556 VITACEAE 



Family 80. VITACEAE. Grape Family.' 



Woody vines, climbing by means of tendrils. Flowers perfect, polj^ga- 

 mous, or dioecious, in axillary clusters. Sepals and petals 4 or 5, the latter 

 valvate. Stamens as many as the petals and opposite them. Gynoecium 

 of 2, or rarely 3-6, united carpels; styles united; stigmas capitate or peltate. 

 Fruit a berry; seeds 1 or 2 in each cavity. 



Hypogynous disk present; leaves in our species simple, palmately veined and usually 



lobed. 1. ViTis. 



Hypogynous disk wanting; leaves palmately 5-7-foliolate. 2. P.^JiTHENOCisaus. 



1. VITIS (Tourn.) L. Grape. 



CUmbing or trailing vines, with shreddy bark and simple tendrils. Leaves 

 alternate, simple, palmately lobed, petioled; stipules small and caducous. Flow- 

 ers dioecious, polygamo-dioeceous, or rarely perfect. Disk hypogynous. Calyx 

 minute. Petals caducous, coherent at the apex as a cap. Stamens exserted. 

 Ovary 2-celled, rarely 5- or 4-celled. Berry pulpy. Seeds few, pear-shaped. 



Twigs and leaves somewhat puberulent when young, glabrate in age, except the veins 



and their axils beneath; vine high-cUmbing. 1. V. vulpina. 



Twigs and leaves white-floccose when young; plant scarcely climbing. 2. V. arizonica. 



1. V. vulpina L. High climbing vine; leaf-blades thin, broadly cordate, 

 with a broad sinus, often somewhat 3-lobed, deeply and irregularly serrate, 

 5-12 cm. long, 6-15 cm. wide; panicles 5-12 cm. long; berries 1 cm. or less in 

 diameter, bluish or purplish black, with a bloom, very sour. Woods and river 

 banks: N.B.— W.Va.— Tex.— N.M.— Wyo. Plain— Mont. Ap-Je. 



2. V. arizonica Engekn. Weak, branched vine, scarcely climbing; leaf- 

 blades cordate-ovate, with a broad sinus, usually indistinctly lobed, dentate, 

 with numerous small teeth, white-floccose when young, becoming more glabrate 

 in age; panicles 5-8 cm. long; berries black, about 1 cm. in diameter, pleasant- 

 tasting. (?) V. boulderensis Daniels. River banks and canons: N.M. — Colo. — 

 Utah — s Calif.; Mex. Son. — Submont. Ap-Je. 



2. PARTHENOCiSSUS Planch. Virginia Creeper, American Ivy, 



Woodbine. 



Climbing or trailing vines, with forking tendrils, their branches often with 

 adhesive disks. Leaves alternate, pahnately 5-7-foliolate. Flowers perfect or 

 polygamo-dioecious, in compound cymes. Sepals and petals 5. Disk obsolete 

 or wanting. Stamens 5. Ovary 2-celled, sessile. Berries with scant pulp, 

 inedible. Seeds more or less 3-angled. [Psedera Neck.] 



Aerial rootlets present; tendiils with disks. 1. P. quinquefolia. 



Aerial rootlets lacking; tendrils without disks. 2. P. vitacea. 



1. P. quinquefolia (L.) Planch. Tall vine, climbing; branches warty; 

 leaves usually 5-foliolate; leaflets ovate or obovate to oblong-lanceolate, acute 

 or short-acuminate, serrate above the middle, teeth directed forward; corymbs 

 8-12 cm. broad; berries subglobose, 8-9 mm. in diameter, blue, with a scant bloom. 

 Woods and banks: Que. — Fla. — Tex. — S.D. — Man. Plain — Submont. Je-Jl. 



2. P. vitacea (Knerr) Hitchcock. Straggling vine, with long tendrils, and 

 smoother bark; leaflets 5-6, thin, 4-10 cm. long, lanceolate or oval, acuminate, 

 serrate, with large, often flaring, lanceolate teeth; corymb about 5 cm. broad; 

 berries 5-7 mm. in diameter, bluish black. P. quinquefolia laciniata Planch. 

 Woods and banks: Mich. — Ohio — N.M. — Ariz. — Wyo. Plain — Subtnont. Je- 

 Jl. 



Family 81. MALVACEAE. Mallow Family. 



Herbs (all ours), or rarely shrubs or trees, with alternate, palmately ribbed 

 and usually lobed leaves, often with stellate or branched pubescence. Flow- 

 ers perfect, regular. Calyx of 5, more or less united valvate sepals. Petals 



