ROSACEA. (rose family.) 113 



§ 3. PADUS, Mill. (Chebkt.) — I>mpe, Sfc. as jn § 2: flowers in racemes 

 terminating the branches, developed after the leaves. 



7. P. Tirglnlitna, L. (Choke-Cherkt.) Leaves irnal, oblong, or obo- 

 vate, abruptly pointed, very sharply {oflen doubly) serrate with slender teeth, thin ; 

 racemes short and close ; petals roundish ; fruit red turning to dark crimson. — 

 Biver-banks ; common, especially northward. May. — A tall shrub, seldom a 

 tree, with grayish bark ; the fniit very austere and astringent till perfectly ripe. 

 (P. obovata, Bigelow. P. serotina, of many authors.) 



8. P. Ser6tina, Ehrhart. (Wild Black Cheket.) Leaves oblong or 

 lanceolate-oblong, taper-pointed, serrate with incurved short and callous teeth, thickish, 

 shining above ; racemes elongated ; petak obovate ; fruit purplish-black. — 

 Woods, common. — A fine large tree, with reddish-brown branches, fiirnishing 

 valuable timber to the cabinet-maker. iEroit slightly bitter, but with a pleasant 

 vinous flavor. 



P. DOMi:8TioA, L., the Cultivated Plum, is now deemed by the best 

 botanists to have sprung from the Sloe. 



P. AememIaoa, L., the Apeioot, represents another subgenus of Prunns. 

 The Peach belongs to a very closely related genus. 



P. Avium and P. Cbeasub, L., of Europe, are the originals of the cultivated 

 Cherries. 



SUBORDEB II. ROSACEiE PROPER. ThE TRUE KoSE FAMLLT. 



a. SPIR.^A, E. Meadow-Sweet. 



Calyx 5-cleft, persistent. Petals 5, obovate, equal, imbricated in the bud. 

 Stamens 10-50. Pods (follicles) 3-12, several- (2-15-) seeded. — Flowers 

 white or rose-color, sometimes dioecious : rai-ely the parts are 4 instead of 5. 

 (Name probably from (nrnpato, to wind, alluding to the fitness of the plants to 

 be formed into garlands.) 



§ 1. PHYSOCARPOS, Camb. — Shrubs, mth simple palmaiely-hbed leaves and 

 umbd-like corymbs : pods inflated and diverging when grown, 2 - i-seeded. 



1. S* opniifolia, L. (Nine-Bark.) Leaves roundish, somewhat 3- 

 lobed and heart-shaped ; pods 3-5. — Rocky river-bants. June. — Shrub 

 4° - 10° high, with recurved branches and white flowers, succeeded by mem- 

 branaceous purplish pods : the old bark loose and separating in thin layers. - 



4 2. SPIR.ffiA peopeb. — Shrubs, with simple leaves, the stipules obsolete: pods 

 [inostly 5) not inflated, several-seeded. 



2. S. corymbdsa, Baf. Nearly smooth (l°-2°high); leaves oval or 

 ovate, cut-toothed towards the apex ; corymbs large, flat, several times compound. 

 — AUeghanies of Penn., to Virginia and Kentucky. June. — Flowers white. 



3. S. salicifdiia, L. (Common Meadow-Swbet.) Nearly srtooth 

 (2*-3° high) ; leaves wedge-lanceolate, simply or doubly sen-ate; flowers in a 

 cnnoded panicle; pods smooth. — Wet grounds: also cultivated. July.— 

 Flowers white or flesh-color. (Eu.) 



10* 



