OLEACEAE. 253 



Order 4. GENTIANALES. 



Stamens (usually 2) fewer than the corolla-lobes, or corolla none; trees or 



shrubs. Fam. 1. Oleaceae. 



Stamens as many as the corolla-lobes; mostly herbs. 



Stigmas distinct; juice not milky; ovary 1, compound. 



Ovary 2-celled; leaves stipulate, or their bases connected by a stip- 



ular line. Fam. 2. Loganiaceae. 



Ovary 1-celled, leaves not stipulate. 



Leaves opposite or rarely verticillate; corolla -lobes convolute 



or imbricated in the bud. Fam. 3. Gentianaceae. 



Leaves basal or alternate ; corolla-lobes induplicate-valvate in 

 the bud; marsh or aquatic herbs. Fam. 4. Menyanthaceae. 

 Stigmas united; juice milky; ovaries 2. 



Styles united; stamens distinct; pollen of simple grains. 



Fam. 5. Apocynaceae. 

 Styles distinct ; stamens mostly monadelphous ; pollen-grains united 

 into waxy masses. Fam. 6. Asclepiadaceae. 



Family L OLEACEAE Lindl. Olive Family. 



Fntit a loculicidal capsule; leaves simple; flowers complete. 1. Syringa. 



Fruit a samara; leaves pinnate; flowers mostly dioecious; corolla want- 

 ing. 2. Fraxinus. 

 Fruit a drupe or berry; leaves simple. 



Flowers polypetalous ; petals linear. 3. CMonantlius. 



Flowers gamopetalous ; petals not linear. 4. Ligustrum. 



1. SYRINGA L. 

 1. Syringa vulgaris L. Lilac. M. p. 724. Escaped from cultivatioij. 

 Spring. 



2. FRAXINUS L. Ash. 



Lateral leaflets stalked; calyx present in the fertile flowers. 



Body of the samara terete or nearly so, the wing chiefly terminal. 

 Wing almost entirely terminal. 



Foliage and twigs glabrous or nearly so. 1. F. Americana. 

 Foliage and twigs pubescent. 2. F. Biltmoreana. 



Wing manifestly extending down on the sides of the body. 

 Wing of samara spatulate. 



Foliage, twigs and pedicels glabrous or very nearly so. 



3. F. lanceolata. 

 . ' Foliage, young twigs and pedicels velvety-pubescent. 



4. F. Pennsylvanica. 

 Wing of samara long-linear. 5. F. Barlingtonii. 



Body of the samara flat, the wing extending all around it. 



Q. F. quadratigulata. 

 Lateral leaflets sessile; calyx none; samara winged all around. 



7. F. nigra. 



1. Fraxinus Americana L. White Ash. M. p. 724. Rich woods. Spring. 



2. Fraxinus Biltmoreana Beadle. M. p. 725. Woods. Spring. 



Lancaster— McCslW'b Ferry (P.). 



3. Fraxinus lanceolata Borck. Greev Ash. M. p. 725. Along streams. 



. Spring, 

 Philadelphia— yVissahickon (U. C. S.), Angora (Te.). Lancaster:^ 

 Susquehanna River below Peach Bottom, Dr. Geo. Smith (B. Sm.). 

 .'. GZoucesfer— Mullica Hill (C), Center Square (He.). Mercer— Trenton 

 •■•(C). ff«riterdo)i— Stockton (C). 



