AMYGDALACEAE. 45 



2. C. pellocarpus Mey. Small tree or shrub: leaf -blades oval, obovate, or 

 orbicular, mostly 2-6 cm. long, typically rounded or abruptly pointed: sepals 

 about 2 mm. long: drupes obovoid or oblong-obovoid, 1.5-2 cm. long, purple: 

 stone oblong or oblong-obovid, sharj^-ridged. 



The Small-fruited cocoa-plum grows in hammocks on the Everglade Keys 

 and on hammock islands in the Everglades. The wood is nearly or quite similar 

 to that of the preceding species. (W. I.) 



2. AMYGDALUS [Tourn.] L. Shrubs or trees. Leaves very strongly 

 impregnated viith prussic acid. Flowers short-pedicelled or sessile. Corolla 

 mostly pink. Drujje velvety-j)ubescent, the stone wrinkled and pitted. 



1. A. Persica L. Tree: leaf -blades narrowly elliptic to lanceolate, or rarely 

 oblong-obovate, shining, sharply serrate: petals pink, 8-20 mm. long: drupes 

 subglobose or oblong, 4-10 cm. long, grooved on one side, velvety. — Spr. 



The rEACii, a native of western Asia, grows in old fields, thickets and woods 

 in northern Florida. The light-brown heart-wood is coarse-grained, rather light, 

 and soft. (Cont., W. I.) 



3. PBUNUS [Tourn.] L. Shrubs or trees. Leaves sometimes slightly 

 impregnated with prussic acid. Flowers in corymbose or umbel-like clusters, 

 relatively long-pedicelled. Corolla mostly white. Drupes usually glabrous 

 and glaucous, the stone smooth or nearly so. — Spr. — Plum. 



Drupe purple or nearly black beneath the bloom. 15 mm. in diameter, or less. 



1. P. umbellata. 

 Drupe red or orange, without a bloom or nearly so, over 15 mm. 

 in diameter. 

 Petals about 0.5 cm. long : sepals glandular-ciliate. 2. P. angustifoJia. 



Petals about 1 cm. long: sepals not glandular-ciliate. 3. P. ainericana. 



1. P. umbellata Ell. Small tree or shrub: leaf -blades thinnish, oblong, ellip- 

 tic, or nearly oval, sometimes broadest above or below the middle, short- 

 acuminate, or merely acute, serrate, rounded or acute at the base, glabrous: 

 flowers mostly exj^anding before the leaves, in lateral clusters: sepals pubes- 

 cent within: petals 4-7 mm. long: drupes globose or nearly so, 12-15 mm. in 

 diameter, nearly black beneath the bloom, with an acid flesh; stone plump, 

 acute at both ends. 



The Black-sloe grows in dry woods and hammocks in northern Florida and in 

 the peninsula as far south as the Everglade region. The reddish-brown heart- 

 wood is close-grained, heavy, and hard. (Cont.) 



2. P. angustifolia Marsh. Sparingly spiny small tree or shrub, often forming 

 thickets: leaf-blades rather thin, oblong or oblong-lanceolate, 3-10 cm. long, 

 acute or slightly acuminate at the apex, serrulate, acute or rounded at the 

 base, short-petioled: flowers in lateral clusters, appearing before the leaves: 

 sepals ovate: petals with mainly orbicular or reniform blades: drupes oval- 

 globose, 22-26 mm. long, red or yellowish, with a slight bloom; stone ovoid, 

 hardly flattened, acute, one of the rounded edges slightly grooved. 



The Ciiickasaw-plum grows in old fields and thickets in northern Florida, and 

 the northern part of the peninsula. The brown heart-wood is close-grained and 

 heavy, but soft and weak. (Cont.) 



3. P. americana Marsh. Small somewhat spiny tree: leaf-blades elliptic to 

 oval or oval-obovate, 4-10 cm. long, acuminate, sharply singly or doubly ser- 

 rate, pubescent beneath, especially near the veins, acute or rounded at the 

 slightly inequilateral base; petioles usually glandless: flowers 2-5 in lateral 

 clusters appearing before the leaves: sepals entire: petals 7-10 mm. long: 

 drupes subglobose or barely elongate, 18-25 mm. long, sometimes with a slight 

 bloom; stone ovoid or oval, flattened, not crested along the ventral suture. 



The Wild-plum grows in open woods and thickets in middle and western 

 Florida. The deep-brown or red-tinged heart-wood is close-grained, heavy, hard, 

 and strong. (Cont.) 



