358 APOCYNACF.-E. (DOGBANE FAMILY.) 



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

 petioles (6' — 12' long) filiform ; seeds smooth. (Villarsia eordata, A'//.) — shal- 

 low ponds, Florida, ami northward June ami July. 



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

 rough and pitted beneath; petioles stout, dotted, elongated; seeds glandular 1 

 roughened. (Villarsia trachysperma, Ell.) — Ponds in deep water, Florida to 

 North Carolina, and westward. April -June. 



Ordeb 102. APOCYNACE7E. (Dogbane Family.) 



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

 late le,i\ es, and regular cymose or panicled flowers. — Calyx free, 5-parted, 

 imbricated in the bud, persistent. Corolla bell-shaped, tunnel-shaped, or 

 salver-form, 5-lobed, convolute in the bud. Stamens .">, distinct, inserted 

 on the tube of the corolla: anthers mostly sagittate, erect, introrse. Pol- 

 len granular. Ovaries 2, distinct, their styles united. Fruit lew - many- 

 seeded. Seeds anatropous or amphitropous, naked, or bearing a tuft of 

 down at the apex (comose). Embryo straight in scarce albumen. 



Synopsis. 



» Fruit a many-seeded follicle. 

 +- Seeds comose. Leaves opposite. 



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



Herbs. 



2. FORSTERONIA. Corolla funnel-shaped. Stamens inserted at the base of the corolla. 



Twining shrubs. 



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



corolla. 



4- +- Seeds naked. Leaves opposite or alternate. 



4. AMSONIA. Corolla funnel-shaped. Flowers panicled. Leavi-s alternate. 



5. VINCA. Corolla salver-shaped. Flowers axillary, heaves opposite. 



# « Fruit a few-seeded drupe. 



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



1. APOCYNUM, Tourn. Indian Hi mi. 



Calyx 5-parted. Corolla bell-shaped, 5-lobed, with Bcale-like appendagea at 

 the base of the lol.es. Stamens inserted on the base of the corolla : anthers 

 sagittate. Stigma sessile, 2-lobed. Follicles lone; and slender. Seeds numer- 

 ous, obovoid, comose. — Perennial erect branching herbs, with opposite oval or 

 oblong mucronate petioled have.-, and small white flowers in lateral and termi- 

 nal cymes. 



1. A. cannabinum, L. Stem Bmooth, with erect branches ; [eaves oval 

 or oblong, mucronate, pubescent beneath ; cj mes terminal, close-flowered, shorter 

 than the leaves ; calyx loi.es lanceolate, as long as the tube of the greenish white 

 corolla: lobe* of the corolla erect. (A. pubescen , /.'. /.v.) — Var, olabi aw- 



