APOCYNACEAE. 739 



or faintly pink, 6-7 mm. long, its segments acutish, spreading; pods 7-12 cm. long. 

 Fields and roadsides, Md. and D. C. June-Aug. [A. spedosum G. S. Miller.] 



3. Apocynum Miller! Britton. MILLER'S DOGBANE. Slender, seldom over 

 10 dm. high, the branches widely spreading. Leaves oblong to ovate-lanceolate, 

 6-8 cm. long, mucronate, pubescent beneath; petioles 3-6 mm. long, pubescent; 

 cymes small, terminal, or also in the upper axils; pedicels 2-3 mm. long. Flowers 

 suberect; corolla pinkish, 5-6 mm. long, its rounded segments spreading; pods 

 about 9 cm. long. Dry soil, N. Y. to Md. June-July. [A. medium G. S. Miller, 

 not Greene.] 



4. Apocynum urceolifer G. S. Miller. URN -FLOWERED DOGBANE. Similar 

 to the preceding species, and about equally tall; flowers smaller; corolla 4-5 mm. 

 long, white, or merely tinged with pink, its segments pointed, spreading; calyx 

 about as long as the corolla-tube. Fields and roadsides, N. Y. to Md. and Mo. 

 June-July. 



5. Apocynum cannabinum L. INDIAN HEMP. AMY-ROOT. (I. F. f. 2896.) 

 Root deep, vertical. Stem 10-17 dm. high, the branches erect or ascending. 

 Leaves oblong, lanceolate-oblong or ovate-oblong, mucronate, glabrous above, 

 sometimes pubescent beneath, 5-10 cm. long; petioles 2-15 mm. long, or some- 

 times none; cymes dense; pedicels short, bracteolate at the base; calyx-segments 

 nearly as long as the tube of the greenish white corolla; follicles 13-20 cm. long. 

 In fields and thickets, Anticosti to Br. Col., Fla. and Lower Cal. June-Aug. 



6. Apocynum album Greene. RIVER-BANK DOGBANE. Glabrous; leaves 

 smaller, oblong-lanceolate,, acute at each end, or sometimes rounded at the base, 

 seldom over 7 cm. long and 2 cm. wide, distinctly petioled. On river-shores and 

 similar situations. Me. and Ont. to Wise., Va. and Mo. June-July. 



7. Apocynum hypericifolium Ait. CLASPING-LEAVED DOGBANE. (I. F. f. 

 2897.) Glabrous, often glaucous; stem 3-6 dm. high, the branches ascending. 

 Leaves oblong, oblong-lanceolate to oval, 2-8 cm. long, cordate-clasping, rounded, 

 truncate, or the upper narrowed at the base, short-petioled, or sessile, the primary 

 venation forming broad angles with the midvein; cymes many-flowered; pedicels 

 mostly not longer than the flowers, bracteolate; calyx-segments about the length of 

 the corolla-tube, lanceolate, acute; follicles 5-9 cm. long. In dry soil, or along 

 streams, Ont. to Br. Col., Ohio, 111. and N. Mex. June-Aug. 



8. Apocynum pubescens R. Br. VELVET DOGBANE. (I. F. f. 2898.) Whole 

 plant, including the pedicels and calyx, densely velvety-pubescent. Branches 

 ascending; leaves oval to elliptic, strongly mucronate, obtuse or obtusish at the 

 base, the veins impressed in the pubescence of the lower surface; petioles 2-4 mm. 

 long; cymes dense; calyx-segments about as long as the tube of the corolla, lanceo- 

 late, acute; corolla apparently purple, its lobes erect; follicles 6-7 cm. long. Va. 

 to 111., Iowa and Mo. 



4. TRACHELOSPERMUM Lemaire. 



Twining woody vines (some exotic species nearly erect shrubs), with oppo- 

 site entire leaves, and small flowers in compound cymes. Calyx small, deeply 

 5-parted, glandular within, the segments narrow. Corolla funnelform or salverform, 

 the tube nearly cylindric, expanded above. Stamens included, or short- exserted; 

 anthers sagittate, acuminate, connivent around the stigma. Disk of 5 glandular 

 lobes. Ovary of 2 carpels; ovules numerous; style slender, its apex thickened below 

 the narrow ring of the ovoid stigma. Follicles much elongated, slender. Seeds 

 linear, not beaked, long-comose at the apex. [Greek, neck-seed, but the seed is 

 not beaked.] About 6 species, natives of eastern Asia and N. Am. 



i. Trachelospermum difforme (Walt.) A. Gray. TRACHELOSPERMUM. 

 (I. F. f. 2899.) Stems I cm. in diameter or more. Leaves thin, ovate, oval or 

 lanceolate, acuminate or acute, 3-8 cm. long; peduncles shorter than the leaves; 

 flowers yellow or cream-color, 8-10 mm. long; lobes of the corolla ovate, spread- 

 ing, shorter than the tube; follicles 1.2-2.3 dm. l n g> scarcely 4 mm. thick. In 

 moist woods and along streams, Del. to Fla., Tex. and Mex., mostly near the 

 coast. June-Aug. 



