 to 28 dm. high, the 
virgate branches clothed with leaf clusters; leaves 6 to 10 mm. long.— 
Gregarious and exclusively occupying extensive slopes and mountain 
ridges. 
9. OSMARONIA Greene 
Shrubs with simple entire leaves. Stipules caducous. Flowers white, 
fragrant, in nodding racemes terminating leafy branchlets, the pistillate 
and the staminate on separate plants. Petals erect in the pistillate flower, 
spreading in the staminate. Stamens 15, in 3 rows. Pistils 5, becoming 
drupes. (Osme, Greek adjective meaning fragrant, and Aronia, a genus 
founded by Persoon and now referred to Amelanchier.) 
1. O. cerasiformis (T. & G.) Greene. Oso Berry. Shrub 8.6 to 25 
dm. high; leaves glabrous, broadly oblong, acute at each end, 3.6 to 6 
cm. long when mature; petals 4 to 6 mm. long; drupes 1 to 5, blue-black, 
bitter.—Coast Range hills. 
10. PRUNUS L. 
Trees or shrubs with simple serrate leaves. Flowers white or pink, in 
clusters. Calyx deciduous after flowering. Stamens 15 to 30. Pistil 1, 
becoming a globose, ovoid or oblong drupe. (The Latin name of the 
plum.) 
Leaves conduplicate in the bud. 
Drupe soft-hairy or downy; stone furrowed or pitted. 
Flowers white; fruit with dry flesh.1. P. communis. 
Flowers pink ; fruit with thick edible flesh.2. P. persica. 
Drupe glabrous, without bloom; stone globose, smooth. 
Flowers in short corymbs or lateral clusters. 
Tree; pulp of drupe not bitter.3. P. avium. 
Shrub ; pulp of drupe bitter.4. P. emarginata. 
Flowers in racemes. 
Peduncle leafy; drupe small; its flesh astringent; foliage deciduous.... 
5. P. demissa. 
Peduncle leafless; drupe large, its flesh sweetish; foliage evergreen... 
6. P. ilicifolia. 
Leaves convolute in th^ bud; stone compressed, smooth or nearly so; flowers 
white. 
Flowers in clusters ; drupe with a bloom. 
Tree ; leaves ovate or obovate, 4.8 to 7.2 cm. long.7. P. domestica. 
Shrub ; leaves round to ovate, 1.8 to 4.8 cm. long.8. P. subcordata. 
Flowers solitary or in twos; fruit pubescent or glabrous.9. P. armeniaca. 
1. P. communis Frit. Almond. Tree ; leaves lanceolate, closely ser¬ 
rate; fruit with a dry flesh which at length separates from the softish 
stone.—Cult, from Asia. The more important horticultural varieties in 
Cal. are Nonpareil, Ne Plus Ultra and I X L. 
2. P. persica Sieb. & Zucc. Peach. Tree; leaves broadly or oblong 
lanceolate, serrate; stone deeply pitted and very hard.—Cult, from Persia, 
some of the commoner varieties being the Alexander, Crawford, Muir, 
Salway, Foster and McKevitt Cling. 
3. P. avium L. Common Cherry. Tree; leaves ovate or obovate, 
short-pointed, glossy above; drupe roundish.—Cult, from Eur. The most 
common varieties are Black Tartarian, Royal Ann and Napoleon Bigar- 
reau. 
4. P. emarginata Dougl. Bitter Cherry. Shrub 1 to 3 m. high; 
