LEGUMINOSAE (PULSE FAMILY) 499 



glabrous ; leaves spatulate-oblong or more rarely lance-oblong, obtuse or acute, 

 serrate above the middle, entire toward the cuneate base, pale beneath ; flowers 

 2-4 in a fascicle ; fruit globose, without bloom, nearly black, about 1 cm. 

 in diameter. (P.pumila, var. Bailey.) Thickets, sandy soil, s. Me. to N. C. 

 and Minn. 



11. P. pumila L. (SAND C.) Prostrate, spreading and creeping ; leaves 

 linear-spatulate to oblanceolate, usually acute or acutish, pale beneath, sub- 

 entire or toothed above the middle ; flowers as in the preceding ; fruit globose, 

 pendulous, dark claret-color, without bloom, about 1 cm. in diameter. 

 Sandy and rocky shores, e. Que. to Pa., n. Ind., Wise., and Man. 



12. P. AVIUM L. (SWEET C., MAZZARD.) Tree of pyramidal form and 

 reddish-brown bark; flowers large; petals mostly 12-15 mm. long ; inner biid- 

 scales at the base of the pedicels greenish, large, widely spreading, very hairy 

 on the inner surface and conspicuously glandular-serrate ; fruit depressed-glo- 

 bose, yellow or red, sweet and juicy. Often escaping from cultivation and 

 forming thickets in hedgerows, etc. (Introd. from Eurasia.) 



13. P. CERASUS L. (SouR or MORELLO C.) Tree of lower growth and 

 rounder head than th'e preceding ; bark gray ; flowers as in the preceding but 

 inner bud-scales small, not conspicuously spreading; fruit depressed-globose, 

 red, acid. Commonly cultivated, and occasionally escaping to hedgerows, 

 woods, etc. (Introd. from s. Eu.) 



14. P. nigra Ait. (WILD or CANADA P.) Shrub or small tree (2-8 m. high), 

 armed ; leaves thin, broadly obovate, subcaudately acuminate, doubly crenate- 

 serrate, the teeth usually gland-tipped; petioles mostly with 2 glands at the 

 summit ; calyx-lobes glandular-serrate, glabrous within ; petals white, broadly 

 obovate, 12-14 mm. long ; fruit orange-red or yellow, 2.5 cm. long, compressed- 

 ovoid tosubglobose, almost without bloom. River-banks and roadside thickets, 

 Nfd. to s. N. E. and westw. along the Great Lakes. 



15. P. hortulana Bailey. (WILD GOOSE P.) Small unarmed tree; leaves 

 ovate- or lance-oblong, caudate-acuminate, glabrous on both surfaces, at 

 maturity 9-15 cm. long, rounded at base, finely and somewhat unevenly crenate- 

 serrate; the teeth mostly gland-tipped; flowers 2-4 in a fascicle ; pedicels gla- 

 brous ; calyx-lobes glandular-serrate ; petals obovate, about 8 mm. long ; fruit 

 globular, thin-skinned, light yellow to red. "Rich bottom lands, 111. and Mo. 



16. P. americana Marsh. (WILD P.) Tree, 3-10 m. high, armed ; leaves 

 rather narrowly obovate, long-acuminate, sharply and doubly serrate, the teeth 

 not glandular; petioles with or without glands ; petals narrowly obovate, about 

 1 cm. long ; calyx-lobes entire, hairy on the inner surface ; fruit subglobose, 

 becoming red at full maturity, about 2 cm. in diameter. River-banks and 

 borders of woods, Ct. to Fla. , and westw. to Col. 



Var. m611is T. & G. Leaves permanently soft-pubescent or tomentose 

 beneath. la. to La. and Tex. 



3. AMYGDALUS (L.) B. & H. Drupe velvety-tomentose ; the stone deeply 



I sculptured and pitted; flowers stibsessile, from a scaly bud, opening 

 before the leaves appear; the latter conduplicate in bud. AMYGDALUS 

 [Tourn.] L. PERSICA [Tourn.] Borkh. 

 17. P. PERSICA (L.) Stokes. (PEACH.) Small tree ; leaves lance-oblong, 

 attenuate, serrate ; flowers pink; fruit subglobose. (Amygdalus L.) Abun- 

 dantly cultivated, and tending to become established in thickets, etc., N. Y., 

 and southw. (Introd. from Asia. ) 



LEGUMIN6SAE (PULSE FAMILY) 



Plants with papilionaceous or sometimes regular flowers, 10 (rarely 6 and 

 sometimes many} monadelphous, diadelphous, or rarely distinct stamens, and 

 a single simple free pistil becoming a legume in fruit. AWWx mostly without 

 albumen, Leaves alternate, with stipules, usually compound, One of the 



