44 AMYGDALACEAE. 



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. 

 Flowers manifestly pedicelled : mature pedicels over 8 mm. 



long : leaf-blades over twice as long as wide. 2. P. angustifolia. 



Flowers sessile or nearly so : mature pedicels 2-3 mm. long : 



leaf-blades less than twice as long as wide. 3. P. geniculata. 



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 expanding 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. BLACK-SLOE. HOG-PLUM. BULLACE-PLUM. 



Dry woods and hammocks, n. Fla. and the upper pen. (Cont.) 



2. P. angustifolia Marsh. Sparingly spiny smalltree 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. OLD-FIELD 

 PLUM. CHICKASAW-PLUM. 



Old fields and thickets, n. Fla. and n. pen. (Cont.) 



3. P. geniculata Harper. Diffusely branched shrub, 1.5 m. tall or less, with 

 numerous zigzag somewhat spinescent branches: leaf -blades oblong, 1-2.5 cm. 

 long, mucronate, finely crenate-serrate, rather short-petioled: flowers in lateral 

 f ew-flowered sessile umbels appearing before the leaves : pedicels stout, 2-3 mm. 

 long: corolla white, 1 cm. wide or less: drupes oval or globose-oval, 2.5 cm. 

 long or less. 



Sandy soil, vicinity of Lake Apopoka. 



4. LAUEOCERASUS Reichenb. Shrubs or trees. Leaves persistent, 

 copiously impregnated with prussie acid. Flowers in axillary racemes. Hypan- 

 thium white. Sepals minute. Petals more or less angulate. Drupe with a 

 dry exocarp. 



Petals larger than the sepals : drupe subglobose. 1. L. myrtifolia. 



Petals smaller than the sepals : drupe oblong or oval. 2. L. caroliniana. 



1. L. myrtifolia (L.) Britton. Shrub or small tree: leaf -blades elliptic: 

 racemes loosely flowered, the pedicels slender: petals slightly angled: drupes 

 8-12 mm. in diameter: stone sphaeroidal. [L. sphaerocarpa (Sw.) Eoem.] 

 WEST-INDIAN CHERRY. 



Hammocks, E. Keys and F. Keys. (W. I.) Fall. 



2. L. caroliniana (Mill.) Eoem. Shrub or small tree: leaf-blades narrowly 

 elliptic to oblong-oblanceolate: racemes densely flowered, the pedicels stout: 

 petals saliently angled: drupes 10-13 mm. long: stone ovoid. MOCK-ORANGE. 



Woods and river-banks, nearly throughout Fla.. except the F. Keys. (Cont., 

 W. I.) Winter-spr. 



FAMILY 8. MIMOSACEAE. MIMOSA FAMILY. 



Herbs, shrubs, or trees. Leaves alternate : blades compound, usually 

 2-3-pinnate : stipules sometimes spine-like. Flowers mostly perfect, borne 

 in capitate or elongate usually dense spikes or racemes. Calyx of 3-6 

 partially united sepals. Corolla of 3-6 equal, distinct or partially united, 



