APOCYJTACEJE. "(DOGBANE FAMILY.) 341 



1. L. lacunosum, Griseb. Leaves (!'- 2' wide) cordate, entire, smooth; 

 petioles (6'-12' long) fi.iform ; seeds smooth. Shallow ponds, Florida, and 

 northward. June -July. 



2. L. trachyspermum, Gray. Leaves (3' -5' wide) circular, crenate, 

 rough and pitted beneath; petioles stout, dotted, elougated; seeds glandular- 

 roughened. Pouds in deep water. April - June. 



ORDER 95. APOCYNACE^. (DOGBANE FAMILY.) 



Herbs or shrubs, with acrid milky juice, mostly opposite entire ex- 

 stipulate leaves, and regular cymose or panic-led flowers. Calyx free, 

 5-parted, imbricated in the bud, persistent. Corolla bell-shaped, fun- 

 nel-shaped, or salver-form, 5-lobed, convolute in the bud. Stamens 5, 

 distinct, inserted on the tube of the corolla: anthers mostly sagittate, 

 erect, introrse. Pollen granular. Ovaries 2, distinct, their styles 

 united. Fruit few -many-seeded. Seeds an atropous or amphitropous. 

 naked, or bearing a tuft of down at the apex (comose). Embr)<. 

 straight in scarce albumen. 



Synopsis. 



* Fruit a many-seeded follicle. 

 - Seeds coinose. Leaves opposite. 



1. APOCYNUM. Corolla bell-shaped, with scale-like appendages at the base of the lobes. 



Herbs. 



2. ECHITES. Corolla funnel- or salver-shaped. Stamens inserted above the base of the 



corolla. 



i- H- Seeds naked. Leaves opposite or alternate. 



3. AMSONIA. Corolla funnel-shaped. Flowers panicled. Leaves alternate. 



4. VINCA. Corolla salver-shaped. Flowers axillary. Leaves opposite. 



* # Fruit a few-seeded drupe. 



5. VALLESIA. Corolla salver-shaped. Leaves alternate. Flowers in cymes. 



1. APOCYNUM, Tourn. INDIAN HEMP. 



Calyx 5-parted. Corolla bell shaped, 5-lobed, with scale-like appendages at 

 the base of the lobes. Stamens inserted on the base of the corolla: anthers 

 sagittate Stigma sessile, 2-lobed. Follicles long and slender. Seeds nu- 

 merous, obovoid, comose. Perennial erect branching herbs, with opposite 

 oval or oblong mucronate petioled leaves, and small white flowers in lateral 

 and terminal cymes. 



1 . A. cannabinum, L. Stem smooth, with erect branches ; leaves oval 

 or oblong, mncronate. pubescent beneath ; cymes terminal, close-flowered, 

 shorter than the leaves ; calyx lobes lanceolate ; lobes of the greenish white 

 corolla erect. Var. GLABERRIMUM. Smooth throughout ; leaves narrower, 

 often acute at each end. Dry or damp soil. July - August. Stem 2-3 

 high. Leaves 2' - 3' long. Corolla 2" long. 



2. A. androsaemifolium, L. Stem smooth, with spreading branches ; 

 leaves oval or ovate, smooth, or pubescent beneath ; cymes axillary and termi- 



