564 VITACEAE (VINE FAMILY) 



compound thyrse, very fragrant ; pedicels mostly umbellate-clustered. Leaves 

 simple, rounded and heart-shaped. (The classical Latin name.) 



Lower surface of leaves velvetv-tomentose or covered with flocculent wool. 



Berries large, 14-18 mm. in diameter 1. V. iabruaca. 



Berries smaller, rarely over 12 mm. in diameter. 

 Branchlets terete or nearly so, glabrous, glabrate, or retaining only floccu- 

 lent remnants of wool. , ,, , X 

 Branchlets. petioles, and lower surface of leaves covered with somewhat 



persistent reddish flocculent wool 2. V. aeatitalis. 



Branchlets even when young glabrous or nearly so ; lower surface of 



leaves very pale and glaucous, at length nearly smooth . . . 3. F. bicolor. 

 Branchlets distinctly angled, covered with a fine dense and persistent 



grav tomentum 4, F. cinerea. 



lower surface of the leaves merely pubescent (chiefly along or in the axils of 



the nerves) or glabrous. ttt.- 



Leaves very glaucous or even whitened beneath 3, V. Mcolor. 



Leaves green beneath. 



Bark of stem loose and shredding; berries 7-10 mm. in diameter. 

 Leaves ovate to suborbicular ; berries mostly acid ; tall climbers. 

 Teeth of leaves narrowly deltoid or even lanceolatf^, sharply acumi- 

 nate, and often slightly falcate ; berries blue, with copious bloom 6. V. Tulpina. 

 Teeth of leaves broadly deltoid, cuspidate; berries black or dark 

 purple, with httle or no bloom. 

 Leaves scarcely or not at all 3-lobed ; the basal sinus mostly rather 



deep, narrow, and acutish 5. F. cordifolia. 



Leaves habitually and rather incisely 3(-5)-lobed ; the basal sinus 



mostly wide, shallow, and rounded 7. F. palmata. 



Leaves reniform or depressed-ovate, broader than long ; berries sweet ; 



bushy or sprawling 8. F. I'upestrift. 



Bark of stem close and firm ; berries 12-18 mm. in diameter . . . 9. V. rotundifoUa 



§ 1. EUVItIS Planch. Baric loose and shreddy ; tendrils forked; nodes solid. 

 * A tendril {or inflorescence^ opposite each of several successive leaves. 



1. V. labriisca L. (Northern Fox G.) Branchlets and young leaves very 

 woolly ; leaves large, entire or deeply lobed, slightly dentate, continuing rusty- 

 woolly beneath ; fertile panicles compact ; berries large. — Moist or dry thickets, 

 N. E. to the Allegheny Mts,, and s. to Ga.; also n. w. Ind. — Fruit ripe in Sept. 

 or Oct., dark purple or amber-color, with a tough musky pulp. Improved by 

 cultivation, it has given rise to the Isabella, Catawba, Concord, and other 

 varieties. 



* * Tendrils intermittent {none opposite each third leaf). 

 •*- Leaves pubescent and floccose, especially beneath and when young. 



2. V. aestivalis Michx. (Summer or Pigeon G.) Branchlets terete^ loosely 

 pubescent ; leaves large, unlobed or more or less deeply and obtusely 3-5-lobed, 

 with short broad teeth, very woolly and mostly red or rusty when young, tawny- 

 flocculent even in age; petioles rather short, pubescent ; berries middle-sized, 

 black, with a bloom, in compact bunches. — Thickets, s. N. H. to Fla., w. to 

 Kan, and Tex. May, June. — Berries pleasant, ripe in Sept. 



3. V. bicolor Le Conte. (Summer G.) Branchlets terete, glabrous or nearly 

 so ; petioles long, glabrous ; leaves thickish, very glaucous and early glabrate 

 beneath ; teeth less salient ; otherwise resembling the preceding. — N. H. to 

 N. C, and westw. 



4. V. cinerea Engelm. (Sweet Winter G.) Branchlets angular; pubes- 

 cence whitish or grayish, persistent ; leaves entire or slightly 3-lobed ; inflores- 

 cence large and loose ; berries small, black, without bloom. — Centr. 111. to Kan. 

 and Tex. 



>- H- Leaves glabrous and mostly shining, or short-hairy especially on the ribs 

 beneath, incisely lobed or undivided. 



5. V. cordifblia Michx. (Frost or Chicken G.) Leaves 7.5-10 cm. wide, 

 unlobed or slightly 3-lobed, cordate with a deep acute sinus, acuminate, coarsely 

 and sharply toothed ; stipules small ; inflorescence ample, loose ; berries small, 

 hiack and shining, very acerb, ripening after frosts ; seeds 1 or 2, with promi- 

 ti.ent rhaphe, (F. Baileyana Munson.) — Thickets and stream-banks, Pa., s 



