apocynacejE. (dogbane family.) 359 



MtTM. Smooth throughout ; leaves narrower, often acute at each end. — Dry or 

 damp soil, Florida, and northward. July and Aug. — 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- 

 nal, long-pedunclcd, commonly exceeding the leaves, loose-flowered ; calyx-lobes 

 ovate, shorter than the tube of the white or pale rose-colored corolla; lobes of 

 the corolla spreading or revolute. — Rich soil. North Carolina, and northward. 

 June and July. — Stem 2'-3' high. Corolla twice as large as in No. I. 



2. POESTERONIA, Meyer. 



Calyx .5-partod, mostly glandular at the base within. Corolla funnel-shaped, 

 5-cleft, without appendages. Filaments slender, inserted on the base of the 

 corolla ; anthers linear-sagittate. Nectary of 5 distinct or partly united thickish 

 glands. Stigma simple or 2-lobed, 5-angled. Follicle slender. Seeds linear- 

 oblong, comose. — Twining shrubs, with opposite pctioled leaves, and small 

 flowers in lateral and terminal cymes. 



1. P. difformis, A. DC. Leaves ovate-lanceolate, lanceolate or linear, 

 acuminate, narrowed into a petiole, smooth, or, like the branchlets, pubescent 

 when young ; cymes spreading, as long as the leaves ; flowers greenish. ( Echi- 

 tes difformis, Walt.) — River-banks, Florida to North Carolina. May -Aug. — 

 Stem twining, 10° -15° high. Leaves 2'- 3' long. Corolla 4" long. FoUioles 

 6' -9' long. 



3. ECHITES, P. Bkowjte. 



Calyx 5-parted, with 3-5 glands at the base within. Corolla salver- or 

 funnel-shaped, 5-lobed ; the tube mostly elongated, and dilated above the in- 

 sertion of the stamens. Filaments very short : anthers sagittate, bearing the 

 pollen, and adhering to the stigma in the middle. Nectary of 5 distinct or 

 partly united glands. Style simple : stigma thick, with a spreading membra- 

 nous appendage at the base. Follicles long and slender. Seeds linear-oblong, 

 comose or plumose. — Erect or twining shrubs, with opposite leaves, and cy- 

 mose axillary and terminal mostly fragrant flowers. 



1. E. umtaellata, Jacq. Smooth ; stem twining ; leaves distant, oval, 

 mucronate, slightly cordate, short-petioled, parellel-vcincd ; peduncles shorter 

 than the leaves, 3 - 7-flowered ; calyx-lobes ovate, acuminate ; corolla salver- 

 form, the cylindrical tube (2' long) slightly dilated above the insertion of the 

 stamens, four times as long as the rounded spreading lobes, pubescent within ; 

 anthers awnless ; stamens inserted near the middle of the tube. — South Florida. 

 — Leaves 1^'- 2' long, recurved and folded. Flowers white '! 



2. E. Andrewsii. Smooth ; stem low, erect or twining ; leaves approx- 

 imate, oval or oblong, mucronate, acute or rounded at the base, the margins 

 revolute ; peduncles axillary, 3 - .5-flowcred, shorter than the leaves ; calyx- 

 lobes lanceolate-subulate ; tube of the corolla much dilated above the insertion 



