APOCYNACE^E. (DOGBANE FAMILY.) 359 



MCM. 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. androssemifolium, L. Stem smooth, with spreading branches ; 

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

 nal, long-peduncled, 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. 1. 



2. FORSTERONIA, Meyer. 



Calyx 5-parted, 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. Nectaiy 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 petioled 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. Follicles 

 6' -9' long. 



3. ECHITES, P. BROWNE. 



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. umbellata, Jacq. Smooth; stem twining; leaves distant, oval, 

 mucronate, slightly cordate, short-petioled, parellel-veined ; 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. Andre WSii. 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-flowered, shorter than the leaves ; calyx- 

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



