258 FLORA OF PHILADELFHIA. 



—Woods Mills (Wa.). Cumberland— \inel3Lnd (Ee.). Atlantic— Hsun- 

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

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

 (C). 



Family 5. APOCYNACEAE Lindl. Dogbane Family. 



Leaves alternate ; erect herbs. 1. Amsonia. 



Leaves opposite; vines or herbs. 



Flowers large, axillary, solitary. 2. Viiica. 



Flowers small, cymose. 



Erect or diffuse herbs ; corolla campanulate to urceolate. 



3. Apocynum. 



High-climbing vines; corolla funnelform. 4. Trachelospermum. 



1. AMSONIA Walt. 

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

 nurseries. Spring. 



2. VINCA L. 

 1. 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. androsaemifolium. 

 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 lanceolate, 2-4 times as long as wide; 



flowers green to whitish. 2. A. cannabinumn. 



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. hypericifolium. 



Whole plant, including the cymes, densely soft-pubescent. 



5. A. pubescens. 



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



of thickets and fields. Early summer. 



2. Apocynum cannabinum L. Indian Hemp. M. p. 739. Fields and 



thickets. Summer. 



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



situations. Summer. 

 BucTcs—{T.). Lancaster— {V.). Northampton— {P.). 



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



Summer. 

 /Saiem— Banks of Delaware (C). 

 New Cast ?e— 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. TEACHELOSPEEMUM Lemaire. 

 1. Tbachelospermum difforme (Walt.) A. Gray. M. p. 739. Damp 



grounds. Summer. 



