408 ROSACEA. Pruncs. 



very variable in quality. The flowers are much smaller than in P. 

 Americana. 



•7*- 3. P. glandulosa (Hook.): low, somewhat thorny; branches pubescent 

 and crooked ; leaves (small) pubescent, oval, obtuse, often narrowed at the 

 base, the serratures, as well as those of the calyx-segments, spreading and 

 very glandular ; umbels 1-2-flowered ; ovary pubescent ; style elongated ; 

 fruit unknown. — Hook. ! icon. t. 288. 



Texas, Drummond ! — Shrub a])parently a foot or less in height, with very 

 crooked branches. Leaves scarcely an inch in length, rather smooth above. 

 Flowers small. 



/ . 4. P. maritiina (Wang.) : low ; branches seldom thorny ; leaves oval, 

 ovate, or somewhat obovate, mostly somewhat acuminate, finely and sharply 

 serrate ; petioles mostly biglandular ; umbels few-flowered ; pedicels short, 

 somewhat pubescent ; fruit subglobose (red or purple), covered with a 

 bloom. 



a. leaves softly pubescent or tomentose beneath ; fruit large, pleasant.— 

 P. maritima, Wanii. Amer. j}- 103; Willd. ! enum. 1. j^- 519; DC. I.e. 

 P. sphaerocarpa, Alichx. ! fl. 1. jj. 284. P. pubescens, Pursh, fl. 1. p. 

 331 (quoad syn.) P. Uttoralis, Bigel. ! fl. Bast. ed. 2. _p. 193. Cerasus 

 pubescens, Serin ge, in DC. prodr. 2. p. 538. 



/?. leaves when old mostly glabrous on both sides ; fruit smaller, red or 

 purplish. — P. pygmaea, Willd. spec. 2. p. 993, <^ enum. 1. p. 518. P. 

 declinata. Marsh, arhust. ? P. acuminata, Michx. ! I. c. (charac. bad.) 

 Cerasus pygmaea, Loisel. ; DC. I. c. 



Sandy sea-coast, Massachusetts ! to New Jersey ! 0. Sandy barrens near 

 the coast or with the preceding, Long Island ! and New Jersey ! to Virginia. 

 Also Alabama, Mr. Buckley ! April-May. — A low shrub with stout strag- 

 gling branches. Leaves singly or doubly serrate, sometimes obtuse or with 

 a slight acumination, frequently acute. Fruit often an inch in diameter 

 and pleasant to the taste ; and sometimes even on the same stem smaller, 

 acerb and astringent. — The two forms here described may be traced into 

 each other with great certainty ; and Bigelow seems to have included both 

 under his P. littoraUs. The fruit of our /?. is sometimes scarcely half an 

 inch in diameter, and often pretty well-flavoured ; but it is only on a warm 

 sandy beach that it arrives to perfection. Pursh has evidently confounded 

 this plant with P. Americana, as Elliott remarks, and to that the fragments 

 in his herbarium seem, in part, to belong. — Beach Plum. Sand Plum. 



t Introduced Species. 



5. P. spinosa (Linn.) : branches thorny ; pedicels solitary ; caly-x cam- 

 panulate ; the lobes obtuse, longer than ihe tube ; leaves obovate-elliptical or 

 ovate, pubescent beneath, sharply and doubly toothed ; drupe globose. Ser- 

 inge.— Vahl, fl. Dan. t. 926 ; Pursh, fl. 1. p. 333 ; DC. prodr. 2. p. 532 ; 

 Hook. fl. Bor.-Am. 1. p. 167. 



In hedge-rows and cultivated grounds, introduced from Europe, and na- 

 turalized in some parts of Penns3dvania, according to Pursh, &c. — Black 

 Thorn. Sloe. 



P. Canadensis (Linn. spec. ed. 2.) must doubtless be suppressed. The specimen 

 in the herbarium of Linnseus from which the character, as to the leaves, seems to 

 have been drawn, has neither flowers norfruit, and appears to belong to P. Ameri- 

 cana, Marsh., but that species has not racemose flowers. The specimen appended 

 to this, named by the younger Linnaeus " Americana," and referred by some person 

 to "C. racamosa, foliis amygdalinis Americana," Pluk. aim. t. 158,/. 4, is 



