AMYGDALACEAE. 185 



branches and calyx-tube tomentose; calyx-lobes triangular-lanceolate, 

 tomentose on both surfaces, strongly recurved. 



Coniferous forests of the San Gabriel and San Bernardino Moun- 

 tains; Swartout Canyon, San Antonio Mountains. 



Family 47. AMYGDALACEAE. Peach Family. 



Trees or shrubs with alternate deciduous or evergreen 

 usually serrate leaves and white or rose-colored flowers 

 in terminal or axillary racemes or corymbs. Calyx 

 campanulate or turbinate, 5-cleft, deciduous. Petals 5, 

 inserted on the calyx, spreading. Stamens 15-25, in- 

 serted with the petals. Ovaries 1-5, 1-celled, free; 

 ovules 2, pendulous. Fruit a more or less fleshy drupe 

 with a bony stone; seeds 1 or rarely 2. 



Leaves deciduous. 



Flowers corymbose or umbellate. 1. Prunus. 



Flowers racemose. 2. Padus. 



Leaves evergreen; flowers racemose. 3. Laurocerasus. 



1. PRUNUS L. Cherries and Plums. 



Trees or shrubs, with deciduous leaves. Flowers 

 umbellate or corymbose, appearing before or with the 

 leaves mostly on branches of the previous season. Style 

 terminal. Ovary and fruit smooth and glabrous; the 

 stone smooth or slightly roughened, globose, oval or 

 compressed. 



1. P. emarginata (Dougl.) Walp. A shrub, 1-4 m. high, with a 

 smooth dull red bark; leaves ovate or oblong-obovate, finely serrate, 

 2-4 cm. long, on petiole 2-6 mm. long; the blade with 1 or 2 glands 

 at the base; flowers 3-10, in short crymbs; drupes globose, 7-10 mm. 

 long. 



Widely distributed over the Pacific Coast ranging from British 

 Columbia to Arizona; Lytle Creek Canyon, also in the San Bernar- 

 dino and Cuiamaca Mountains. The southern California form has 

 been called Cerasus arida Greene. 



2. PADUS Mill. Choke Cherry. 



Trees or vshrubs, with deciduous leaves and small 

 white flowers in narrow racemes terminating leafy 

 branches of the season. Drupe small, globose, the 

 exocarp fleshy, smooth and glabrous; the stone smooth, 

 small, rounded or oval. m 



