VITACEAE (VINE FAMILY) 563 



?anceolate, rather coarsely serrate. Flower-clusters cymosely compound. Ten- 

 drils branched, their tips twining or affixing themselves by enlarged terminal 

 adhesive disks. (Name supposedly intended as a contraction of i/'cOSos, false, 

 and fiecJerci, the Ivy.) Ampelopsis Michx. , in part. Parthenocissds Planch. 



1. P. quinquefftlia (L.) Greene. Glabrous even upon the young shoots ; 

 leaflets dull green, decidedly paler beneath, AisimcWy petiolulate ; tendrils with 

 .=1-12 rather long branches mostly ending in adhesive disks; peduncles 1-4 cm. 

 lo]ig ; inflorescence paniculate, its main branches unequal ; fruit subglobose, 

 scarcely fleshy, about 6-7 mm. in diameter. {Ampelopsis Michx.; Partheno- 

 cissus Planch.) — Copses, etc., s. N. H., westw. and southw., common. (Mex., 

 W. I.) 



Var. hirsAta (Bonn) Rehder. Branchlets, tendrils, petioles, and to some 

 extent the leaflets pubescent at least when young ; aerial rootlets often present ; 

 otherwise like the typical form. {Ampelopsis quinquefolia, var. pubescens 

 Bailey.) — Vt. to la., southw. and south westw. 



Var. Saint-Paulii (Koehne & Graebner) Rehder. Somewhat pubescent upon 

 the younger parts ; aerial rootlets more prevalent than in the other forms of 

 the species ; leaflets cuneate to a sessile or scarcely petiolulate base ; oymules 

 somewhat racemosely arranged, rendering the elongated main branches of the 

 inflorescence subcylindric. — la., 111., and southwestw. 



2. P. vitScea (Knerr) Greene. Glabrous or sparingly pubescent ; leaflets 

 deep green, thin, somewhat shining above, scarcely paler beneath ; tendrils with 

 2-5 long twining branches, these only exceptionally ending in adhesive disks ; 

 aerial rootlets none ; peduncles mostly 4-8 cm. long ; inflorescence regularly 

 dichotomous, the primary branches nearly equal ; fruit somewhat obovoid, 

 6-10 mm. in diameter, more fleshy than in the preceding species. (Ampelopsis 

 quinquefolia of auth. , in part, not Michx. ; Parthenocissus vitacea Hitchc.) — 

 Moist woods, alluvial thickets, etc., centr. Me. to Assina. and Tex., common. 



2. CfSSUS L. 



Flowers perfect or sometimes polygamous, 4-merous or (in ours) 5-merou8. 

 Petals expanding. Disk cup-shaped, surrounding the base of the ovary. Berry 

 inedible, with scanty pulp. Seeds usually triangular-obovate. Tendrils in our 

 species few and mostly in the inflorescence. — A vast genus, mainly tropical. 

 (Greek name of the Ivy.) Ampelopsis Michx., in part. 



1. C. Ampeldpsis Pers. Nearly glabrous ; leaves heart-shaped or truncate at 

 the base; coarsely and sharply toothed, acuminate, not lobed; panicle small 

 and loose ; style slender ; berries of the size of a pea, l-.3-seeded, bluish or 

 greenish. (Ampelopsis coj-dafa Michx., not C cordata Roxb.) — River-banks, 

 Va. to Neb., Tex,, and Fla. June. 



2. C. arbbrea (L.) Des Moulins. (Pepper-vine.) Nearly glabrous, bushy and 

 rather upright ; leaves twice pinnate or ternate, the leaflets cut-toothed ; flowers 

 cymose ; calyx 5-toothed ; disk very thick, adherent to the ovary ; berries black, 

 obovoid. (C. stans Pers.; Ampelopsis arborea Rusby.) — Rich soils, Va. to 

 Mo. , and southw. 



•3. C. incisa (Nutt.) Des Moulins. A stout vine, with somewhat succulent 

 deeply Z-parted or pinnately Z-foliolate leaves, the leaflets ovate or obovate, 

 cuneate, coarsely and irregularly toothed ; inflorescence suggesting a compound 

 umbel. — Open sandy or rocky woods, ' ' Mo. ' ' and Kan. to Tex. and Fla. 



3. VinS [Tourn.] L. Grape 



Flowers polygamo-dioecious (some plants with perfect flowers, others stami- 

 nate with at most a rudimentary ovary), 5-merous. Calyx very short, usually 

 with a nearly entire border or none at all. Petals separating only at base and 

 falling off without expanding. Hypogynous disk of 5 nectariferous glands 

 alternate with the stamens. Berry pulpy. Seeds pyriform, with beak-like 

 base. — Plants climbing by the coiling of naked-tipped tendrils. Flowers in a 



