270 ORDER 09. APOCYNACE^E. 



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

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

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

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



Ilerba erect, native. a Corolla bell-form, whitish. Leaves opposite APOCTNUM. 1 



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



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



Shrubs twining. b Native. Flowers small, yellowish P'ORSTKRONIA. 4 



6 Cultivated. Flowers large, white ECHITKS. fi 



Shrubs erect. c Leaves opposite or in 4's. Corolla yellow ALLAMANDA. 



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



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



1. APOCYNUM, Tourn. DOG'S-BAKE. 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. U 

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



1 A. androRsemlfollum L. Leaves ovate ; cymes terminal and lateral ; cor. 8", 



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 y 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. U Leaves 

 alternate, entire. Clusters terminal, blue. 



1 A. Tabcniaemonta.na 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. 



2 A. cilia ta 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, twisteu 

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

 spreading, seeds comous. *> Leaves opposite. 



F. difformis 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 ovaiy. 

 Follicles 2, erect, slender. [^ 5 Lvs. opposite. Flowers solitary, axillary. 



1 V, MINOR. Procumbent ; *eaves elliptic-lanceolate, not ciliate ; sepals lanceolate ; 



flowers 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. 

 a V. ROSEA. Erect, soft-downy; leaves oval, obttw ; flowei* large, roseate, often 

 white or while-edged, perpetual. From Mada<;:ii-:u. 



