360 APOCYNACE^. (dogbane FAMILY.) 



of the Btamens, bell-shaped, scarcely longer than the ovate spreading lobes; 

 anthers tapering into a long bristle-like awn ; glands of the nectary 5, rounded, 

 as long as the ovaries. (E. suberecta, Andr. Neriandra suberecta, A. DC.) — 

 Sandy shores, South Florida. — Stem 1° -2° high. Leaves 1^'- 2' long. Tube 

 of the corolla 1' long, J' wide. 



4. AMSONIA, Walt. 



Calyx small, 5-partcd. Corolla funnel-form, 5-lobed, bearded within. Sta- 

 mens inserted above the middle of the tube : anthers oblong, obtuse. Stigma 

 globose, surrounded by a cup-shaped membrane. Pollicles slender. Seeds in a 

 single row, terete, truncated at each end, naked. — Erect branching perennial 

 herbs, with alternate leaves, and small pale blue flowers in a terminal panicle. 



1. A. TabernSBinontana, Walt. Stem smooth, branching above ; leaves 

 ovate, ovate-lanceolate, or lanceolate, acute or acuminate at each end, glaucous 

 beneath, short-petioled ; tube of the corolla slender, smooth, or woolly above, 

 many times longer than the minute calyx ; follicles spreading. (A. latifolia, 

 Michx. A. salicifolia, Pursh.) — Swamps and wet banks, Florida to Mississippi, 

 and northward. May and June. — Stem 2° high. Leaves l'-4' long, often 

 slightly pubescent beneath. Panicle open or contracted. Follicles 4' - 6' long. 



2. A. ciliata, Walt. Stem hairy, at length much branched above ; leaves 

 very numerous, linear or linear-lanceolate, acute at each end, fringed on the 

 margins ; corolla smooth. — Dry sandy soil, Florida to North Carolina. April 

 and May. — Stem at length 2° -3° high. Leaves l'-2' long. Corolla pale 

 blue or white. Follicles more slender than those of the preceding. 



5. VINCA, L. Periwinkle. 



Calyx 5-parte^ Corolla salver-form, 5-lobed, thickened or angular at the 

 throat, the narrow tube hairy within. Anthers oblong, longer than the filaments. 

 Glands 2, alternating with the ovaries. Style slender : stigma thick, with an 

 inverted cup-shaped membrane at the base. Follicles 2, linear, erect. Seeds 

 oblong, rough, naked. — Herbs or shrubby plants, with opposite short-petioled 

 leaves, and axillary mostly solitary showy flowers. 



1. V. rosea, L. Shrubby, pubescent ; stem erect, branching ; leaves ob- 

 long, rounded at the apex, mucronate ; flowers solitary or by pairs, nearly 

 sessile ; lobes of the corolla white or pale rose-color, obliquely obovate, mucro- 

 nate, shorter than the downy tube ; a row of hairs at the throat and another on 

 the tube below. — South Florida, and in the streets of Apalachicola, probably 

 introduced. Flowering through the summer. 



6. VALLESIA, Ruiz and Pavon. 



Calyx 5-parted. Corolla salver-shaped, 5 lobed. Stamens inserted on the 

 throat of the corolla : anthers cordate-ovate, longer than the slender filaments. 

 Nectary none. Ovaries 4-ovuled. Stigma club-shaped. Drupe mostly solitary, 



