82 APOCYNACE^. Ainsonia. 



2 or 3 lines long, fully half the length of the tube ; orifice bearded : mass of the stigma 

 between tlie ring and the lobes broader than high : follicles as in the preceding 1 — Frem. 

 Rep. ed. 2, 316, & Bot. Mex. Bound. 158. — Sandy plains and ravines, W. border of Texas 

 to S. Utah, Fremont, Wriglit, Mrs. Thompson, &c. 



* * Follicles slender and continuous : tube of the corolla much longer than the lobes. 



A. Palmeri, Gray. Glabrous or nearly so, a foot or two high : leaves narrowly lanceo- 

 late or linear, sessile (1^ to 3 inches long) : clusters simple and few-flowered: lobes of the 

 white corolla ovate, 1^ to 2 lines long, about a quarter the length of the tube, which is 



• reflexed-bearded within almost to the base : mass of the stigma didymous, puberulent, di- 

 vided almost down to the ring. — Proc. Am. Acad. 1. c. — Arizona, Palmer. 



A. longiflora, Torr. Minutely scabrous or even scabrous-pubescent, or above glabrous : 

 leaves linear, sessile (i to 2 lines wide, 1 to 2 inches long) : lobes of the corolla narrowly 

 oblong, white, a quarter the length of the greenish-purple clavate tube ; this over an inch 

 long and glabrous within except toward the summit : body of the stigma trochleate, much 

 longer than wide, surmounted by the small and short lobes. — Bot. Mex. Bound. 158. — 

 Rocky ravines, "W. Te.xas and New Mexico on the Rio Grande, and adjacent Mexico. 



3. VtNCA, L. Periwinkle. (Ancient Latin name, of obscure meaning.) 

 Flowers handsome, usually axillary. Juice hardly milky. — Two distinct sub- 

 genera : § 1. Pervinca ; herbaceous and procumbent or creeping Old World 

 species, blue-flowered, anthers with wide connective, and carpels only 6-8-ovuled ; 

 includes V. minor, L., the common Periwinkle of the gardens and the related 

 species. § 2. Lochnera, A.DC. ; low and erect shrubby plants, with white or 

 rose-colored corolla, anthers with narrow connective and carpels several-seeded ; 

 represented by the following species. 



V. rosea, L. Low erect shrub, puberulent : leaves oblong, short-petioled : flowers almost 

 sessile : 'tube of corolla an inch long, the narrowly dilated upper portion with a necta- 

 riferous pit (externally salient) behind each anther; the throat with a hairy ring over the 

 tips of the stamens and a slighter one at the narrow orifice ; lobes obovate, shorter than 

 the tube, white with a pink eye, sometimes all rose-color or white, showy. — Bot. Mag. 

 t. 248. — Loc/mero. vincoides, Reichenb. — S. Florida : possibly native. Widely distributed 

 as a weed in the tropics ; cult, as a house-plant. (Trop. Amer.) 



4. HAPL6PHYT0N, A.DC. (Composed of dnloog, simple, and -qiviov, 

 plant, alluding to the want of calycine glands and disk.) — DeCandolle was not 

 aware of the double coma, and Benth. & Hook, (Gen. ii. 722) wrongly assign to 

 it adnate anthers with empty tails, referring it to the EchitidecE. Single species. 

 H. cimicidum, A.DC. Herbaceous or nearly so from a suffrutescent base, slender, a 



foot or two high, branching, somewhat cinereous-puberulent : leaves hispidulous-scabrous, 

 opposite and alternate, lanceolate or ovate-lanceolate, short-petioled, an inch or two long : 

 flowers terminating the branches, short-peduncled : corolla sulphur-color, half inch or more 

 long; the lobes as long as the tube. — Prodr. viii. 412; Torr. Bot. Mex. Bound. 159. — S. 

 Arizona, in crevices of rocks, Wriglit, Schott, Thurber. (Mex., Guatemala, Cuba.) 



5. AP6CYNUM, Tourn. Dogbane, Indian Hemp. (Ancient Greek 

 name for Dogbane ; and, far from, y.vcor, dog.) — Perennial herbs (of northern 

 temperate zone), pale or glaucescent; the liber very tough-fibrous;, and the leaves 

 opposite, oval or oblong, miicronate-tipped. Flowers (in summer) small, in ter- 

 minal minutely subulate-bracteate cymes, white or rose-color. Follicles 2 to 7 

 inches long, slender-pointed, often deflexed. 



A. androseemifolium, L. A foot to a yard high, glabrous, or rarely soft-tomentose, 

 branched above : branches widely spreading : leaves ovate or roundish, distinctly petioled : 



