256 FLORA OF PHILADELPHIA. 



— ' Woods Mills (Wa.). Cumberland— Vineland (Be.). Atlantic— Ham- 

 montoii (Cr.) (Je.), Egg Harbor, extinct (Wn.). Ocean — Point Pleasant 

 (Wa). Monmouth— Spring Lake (Wn.). Mercer— Princeton Junction 

 (C). 



Family 5. APOCYNACEAB Liftdl. Dogbane Family. 



Leaves alternate; erect herbs. 1. Amsonia. 



Leaves opposite ; , vines or herbs. 



Flowers large, axillary, solitary. 2. Vinca. 



Mowers small, cymose. 



Erect or diffuse herbs ; eorolla campanulate to urceolate. 



3. Apocynum. 

 High-climbing vines ; c6rolla f unnel'f orm. 4. ' Trachelospetm/wm. 



I 1. AMSONIA.: Walt. 

 1. Amsqnia Amsonia (L.) Britton. M. p. 737. Cultivated; residue of 

 nurseries. Spring. 



2. VINCA L. 

 X. Vinca minor L. Periwinkle. M. p. 738. Escaped from cultivation. 

 Spring. 



3. APOCYNUM L. Dogbane. 



Corolla 5-9 mm. long, its lobes spreading or recurved. 



1. A. androsaemifoMum. 

 Corolla 3-4.5 mm. long, its lobes erect or nearly so. 



Leaves and cymes glabrous, or somewhat pubescent. 

 Leaves petioled, mostly narrowed at the base. 



Leaves ovate-oblong to lancedlate, 2-4 times as long as wide ; 



flowers green to whitish. '■ 2. A. cannabiwwm. 



Leaves oblong-lanceolate, 4-6 times as long as wide,; flowers 

 white. 3. A. album. 



Leaves sessile or very nearly so, mostly cordate-clasping or obtuse 

 at the base. 4. A. hypericifoMum. 



Whole plant, including the cymes, densely softipubescent. 



5. A. pubescens. 



1. Apocynum androsaemifolium L. Honey Bloom. M. p. 738. Borders 



pf thickets and, fields. Early summer. , w 



2. Apocynum icannabinum L. Indian Hemp. , M. p. 739. Fields a,nd 



thickets. Summer. 



3. Apocynum album Greene, M- P- 739. On river-shores and similar 



situations. Summer. 

 Bucks— (P.). Lancaster— (P.). Northampton— (P.). 



4. Apocynum hypericifolium Ait. M. p. 739. Dry soil or along streams. 



Summer. 

 Salem — Banks of Delaware (C). 

 New Castle— Hamburg Cove, Edgemoor. 



5. Apocynum pubescens E. Br. M, p. 739. /.,-.•;, 



New Jersey— Common throughout the state (C). 



New Castle— Similar situations* as A. cannabinum, Jessups. Not rare. 



4. TBACHELOSPEBMUM Lemaire. 

 1, Trachelospermum difforme (Wait.) A. Gray. M. p. 739., Damp 

 grounds. Summer. 



