434 ORDER LXXX. APOCYNACE2E. 



Order LXXX.— APOCYNA'CEJE. (Dog-bane Family) 



Calyx persistent, 5-cleft. Corolla hypogynous, 5-lobed, reg- 

 ular, aestivation twisted. Stamens 5, inserted into the corolla, 

 alternate with its lobes. Ovaries 2, or 1 — 2-celled, many-seed- 

 ed. Style 1 — 2, or wanting. Stigma 1. Fruit usually a fol- 

 licle, double or single, or a capsule. Seed numerous. Plants 

 usually with a milky juice. Leaves entire. 



Genus I.— APOC'YNUM. Tourn. 18—5. 

 (From apo, from, and kxion, a dog.) 



Calyx minute, 5-cleft, persistent. Corolla campanulate, with 

 the limb divided into 5 short, spreading or revolute lobes, the 

 base furnished with 5 glandular teeth, alternating with the sta- 

 mens. Stamens 5 ; anthers sagittate. Style wanting. Fol- 

 licles 2, long, distinct. 



1. A. ANDRosiEMiFo'LiuM, (L.) Stem erect, with spreading branches. 

 Leaves ovate, glabrous. Flowers in terminal and lateral cymes. Tube 

 of the corolla longer than the calyx. — White, tinged with red. 21. 

 June — July. Common. 3 — 5 feet. Dog's-bane. 



2. A. Cannabi'num, (L.) Stem erect, branched. Leaves lanceolate, 

 acute, on short petioles, glabrous. Flowers in paniculate cymes. Ca- 

 lyx about as long as the tube of the corolla. — Greenish-white. %. 

 June — July. Common. Indian Hemp. 



3. A. pubes'cens, (Br.) Stem erect. Leaves ovate, oblong, on 

 short petioles, mucronate. Flowers in short pubescent cymes ; tube ot 

 the corolla longer than the calyx. — Greenish- white. If. June — July. 

 Common. 2 — 3 feet. 



Genus II.— AMSO'NIA. Walt. 18—5. 



Calyx 5-parted. Corolla funnel-shaped, with the throa* 

 closed. Follicles 2, erect. Seed terete, with the summit oblique- 

 ly truncate. 



1. A. latifo'lia, (Pursh.) Stem erect, glabrous. Leaves oval-lance- 

 olate, on short petioles, alternate ; upper ones acuminate, pubescent 

 along the veins beneath. Flowers in terminal corymbose panicles ; fol- 

 licles linear, long. — Pale blue. 2£. April — May. Very common. 

 Middle Car. and Geo. 



2. A. salicifo'lia, (Pursh.) Stem erect, smooth, growing in bunches. 

 Leaves linear-lanceolate, acute, glabrous. Flowers in terminal corymbs, 

 numerous; follicles long, slender. — Pale blue. May — June. Abundant 

 near Macon, Geo. 1 — 2 feet. 



3. A. angustifo'lia, (Mich.) Stem erect, pubescent, branching. 

 Leaves linear-lanceolate, numerous, pubescent, erect, thoae of the 

 branches linear, ciliate ; follicles long, slender. — Blue. %. April — 

 May. Middle Car. and Geo. Abundant. A. ciliata. 



