96 DICOTYLEDONOUS PLANTS. 



2. CERASSUS. Juss. 



Drupe, globose or umbilicate at base, fleshy, very smooth, 

 destitute of grey powder ; nucleus subglobose, smooth. 

 (Cherry.) Icosandria. Monogynia. 



* Flowers umbelled ; pedicels \-flowered, arising from the bints. 



1. C.pumila Mich.: striale ; branches virgate ; flowers subumbel- 

 led, peduncled ; calyx short, campanulate ; leaves obovate-oblong, 

 erect, glaucous beneath, serrulate, smooth; fruit ovate. Prunus pu- 

 mila Lam. 



HAB. Banks of streams. Mass, to Virg. May. >>. Shntb 

 2 3 feet high. Fruit small, ovate, red, acid. 



2. C. pygman De Cand. : unarmed ; umbels sessile, few-flowered ; 

 leaves ovate-elliptic, somewhat acute, smooth on both sides^ sharply 

 serrafe, attenuate, with two glands at the base. - Prunus pygmtea Wittd. 



HAB. New-England, N. Y. and Penn. May. J>. Shrub 3 4 

 feet high. Fruit black, of an indifferent taste, and about the size 

 of a large pea. 



3. C.pvbesccns De Cand. : umbels sessile, few-flowered; peduncles and 

 calyx pubescent ; leaves short-oval, serrulate, mostly with two glands 

 at base ; fruit globose. Prunus pubescens Pursh. P. sph&rocarpa Mich. 

 P. liUoralis Big. 



HAB. Sandy shores. N. Eng. Penn. May. *>. Shrub 2 4 

 feet high. Fruit shortly pedunculate, purplish, sour and astrin- 

 gent. The description of Dr. Bigelow's P. littoralis, does not 

 differ materially from the above, except in the fruit, which is 

 large, (sometimes an inch in diameter) globular, eatable, with 

 the flavor of the common plum. It may be distinct. 



Sand Cherries. 



4. C. nigra De Cand. : unarmed ; umbels solitary, sessile, few- 

 flowered ; leaves deciduous, ovate, acuminate, unequally and acutely 

 Berrate, smooth on both sides ; petioles with two glands ; segments of 

 the calyx obtuse, glandular on the margin ; petals obovate. Prurni* 

 nigra Ait. 



HAB. Mountains. Can. N. Y. and N. Eng. June. 1? Shrub 

 68 feet high. 



5. hyemalis Mich. : flowers umbelled, smooth ; segments of the ca- 

 lyx lanceolate ; leaves oblong-oval or oboval, abruptly acuminate ; fruit 

 subovate. 



HAB. Can. Virg. and Car. May, 1?. Fruit small, black, ex- 

 tremely astringent, but eatable in winter. Pursh. 



Black Choke Cherry. 



6. C. depressa De Cand. : branches angular, depressed, prostrate ; 

 umbels few-flowered, sessile, aggregated ; leaves cuneate-lanceolate, 

 remotely serrate, smooth, glaucous beneath ; fruit ovate. C. pumila 

 Mich, not Prunus pumila Linn. P. depressa Pursh, 



