CONVOLVULACEAE (MORNING-GLORY FAMILY) 393 



seeds rusty-pubescent. BUSH MORNING-GLORY. On dry banks; through east- 

 ern Wyoming and Colorado. 



3. Ipomoea purpurea (L.) Roth. Bot. Abh. 27. 1787. An annual with 

 long, slender, twining stems: leaves cordate, entire: peduncles 5-15 cm. long, 

 bearing 1-5 umbellately clustered flowers; the pedicels thickened and refracted 

 in fruit: sepals lanceolate, somewhat hirsute, 10-12 mm. long: corolla about 

 5 cm. long, purple to white and of ten variegated : capsule depressed-globose. 

 The common MORNING-GLORY. Sparingly escaped from cultivation. 



4. Ipomoea mexicana Gray, Syn. Fl. 2: 210. 1878. A slender annual 

 with angulate, 3-lobed leaves or some entire; the later ones deeply-lobed, the 

 lobes ovate-lanceolate, often cordate at base: peduncles slender, 1-3-flowered; 

 the pedicels as long as the lanceolate sepals: sepals hispid or lightly hirsute, 

 about 12 mm. long: corolla violet-purple, rarely 3 cm. long. Probably 

 within our range on the south. 



5. Ipomoea hederacea Jacq. Ic. Rar. pi. 36. 1781. Stem slender, 6-15 dm. 

 long, retrorsely hairy: leaves deeply 3-lobed; the lobes ovate to ovate- 

 lanceolate, and the middle one narrowed at base, the lateral ones often repand- 

 lobed: peduncles short, 1-3-flowered, pedicels wanting or nearly so: sepals 

 linear-attenuate from a dilated and densely long-villous-hirsute base, 2-3 cm. 

 long, at length recurved: corolla sky-blue, with whitish tube, 4-5 cm. long: 

 capsule depressed-globose. IVY-LEAVED MORNING-GLORY. Introduced from 

 tropical America. 



3. CONVOLVULUS L. BINDWEED 



Ours slender twining or trailing perennial herbs, generally with cordate 

 or sagittate-petioled leaves and large axillary flowers. Sepals equal or un- 

 equal, often a pair of bracts at their base. Corolla campanulate to funnelform, 

 glicate; the limb entire or lobed. Stamens inserted on the tube, included, 

 tigmas 2, filiform or oblong. Capsule globose, 2-4-valved, usually 2-celled. 



Calyx subtended and inclosed by 2 bracts. 



Leaves hastate, glabrate . . . ."_ ^ ,.,.; f , .... . . 1. C. sepiuna. 



Leaves oblong-cordate, pubescent . . . . . . . 2. C. repens. 



Calyx not subtended by bracts. 



Leaves broad, entire, glabrous 3. C. arvensis. 



Leaves narrow, lobed at base, canescent . . . . . . 4. C. incanus. 



1. Convolvulus sepium L. Sp. PI. 153. 1753. Glabrous or slightly pubes- 

 cent, freely twining: leaves slender-petioled, deltoid-hastate, 5-12 cm. long, 

 acute or acuminate, the basal-lobes acute, divergent, entire or angulate toothed: 

 peduncles elongated, 1 -flowered; bracts cordate-ovate: corolla broadly funnel- 

 form, pink or white: stigmas oblong. HEDGE BINDWEED. Introduced in 

 many localities. 



2. Convolvulus repens L. Sp. PI. 153. 1753. Pubescent or tomentose; 

 stems prostrate-trailing: leaves oblong, with sagittate or cordate base, the 

 lobes entire, obtuse or rounded: flowers much as in the preceding; corolla 

 usually white. TRAILING BINDWEED. Frequent in fields. 



3. Convolvulus arvenis L. Sp. PI. 153. 1753. Nearly glabrous, the twining 

 stems very slender, 4 dm. or more long: leaves oblong-sagittate or somewhat 

 hastate, 3-5 cm. long, the basal-lobes short, acute: bracts at base of pedicel 

 small and subulate: corolla white or tinged with rose, 2-3 cm. long: stigmas 

 filiform. Sparingly as an introduced weed. 



4. Convolvulus incanus Vahl. Symb. 3: 23. 1794. Canescent with a 

 short and close silky-pubescence; stems filiform, 3-10 dm. long, mainly pro- 

 cumbent: leaves short-petioled, polymorphous; some simply lanceolate- or 

 linear-sagittate or hastate, obtuse and mucronate, entire, and with the nar- 

 row elongated basal lobes entire or 2-3-toothed; usually variously cleft or 

 parted at base, the lobes divergent or reflexed: peduncles equaling the leaf, 

 1-2-flowered: corolla white or tinged with rose, the angles salient-acuminate, 

 10-14 mm. long. Throughout the eastern part of our range to Texas, 



