382 CONVOLVULACEAE 



2. CONVOLVULUS L. Sp. PI. 153. 1753. 



Herbs with trailing or twining, sometimes suffrutescent stems arising from slender 



mostly perennial roots or rootstocks. Leaves alternate, usually petioled, entire or dentate, 



and commonly cordate or sagittate. Pedicels or peduncles usually bearing a pair of bracts 



distant from or closely subtending the calyx. Flowers solitary or clustered in the axils, 



showy, white, pink or purple. Sepals about equal or the outer pair larger. Corolla fun- 



nelform or campanulate, plaited, usually 5-angled or 5-lobed. Stamens inserted on the 



corolla-tube, included; filaments slender or dilated at base. Ovary 2-celled or rarely 1- 



celled, 4-ovuled; style filiform; stigmas 2, linear-oblong or ovoid. Capsule globose or 



subglobose. Seeds usually 4, glabrous. [Name Latin, meaning to roll together or entwine.] 



A genus of about 200 species, widely distributed in temperate and tropical regions. Type species. Con- 

 volvulus septum L. 



Perennials; corolla showy, 2-S cm. long, not deeply cleft. 



Bracts sepal-like, closely subtending and more or less enclosing the calyx. 



Leaves reniforra, fleshy; low or prostrate seaside herbs; corolla rose-purple. 1. C. Soldanella. 



Leaves various but not reniform, slightly or not at all succulent; corolla sometimes purple or pinkish, 

 but commonly white or yellowish. 

 Stems commonly twining or trailing. 



Stems entirely herbaceous, from slender creeping rhizomes. 



Bracts about as long as the sepals and usually concealing them; leaves hastate or in the 



variety sagittate. 2. C. sepium. 



Bracts about half as long as the sepals, broadly oblong, greenish; leaves broadly oval with 

 a narrow sinus. 3. C. Binghamiae. 



Stems woody at least at base, commonly elongated and climbing over bushes, or in varieties 

 of aridus, often shorter and little or not at all climbing. 



Bracts suborbicular to oblong-oval, rounded or obtuse at apex, subcordate at base, 

 membranous and purple; corolla 3.5-6 cm. long, white or purple-striped exteriorly 

 on the folds; peduncles commonly 2-flowered, sometimes 1- or 3-flowered. 

 Leaves fleshy; bracts suborbicular to broadly oval, usually well-exceeding the calyx; 



insular species. 4. C. macrostegius. 



Leaves not fleshy; bracts oval to broadly oblong, about equaling the calyx. 



5. C. cyclostegius. 

 Bracts similar to the sepals, ovate-lanceolate, usually acute or acutish at apex, obtuse at 

 base, not colored at all or only slightly; peduncle 1-flowered; corolla cream- white not 

 purplish, 2-3 cm. long. 6. C. aridus. 



Stems very short and erect, or 1—4 dm. long and prostrate. 



Plants glabrous; leaves deltoid. 7. C. nyctagineus. 



Plants variously pubescent. 



Plants thinly pubescent or hispidulous; corolla white. 8. C. subacaulis. 



Plants more or less densely tomentose and hoary or canescent; corolla cream-yellow. 



Plants densely villous-tomentose with spreading hairs; bracts mostly ovate and as 



large or larger than the sepals. 9. C. malacophyllus. 



Plants minutely tomentose with very short hairs; bracts linear-lanceolate, narrower 

 and shorter than the sepals. 10. C. tomentellus. 



Bracts more or less distant from the calyx and not simulating it. 



Bracts hastately lobed, resembling a pair of reduced leaves; plants somewhat canescent with rather 



thm pilose tomentum. 11. C. fulcratus. 



Bracts entire. 



Plants minutely and rather thinly tomentulose throughout; bracts linear to linear-oblong, attached 

 only a short distance below and partly overlapping the base of the calyx ; corolla yellowish. 



12. C. polymorphus. 



Plants glabrous throughout or often more or less pubescent in C. arvensis; corolla white or more 

 or less flushed with pink. 



Bracts broadly oblong to oval, attached only a short distance below the calyx and their upper 

 half overlappmg its base; stems creeping 2-4 dm. long. 13. C. Pierscmii. 



Bracts linear-lanceolate to linear-subulate, usually attached about their own length or more 

 below the calyx. 



Semiwoody climbers or erect much-branched plants; native species of hills and deserts. 

 Stout semiwoody climbers; basal lobes of the leaves broad usually toothed. 



14. C. occidcntalis. 

 Erect much-branched desert plants; leaves very narrow, basal lobes linear and entire. 



15. C. longipes. 

 Slender trailing or twining herb, often pubescent; bracts minute or wanting; corolla 



1.5-2.5 cm. long; introduced. 16. C. arvensis. 



Annuals; corolla about 6 mm. long, deeply 5-cleft; leaves oblanceolate, entire. 17. C. simulans. 



1. Convolvulus Soldanella L. Beach Morning-glory. Fig. 3853. 



Convolvulus Soldanella L. Sp. PI. 159. 1753. 

 Calystegia Soldanella R. Br. Prod. 484. 1810. 

 Calystegia reniformis R. Br. loc. cit. 



Stems creeping, short and fleshy, from deep-seated rootstocks, herbage glabrous and fleshy. 

 Leaves long-petioled, reniform, entire or obscurely angled, 2-5 cm. broad, usually emarginate ; 

 bracts round-oval, 8-12 mm. long, obscurely cordate, mostly shorter than the sepals; sepals 

 broadly ovate-oval, often mucronate at apex, usually 15-20 mm. long in fruit; corolla rose- 

 purple, short-funnelform, 4-6 cm. long; stigmas ovate; capsule 12-15 mm. long, subglobose. 



Beach sands; along the Pacific Coast, from Grays Harbor, Washington, to San Diego, California; also 

 Pacific shores of Central America, Chile, New Zealand, New Caledonia, Java, and other islands of the south- 



