182 American Midland Naturalist Monograph No. 7 



4. Wing of the samara almost entirely terminal ; leaflets ovate- 

 lanceolate or oval, entire or nearly so, glabrous beneath or 

 pubescent; leaf -scars deeply notched at the top; woods, 

 common throughout 111. White Ash. [F. biltmoreana 

 Beadle] F. americana L. 



4. Wing extending down the sides of the samara; leaflets elliptic- 



lanceolate, usually serrate, acuminate at each end, glabrous 

 except along the midvein beneath ; leaf-scars nearly straight 

 at the top; low woods and along roads, common. Green 



Ash F. lanceolata Borkh. 



3. Calyx none or minute; body of the samara flattened, the wing 

 decurrent; leaflets 7-11. 



5. Twigs terete; lateral leaflets sessile; flowers polygamous; wet 



ground, local ; chiefly in the n. part of the state, but extend- 

 ing southward along river valleys to Rock Island, Peoria, 



and Wabash counties. Black Ash F. nigra Marsh. 



5. Twigs usually prominently cjuadrangular; lateral leaflets 

 shortly petiolulate; flowers perfect; woods, locally nearly 

 throughout 111. Blue Ash F. quadrangulata Michx. 



2. Forestiera Poir. — Swamp-privet 

 F. acuminata (Michx.) Poir. River banks and swamps, extending 

 northward to Wabash and Lawrence coimties, and in the w. part of 111. 

 to Fulton Co. Apr.-May. 



3. Ligustrum L. — Privet 

 L. vulgare L. Commonly cult, and occasionally persisting about 

 abandoned dwellings; sometimes spontaneous in woods and along 

 roads; native of Europe. June. 



4. Syringa L. — Lilac 



S. vulgaris L. Occasionally persisting about abandoned dwellings; 

 native of s.e. Eur. May. 



99. Apocynaceae Lindl. — Dogbane Family 



1. Leaves alternate; flowers in terminal corymbiforni cymes; corolla salver- 

 form, purple 1. Amsonia 



1. Leaves opposite. 



2. Leaves not evergreen; flowers not solitary or blue. 



3. Climbing plants; corolla funnelform, yellowish; flowers fragrant 



2. Trachelospermu?n 



3. Erect plants; corolla campanulate or cylindrical, pink or whitish 



3. Apocynum 



2. Leaves evergreen; stems trailing; flowers solitary, axillary, blue 4. Vinca 



1. Amsonia Walt. 

 A. tabernacmontana Walt. Moist ground, locally throughout 111., 

 except the northern counties. May-June. 



