COA r VOLV VLA CEA £. 7 S3 



6. CONVOLVULUS L. (See Appendix.) 



Herbs (the following species perennials with slender roots or rootstocks) with 

 trailing, twining or erect stems. Leaves mostly cordate or sagittate and petioled. 

 Flowers axillary, large. Sepals nearly equal or the outer larger, the calyx bract- 

 less or with a pair of bracts at its base. Corolla funnelform or campanulate, the 

 limb plaited, 5 -angled, 5-lobed, or entire. Stamens inserted on the tube of the 

 corolla, included. Ovary 1-2-celled, 4-ovuled; style filiform; stigmas 2, filiform, 

 oblong, or ovoid. Capsule globose, 1-4-celled, 2-4-valved. Seeds glabrous. 

 [Latin, to roll together, or entwine.] About 175 species, of wide distribution. 

 Besides the following, some 25 others occur in the southern and western U. S. 



Calyx with 2 large bracts at the base, which enclose it. (Genus Volvulus Medic.) 

 ' Stems trailing or climbing. 



Leaves hastate, the auricles often dentate. 1. C. septum. 



Leaves sagittate, the auricles rounded, entire. 2. C. repens. 



Stem erect or ascending ; flowers white: bracts not cordate. 3. C. spithamaeus. 

 Calyx not bracted; peduncle bracted at the summit. 



Glabrous or nearly so; leaves entire, auriculate. 4. C. arvensis. 



Canescent; leaves with 2-4 basal lobes. 5. C. incanus. 



i. Convolvulus sepium L. Hedge or Great Bindweed. Rutland 

 Beauty. (I. F. f. 2951.) Stems 1-3.5 m. long. Leaves slender-petioled, triangu- 

 lar in outline, hastate, 5-13 cm. long, acute or acuminate, the basal lobes divergent, 

 usually acute, angulate- dentate or entire; peduncles i-flowered, longer than the 

 leaves; flowers pink with white stripes or white throughout, about 5 cm. long; 

 bracts at the base of the flower large, ovate, cordate; stigmas oblong. In fields 

 and thickets, usually in moist soil. N. S. to N. Car.. Mont., Utah and Kans. Also in 

 Europe and Asia. June-Aug. The pink-flowered American plant (C. sepium 

 Amtricanus Sims ; C. Americanus Greene) is, perhaps, specifically distinct from 

 the European. 



Convolvulus Japonicus Thunb. , a species with narrow hastate leaves and smaller pink 

 flowers, cultivated in a double-flowered form, has in this form escaped from cultivation 

 from N. H. to D. C. and Mo. 



2. Convolvulus repens L. Trailing Bindweed. (I. F. f. 2952.) Pubes- 

 cent or tomentose; stems 3-9 dm. long. Leaves ovate or oblong, 2-5 cm. long, 

 sagittate or cordate at the base, entire, the basal lobes rounded, scarcely or not 

 at all divergent; peduncles i-flowered, equalling or longer than the leaves; flowers 

 white (sometimes pink?) about 5 cm. long; calyx enclosed by 2 ovate slightly 

 cordate bracts; stigmas oblong. In fields, Va. to Fla., Dak. and Tex. May- Aug. 



3. Convolvulus spithamaeus L. Upright Bindweed. (I. F. f. 2953.) 

 Pubescent or glabrate; stem erector ascending, or the summit sometimes feebly 

 twining, 1. 5-3 dm. high. Leaves oval, short-petioled or the uppermost sessile, 

 usually obtuse at both ends, 2-6 cm. long; peduncles i-flowered, longer than the 

 leaves; flowers white, nearly 5 cm. long; calyx enclosed by 2 large oval acutish 

 bracts which are narrowed at both ends; stigmas oblong, thick. In dry sandy or 

 rocky fields or on banks, N. S. to the N. W. Terr., Fla. and Ky. May-Aug. 



4. Convolvulus arvensis L. Small Bindweed. (I. F. f. 2954.) Gla- 

 brous, or nearly so; stems slender, 3-8 dm. long. Leaves slender-petioled, ovate 

 or oblong, entire, sagittate or somewhat hastate, 2-5 cm. long, the basal lobes 

 spreading, acute; peduncles 1-4 flowered, shorter than the leaves, 1-3 bracted at 

 the summit; sepals oblong, obtuse, 3 mm. long; corolla pink or nearly white, 

 1.5-2.5 cm. broad; stigmas linear. In fields and waste places, N. S. to Ont., N.J., 

 Neb. and Kans. Nat. from Europe. May-Sept. 



5. Convolvulus incanus Vahl. Hoary Bindweed. (I. F. f. 2955.) Finely 

 and densely canescent, 3-9 dm. long. Leaves short-petioled, lanceolate, ovate to 

 linear in outline, 2-5 cm. long, usually with 2-4 divergent lobes at the base, or 

 the lower pair of lobes reflexed, obtuse and mucronulate; peduncles l-2-flowered, 

 as long as or longer than the leaves: sepals oblong, about 6 mm. long; corolla 

 white to rose-color; stigmas narrowly linear; capsule globose. In dry soil, Neb., 

 Kans. and Ark. to Ariz., Mex. and Tex. April- Aug. 



