ORDER 96. APOCYNACB^E. 589 



2. AMSONIA, Walt. (To Charles Amson, of S. Carolina?) Calyx 

 5-cleft, segments acuminate ; cor. 5-cleft, tube narrowly funnel-form, 

 bearded inside, hispid at throat, segments linear convolute in bud ; 

 stamens 5 ; style 1 ; ovaries 2, connate at base ; follicles 2, erect, slen- 

 der, fusiform ; seeds in one row, cylindric, truncate at each end, naked. 

 Lvs. alternate, entire, subsessile. Cymes terminal, corymbous. Fls. 

 blue. 



1 A. Tabernaexnontana Walt. Lvs. ovate-lanceolate, acuminate, acute at base, 

 briefly petiolate, puberulent beneath ; margin slightly revolute ; sep. glabrous 



^ lanceolate, acuminate ; cor. woolly outside near the top of the tube. A plant of 

 singular appearance, in prairies and damp grounds, W. and S. States. Stem 

 terete, smoothish, 2f high, branched above. Leaves numerous, 3 4' by 1 1$', 

 conspicuously veined beneath. Flowers pale or livid blue, in several terminal, 

 cymous clusters. Corolla 8" diam., very hairy at top of tube. Follicles in pairs, 

 2 3' long, about 6-seeded. May, June. (A. latifolia MX.) 



2 A. salicifolia Ph. Very glabrous and lance-elliptic, acuminate at each end. 

 conspicuously petiolate ; cal. segm. triangular acute ; cor. tube glabrous outside or 

 more or less woolly. In damp soils, Tenn., Car. to S. Ga. and borders of Fla. 

 Plant 12 to 18' high. Lvs. but half as large as in No. 1, 2 to 3' by 6 to 9". 

 Cymes terminal, short-stalked. Cor. blue, formed as in the other species. May, 

 Jn. Yaries with the leaves more or less pubescent when young, and the cor. 

 tube woolly. Always more delicate than No. 1. 



3 A. ciliata Walt. Lvs. approximate or crowded, lance-linear and linear, often 

 very narrow, margins ciliate ; st. pubescent, leafless above ; clusters corymbous, 

 at length paniculately branched ; cor. glabrous outside. Sandy soils, dry and moist. 

 Car, and Ga., common. Sts. 1 to 2f high. Lvs. 18" to 2' long, 1 to 3" wide, 

 sometimes much narrower than 1", almost filiform. Fls. light blue, as in the 

 other species, 6" long. (3. FILIFOLIA, growing on sandy hills, has the long pe- 

 dunculate inflorescence paniculate. Apr., May. (A. angustifolia MX.) 



3. FORSTERtTNIA, Meyer. (Dedicated to T. F. Forster, an English 

 botanist.) Calyx segments 5, ovate ; corolla funnel-form, not appen- 

 daged, deeply 5-cleft, lobes convolute (to the left) in bud ; anthers 

 sagittate, adherent to the stigma, the membranous tip inflexed ; stigma 

 2-lobed at apex, 5-angled in the middle ; follicles 2, distinct, spreading, 

 glabrous ; seeds many, comous. Twining shrubs, with opposite, petio- 

 late Ivs. and cymes of small fls. 



F. difformis DC. Branches smooth j Ivs. oval and lance-oval, abruptly acuminate, 

 acute at base, thin, glabrous above, puberulent beneath when young ; cymes pe- 

 dunculate, axillary and terminal, as long as the leaves ; cal. segm. long acumi- 

 nate from an ovate base. Damp or swampy grounds, Va. to Fla., climbing over 

 shrubs. Lvs. varying from elliptical to nearly orbicular, 1 to 2' broad. Cor. 3 

 to 4" long, pale yellow. Stam. included. May Aug. 



4. YIN'CA, L. PERIWINKLE. (Lat. vinculum, a band; from the 

 long, twining branches.) Calyx 5-parted, segments acuminate; corolla 

 funnel or salver-form, convolute, border 5-cleft, with the lobes oblique, 

 orifice 5-angled; 2 glands at the base of the ovary ; follicles 2, erect, 

 fusiform ; seeds oblong. Trailing Shrubs. Lvs. opposite, evergreen. 

 Juice slightly milky. 



1 V. minor L. Sts. procumbent ; Ivs. elliptic-lanceolate, smooth at the mar- 

 gins ; fls. pedunculate; seps. lanceolate. A handsome evergreen, flowering in 

 May. Sts. several feet in length, round, smooth and leafy. Leaves opposite, 

 smooth and shining, about an inch long. Flowers solitary, axillary, alternate, 

 violet, varying to purple or even white, inodorous. f Eur. 



2 V. major L. Sts. nearly erect ; Ivs. ovate, ciliate; fls. pedunculate; sep. 



