358 APOCYNACE.E. (dOGBANE FAMILY.) 



1. L. lacunosum, Grisch. Loaves (l'- 2' wide) cordate, entire, smooth; 

 petioles (C - 12' loiijr) tilitbrin ; seeds smooth. ( Villarsia loiUiuu, Eli.) — Shal- 

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



2. L. trachyspertnura, Gray. Leaves (.3' -5' wide) eirenlar, crcnate^ 

 rougli and pitted hcneaili; petioles stout, dotted, elonpited ; seeds glandular- 

 roughened. (Villar.<ia traehysperma, Tv//.) — Ponds in deep water, Florida to 

 Nonli C'.uojiia, and westward. Ai)ril-June. 



Ordku 102. APOCYNACETE. (Dogbane Family.) 



Herbs or slirul)s, witli acrid milky juice, mostly opposite entire exstipu- 

 l.itc leav(,'s, and regular cymose or pauicled Howers. — Caly.x free, 5-parted, 

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

 salver-form, 5-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 ampliitropous, naked, or bearing a tuft of 

 down at the apex (comose). Embryo straight in scarce albumen. 



Synopsis. 



♦ Fruit a many-.»ecdcd follicle. 

 4- Seeds como.se. Leaves opposite. 



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



Ilerbs. 



2. FORSTERONIA. Corolla funnel-shaped. Stamens inserted at the base of the corolla. 



Twining shrubs. 



3. ECHITES. Corolla funnel- or salver-shaped. Stamens inserted above the base of th« 



corolla. 



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



4. AMSONIA. Corolla funnel-shaped. Flowers panicled. Leaves alternate. 



5. VINCI. Corolla salver-shaped. Flowers axillary. Leaves opposite. 



« » Fruit n few-seeded drupe. 



6. V.\LLESI.\. Corolla salver-shaped. Leaves alternate. Flowers in cymes. 



1. APOCYNXJM, Tourn. Lndian IIi.mi-. 



Calyx 5-partcd. Corolla bell-.shapcd, 5-lol)ed, with scale-like appendages at 

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

 sagittate. Stigma sessile, 2-lobed. Follicles long and slender. Seeds niimer- 

 oii.-i, olmvoid, comose. — Perennial erect branching lierbs, with opposite oval or 

 ()l)long mucronatc pctioled leaves, and small white flowers in lateral and termi- 

 nal cymes. 



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

 or oblong, mueroiiate, puiiescent beneath; cymes terminal, close-flowered, shortor 

 tliiin the leaves; ealyx-lobes lanceolate, as long ns the tube of the greenish -white 

 corolla ; lobes of the corolla erect. (A. pubeseens, R. Ui .) — Var. ulaukrui- 



