S.'iS ArocTNACE.*:. (dogbane family.) 



1. L. lacunosum, r.riseh. Leaves (l'-2' wide) conlatc, entire, Bmootli ; 

 petioles ((j' - 12' loii;:) tiliform ; seetls smooth. ( Viilaisiu toidaiu, Ell.) — Shal- 

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



2. L. trachyspermum, Gray. Leaves (.3' -5' wide) cireular, ercnate, 

 ruii;:]i and ]iiii>'d Itencaiii; ])i'tioles stout, dotted, elongated; seeds f^landular- 

 rouj,diened. (Villarsia traehyspcrma, AY/.) — I'onds in ilcfp water, Florida to 

 North Carolina, and westward. April -June. 



Ordeu 102. APOCYNACEiE. (Dogbane Family.) 



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

 hite leaves, and regular cymose or panicled flowers. — Calyx free, 5-parted, 

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

 salver-form, .0-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-seeded follicle. 

 ^_ Seeds comose. Leaves opposite. 



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



Herbs. 



2. FORSTEKONIA. Corolla funuel-shaped. Stamens inserted at the base of the corolla. 



Twining shrubs. 



3. ECIIITES. Corolla funnel- or salver-shaped. Stamens inserted abo\e the base of the 



corolla. 



■t- ^- Seeds naked. Leaves opposite or alternate. 



4. AMSONIA. Corolla funnel-shaped. Flowers panicled. 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, Tourn. Ixuian Hemp. 



Calyx 5-parted. Corolla bell-shaped, 5-lobcd, with seale-likc appendages at 

 the base of the lobes. Stamens inserted on the base of tlic corolla : anthers 

 sagittate. Stigma sessile, 2-lobed. Foliiek-s long and slender. Seeds numer- 

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

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

 nal cymes. 



1. A. cannabinum, L. Stem smooth, with erect branches ; leaves oval 

 or oblong, mucronate, pubescent beneath; cymes terminal, close-flowered, shorter 

 than the leaves; calyx-lobes lanceolate, as long as the tube of the greenish-white 

 corolla; lobes of the corolla erect. (A. pubescens, R. Br.) — Var. glauerki- 



