^0 spring Flora of Ohio. 



1. Genus VI'-TIS. — Flowers polygamo-flicecious, calyx very short, 

 with a nearly entire border or none at all ; petals separating only at 

 base ; flowers in a compound tliyrse, very fragrant. 



A. A tendiil [or infloresceyice opposite each leaf. 



Vi'-tis la-brus'-ca L. Northern Fox-Grape.— Branchlets and young 

 leaves very woolly; leaves large, entire or deeply lobed, slightly 

 dentate, continuing mostly woolly beneath ; berries large. 



A. Tendrils intermittent, none opposite each third leaf. 

 (b. Leaves pubescent and floccose beneath zvhen young'.] 



ViMis aes-ti-va'-lis Mx. Summer Grape. — Leaves large, entire or 

 more or less deeply and obtusely 3 to 5-lobed, very woolly and mostly 

 red or rusty when young. 



Vi'-tis bi'-col-or Le Conte. Summer Grape. — Differs from the preced- 

 ing in having the leaves smoothish when old and pale or glaucous be- 

 neath. 



(b. Leaves glabrous or short-hairy, incisely lobed or undivided.) 



ViMis cor-di-fo'-li-a Mx. Frost or Chicken Grape. — Leaves 3-4 in. 

 wide, not lobed or slightly o-lobed, cordate with a deep sinus, coarsely 

 and .sharply toothed; stipules small. 



Vi'-tis ri-pa'-ri-a Mx. Frost Grape. — Differing in the larger and 

 more persistent stipules (2-3 lines long); leaves more shining and 

 more usuall}' 3-lobed, with large, acute or acuminate teeth. 



2. Genus PAR-THE-NO-CIS'-SUS. (.-Jw/d'^A"'-^^.)— Calyx slightly 5- 

 toothed; petals concave, thick, expanding before they fall; leaves digi- 

 tate, leaflets oblong-lanceolate, sparingly serrate. 



Par-the-no-cis'-sus quin-que-fo'-ii-a (L) Planch. {Atnpelopsis qiiin- 

 guefolia Ms..) Virginia Creeper : American Ivy; Woodbine: Ampelopsis. — 



Woody vine, climbing extensively, clinging by disk-like terminations 

 of the tendrils, and on older parts by aerial rootlets. 



Par-the-no-cis'-sus vi-ta'-ce-a (Knerr.) Hitch. Virginia Creeper. — Dif- 

 fers from the preceding in having no aerial roots; canes smooth and 

 lighter colored; tendrils usually without disks; flowering and fruiting 

 earlier; fruit larger. Not reported, but doubtless occurring in Ohio. 



LIV. Order TIL-l-A'-CE-yE. LINDEN FAMILY. — Trees, with mucila- 

 ginous and fibrous bark; sepals deciduous; stamens polyadelphous. 



