VITACEAE (VINE FAMILY) 563 



lanceolate, 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/'eOSos, false, 

 and Hedera, the Ivy.) AMPELOPSIS Michx. , in part. PARTHENOCISSUS Planch. 



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

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

 5-12 rather long branches mostly ending in adhesive disks ; peduncles 1-4 cm. 

 long ; 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 south w., common. (Mex., 



Var. hirsuta (Donn) Eehder. 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., south w. 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; cymules 

 somewhat racemosely arranged, rendering the elongated main branches of the 

 inflorescence subcylindric. la., 111., and south westw. 



2. P. vitacea (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. CtSSUS L. 



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

 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. Ampel6psis 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, 1-3-seeded, bluish or 

 greenish. (Ampelopsis cordata Michx., not G. cordata Roxb.) River-banks, 

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



2. C. arborea (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 ^-parted or pinnately 3-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. ViTIS [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 



