ICOSANDRIA— MONOGYNIA. Primus. 353 



2oQ. FRAGARIA. Cal. 10-cleft. Seeds naked, even, on 

 the surface of a moctly pulpy, deciduous receptacle. 



261. COM ARUM. Crt/. 10-cleft. Seeds \\?ike(\, even, on 

 the surface of a spongy hairy permanent receptacle. 



257. POTENTILLA. CaL 10-cleft. Seeds naked, rug- 

 ged, beardless. Recept. dry, obsolete. 



Spircea2, 3. 



ICOSANDRIA MONOGYNIA. 



250. PRUNUS. Plum and Cherry. 



Linn. Gen. 249. Juss.SU. FL Br. ^26. Tourn.t.SOS. Lam. 

 t, 432. Gcertn. t. 93. 



('erasus. Tourn. <. 401 . 



Nat. Ord. Pomacccc. Linn. 36. Bosacccc. Juss. 92. A"". 251 

 — 253 the same. 



Cal. inferior, of 1 leaf, bell-shaped, deciduous, with 5 ob- 

 tuse concave marginal segments. Pet. 5, roundish, con- 

 cave, spreading, larger than the segments of the calyx, 

 their short claws proceeding from its rim. Filam. 20 — 

 30, awl-shaped, nearly as long as the corolla, from the 

 rim of the calyx within the petals. Anth. short, of 2 

 round lobes. Germ, superior, roundish. Style thread- 

 shaped, terminal, the length of the stamens. St!<^ma or- 

 bicular, peltate. Driipa roundish or elliptical. AV// very 

 hard, somewhat compressed, of 1 cell and 2 more or less 

 distinct valves, prominent at tlie margin, with an inter- 

 mediate furrow ; kernel solitary, susjuMuled from the toji. 



7;7V'.s-, OY shrubs, s(mietimes thorny; with alternate, stalked, 

 stij)ulated, sim})le, serrated and glandular leaves. Fl. 

 white, on simple or compound stalks. Fr. aciil and 

 austere, greatly improved and varied by culture, but not 

 of the most wholesome (juality. Tlie even surface of the 

 n?/t is supposed to distinguish Primus from Amy^^dalus ; 

 that of the latter being full of superficial sinuses and chan- 



