358 



ArOCYNACEiE. (DOGBANE FAMILY. 



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

 petioles (G'-12' long) filiform ; seeds smooth. (Villarsia cordate, Eli.) — Shal- 

 low ponds, Florida, and northward. June and July. 



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

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

 roughened. (Villarsia trachyspcrma, EU.) — Ponds in deep water, Florida to 

 North Carolina, and westward. April -June. 



Order 102. APOCYNACE^. (Dogbane Family.) 



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

 late leaves, and regular eymose or panieled flowers. — Calyx free, 5-parted, 

 imbricated in the bud, persistent. Corolla bell-shaped, funnel-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. Pol- 

 len granular. Ovaries 2, distinct, their styles united. Fruit few - 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-se%ded follicle. 

 •»- Seeds comose. Leaves opposite. 



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



Herbs. 



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



Twining shrubs. 



3. ECII1TES. Corolla funnel- or salver -shaped. Stamens inserted above the base of the 



corolla. 



m_ m_ Seeds miked. Leaves opposite or alternate. 



4. AMSONIA. Corolla funnel-shaped. Flowers panieled. Leaves alternate. 



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



# # Fruit a few-seeded drupe. 



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



1. APOCYNUM, Town. 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 numer- 

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

 oblong mueronate petioled leaves, and small white flowers in lateral and termi- 

 nal cymes. 



1. A. caiinabinum, li. Stem smooth, with erect branches ; leaves oval 



or oblong, mueronate, pubesa nl beneath ; cymes terminal, close-flowered, shortei 



than the leaves ; calyx-lobes lanceolate, as Long as the tube of the jrreenish-whito. 

 corolla j lobes of the corolla erect. (A. pubcsccn>, ft Br.)r— Vat. glaiikkki- 



