VITACEAE (VINE FAMILY) 563 



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

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

 adhesive disks. (Name supposedly intended as a contraction of \ped8os, false, 

 and Hedera, the Ivy.) Ampklopsis Michx., in part. Parthexocissl-s Planch.' 



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

 leaflets dull green, decidedly paler beneath, d\^i\r\Q,l\y petiolulate ; tendrils irith 

 6-12 rather long branches mt)Stly ending in adhesive disks ; peduncles 1-4 cm. 

 long; inflorescence paniculate, its main branches unequal; fruit sul)globose', 

 scarcely fleshy, about 6-7 mm. in diameter, (/impel opsis Michx.; Partheno- 

 cissus Planch.) — Copses, etc., s. N. H., westw. and southw.' common. CAIex 

 W.I.) ^ ■' 



Var. hirsuta (Donn) Rehder. Branchlets, tendrils, petioles, and to some 

 extent the \efiQets pubesce7it at least when young ; aerial rootlets often present ; 

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

 Bailey.) — Vt. to la., southw. and southwestw. 



Var. Saint-Paiilii (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., Ill, and southwestw. 



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

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

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

 atrial 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 oi auth., in part, not Michx.; Parthenocissus vitacea Hitchc.) — 

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



2. cissus 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. — Avast 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-o-seeded, bluish or 

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

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



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

 rather upright; leaves twice pinnate or tcr?i, f.e. the leaflets cut-toothed ; flc-wers 

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

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

 Mo. , and southw. 



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

 deeply S-parted or pinnately S-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. 



8. VillS [Tourn.] L. Grape 



Flowers poly gam o-dioecious (some plants with perfect flowers, others staml- 

 nate with at most a rudimentary ovary), 6-merous. Calyx very short, usually 

 ?7ith a nearly entire border or none at all. Peta,ls 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 



