VITACEAE (VINE FAMILY) 315 



2. CEANOTHUS L. 



Unarmed or spinescent shrubs, with alternate or opposite leaves, and small 

 but showy white, blue, or purple usually fragrant flowers, often in long- 

 peduncled dense axillary or terminal clusters. Calyx 5-lobed. Petals 5, 

 hooded, long-clawed. Ovary immersed in the disk and adnate to it at the base, 

 3-lobed; disk adnate to the calyx; style short, 3-cleft. Fruit somewhat 3- 

 lobed, separating at maturity into 3 nutlets. 



Shrubs without spines. 



Leaves large, leathery, shining . . . . . . . 1. C. velutinus. 



Leaves small, thin, softly pubescent . . . . . . . 2. C. mollissimus. 



Shrubs with spines 3. C. Fendleri. 



1. Ceanothus velutinus Dougl. Hook. Fl. Bor. Am. 1: 125. pi. 45. 1830. 

 A smooth shrub 7-14 dm. high, growing in dense clumps or patches: leaves 

 orbicular-elliptic or elliptical-ovate, obtuse at both ends, coriaceous, shining 

 above (as if varnished), balsamic fragrant, lighter beneath and slightly pu- 

 bescent, strongly 3-ribbed, 5-10 cm. long, on short stout petioles, persistent: 

 panicles axillary, compound, long-peduncled: flowers white: styles as long as 

 the stamens. MOUNTAIN BALM. Common on mountain sides; Colorado, 

 northward and westward. 



2. Ceanothus mollissimus Torr. Robins. Syn. Fl. 1: 409. 1897. A low 

 shrub, persistently dingy villous-tomentose: the dull leaves usually broadly 

 elliptical, crenate-serrulate, obtuse or subacute at both ends: inflorescence of 

 two to several terminal and axillary crowded corymbs on slender branchlets: 

 flowers white: capsule nearly globose, somewhat lobed at top, smooth and 

 crestless. C. ovatitts. (C. pubesccns Rydb.) Colorado and Wyoming. 



::. Ceanothus Fendleri Gray, PL Fendl. 29. 1848. A thorny or spinose low 

 bushy shrub, rarely nearly unarmed, 4-8 dm. high: leaves entire, silky- 

 pubescent beneath, narrowly oblong to elliptic, 10-25 mm. long, somewhat 

 narrowed and cuneate at base, obtuse or acute at apex: flowers in simple 

 terminal racemes, white. C. xtibsericeus Rydb. Bull. Torr. Bot. Club 31: 564. 

 1904. Southern Wyoming and southward to New Mexico. 



71. VITACEAE Lindl. VINE FAMILY 



Woody plants, mostly climbing by tendrils. Branchlets articulated and 

 often thickened at the nodes. Leaves alternate, palmately veined or lobed 

 or compound. Flowers small, greenish or whitish, in a panicled cymose- 

 thyrsoid inflorescence, very commonly polygamous or dioecious. Calyx mi- 

 nute, truncate or 4-5-toothed, caducous or early deciduous. Petals 4 or 5, 

 valvate. Stamens the same number and opposite. Ovules in pairs or solitary 

 in the cells of the ovary. Fruit a berry. 



Leaves simple . . . . . . . . . . .1. Vitis. 



Leaves compound 2. Parthenocissus. 



1. VITIS Tourn. GRAPE 



Plants climbing by the coiling of forked naked-tipped tendrils, with simple 

 cordate palmately veined lobed leaves and a compound thyrsus of very fra- 

 grant 5-merous flowers. Calyx minute, filled with a glanduliferous fleshy 

 disk which surrounds the ovary and bears the small green petals and the sta- 

 mens. Petals coherent, falling together without opening. Fruit an edible 

 berry with pour-shaped seeds. 



1. Vitis vulpina L. Sp. PL 203. 1753. Glabrous or somewhat pubescent 

 on the veins on the lower face of the leaves: leaves thin, shining, incisely 

 3 or more-lobed, the middle one long, all sharply serrate: berries bluish-black, 



