270 ORDER 99. APOCYNACEJE. 



Flowers 5-parted, regular, Hie calyx persistent, the corolla twisted in aesti- 

 vation. Stamens 5, with distinct filaments, anthers filled with granular pol- 

 len. Ovaries 2, distinct, but their stigmas blended into a head-shaped mass. 

 Fruit 1 2 follicles, or capsular or baccate, with albuminous seeds. 



Herbs erect, native. a Corolla bell-form, whitish. Leaves opposite APOCYNUM. 1 



a Corolla salver-form, blue. Leaves alternate AMSONIA. 2 



Half-shrubby, cultivated, trailing or erect. Corolla wide-spread VINCA. 3 



Shrubs twining. 6 Native. Flowers small, yellowish FORSTERONIA, 4 



6 Cultivated. Flowers large, white ECHITES. 



Shrubs erect. c Leaves opposite or in 4's. Corolla yellow ALLAMA.NDA. 6 



c Leaves opposite or in 3's. Corolla roseate NERIUM. 7 



c Leaves alternate. Flowers 3". Fruit a drupe. S. Fla VALLESIA. 



1. APOCYNUM, Tourn. DOG'S-BANE. Cor. bell-form with short lobes. 

 Sta. included, alternating with 5 glandular teeth on the base of the corolla. 

 Ovaries 2. Stigma connate. Follicles slender, distinct. Seeds comous. 1C 

 Leaves entire, inucronate, opposite. Flowers pale, in cymes, June Aug. 



1 A. androsrcmifolium L. Leaves ovate ; cymes terminal and lateral ; cor. 3", 



with red stripes, tube longer than the calyx, lobes spreading. Hedges and fields. 3f. 

 A handsome plant, smooth or downy. 



2 A. cannabinum L. Leaves oval to lance-oblong, often downy beneath ; cymes 



terminal ; corolla 1", tube not longer than the calyx, lobes erect. In shades. 2 4f, 

 Pods 3' long. (A. hypericifolium Ait.) 



2. AMSONIA, Walt. Calyx segment pointed. Cor. tube hispid, fun- 

 nel-form, limb in 5 linear segments twisted in bud. Style 1. Ovaries 2, 

 connate at base, follicles 2, erect, slender. Seeds not comous. if Leaves 

 alternate, entire. Clusters terminal, blue. 



1 A, Ta herisfeiiionta.ua Walt. Leaves ovate-lanceolate, acuminate ; sepals lance- 

 acuminate ; corolla 8", livid blue. Damp grounds, W. and S. 2f. May, June. 

 Varies with leaves lance-elliptic, and sepals acute. 



JJ A. cillata Walt. Leaves more or less crowded, linear or filiform, the margins cili- 

 ate ; cluster long-stalked, corymbed, or soon panicled ; corolla glabrous outside. 

 Sands, S. : common. 1 2f. April, May. 



3. FORSTERONIA, Meyer. Corolla funnel-form, deeply 5-cleft, twisted 

 in bud. Anthers adherent to the stigma. Stigma 2-lobed. Follicles 2, 

 spreading, seeds comous. ^> Leaves opposite. 



F. diflormts DC. Climbing; leaves round-oval to lance-oval, cuspidate-pointed ; 

 cymes axillary and terminal, stalked : calyx segments ovate, long-pointed ; corolla 

 3 4", pale yellow. Swamps, Va., and S. May August. 



4. VINCA, L. PERIWINKLE. Cor. funnel- or salver-form, convolute, 

 with the 5 lobes oblique, orifice 5-angled. Two glands at base of the ovary. 

 Follicles 2, erect, slender. [^, ,'3 Lvs. opposite. Flowers solitary, axillary. 



1 V. MINOR. Procumbent , i-?aves elliptic-lanceolate, not ciliatc ; sepals lanceolate ; 



llowers scentless, violet, purple, or white. May, June. Europe. 



2 V. MAJOR. Decumbent ; leaves ovate, ciliate at edges ; sepals long, bristle-pointed. 



In shades, forming loose masses, leaves often silver-edged. Europe. 

 <f V. KOSEA. Erect, soft-downy; leaves oval, obtuse; flower* large, roseate, often 

 white or while-edged, perpetual. From Madagascar. 



