June, 1910.] The Genus Fraxinus in Ohio. 187 



times bisporangiate, usually diecious, in bractless pannicles, 

 isobilateral, usually apetalous and dicyclic, but some of the 

 primitive forms with a corolla; cycles usually tetramerous or 

 dimerous; calyx when present usually campanulate, persistent 

 or deciduous, sometimes much reduced; stamens united with the 

 base of the corolla when present; pollination usually ancmapholus; 

 ovulary biocular, ovules two in each cavity; fruit a one seeded 

 samara; seed pendulous. 



1. Fraxinus quadrangulata Mx. Blue Ash. Twigs glabrous 

 or very slightly pubescent when young, 4 sided, sometimes sharply 

 4-angled leaflets 7-11, ovate to oblanceolate, green on both sides, 

 sharply serrate or serrulate, long acuminate, upper leaflets usually 

 sessile, lower ones short petioled; flowers bisporangiate; corolla 

 wanting, calyx reduced to an obscure ring; samara linear oblong, 

 l}i to 2 inches long, 3-8 to ]/2 inches wide, blunt, body extending 

 half way to the apex. On rich limestone hills and sometimes 

 in fertile vallej^s. Ottawa, Hancock, Auglaize, Franklin, Licking, 

 Montgomery, Highland, Ross, Brown. Adams. 



2. Fraxinus nigra Marsh. Black Ash. Twigs and usually 

 the leaves glabrous; leaflets 7-11, sessile, green on both sides, 

 sometimes quite pubescent along the mid-rib, serrate or serrulate, 

 2J4 to 6 inches long, 1 to IK inches wide, ovate-lanceolate, with 

 a long, tapering acuminate apex and a narrow or rounded base ; 

 flowers imperfectly bisporangiate ; samara oblong to linear-oblong, 



1 to 1 5-8 inches long, }i to 3-8 inches wide; calyx wanting; 

 wing all around the flat body which extends to beyond the 

 middle. In swamps and wet woods. General in northern part 

 of the state, south to Preble, Green, Franklin and Harrison. 



3. Fraxinus pennsylvanica Marsh. Red Ash. Twigs, petio- 

 les, rachis and lower surface of leaflets velvety pubescent; leaflets 

 5-9, green on both sides, ovate to oblong, margin varying from 

 entire to serrate, apex acute or acmninate, SJ/^ to 6 inches long, 

 1)4 to 2 inches wide; calyx in the staminate flower obscurely 

 toothed, that of the carpellate flower deeply divided; samara 1 to 



2 inches long, 1-8 to 3-16 inches wide, wing decurrent, linear to 

 spatulate, about the same length as the body. Low, rich, moist 

 soil. General. 



4. Fraxinus lanceolata Borck. Green Ash. Twigs and 

 usually the leaves glabrous; leaflets 5-9, green on both sides, 

 lanceolate to oblanceolate, entire to denticulate, 3 to 7}^ inches 

 long, }4 to 2)4 inches wide, often pubescent on the veins beneath, 

 apex acute to long tapering; samara 1^ to 2J^ inches long, 

 1-8 to 14 inches wide; wing somewhat decurrent, spatulate; 

 body terete. Moist soil. General. 



5. Fraxinus biltmoreana Beadle. Biltmore Ash. Young 

 twigs very pubescent; leaflets 7-9, pale beneath, more or less 

 pubescent, especially along the veins beneath, ovate to ovate 

 lanceolate, margin entire or sometimes obscurely serrate, rachis 



