534 CONVOLVULACE^E. Convolvulus. 



white, cream-color, or flesh-color, 1| to 2 inches long. DC. Prodr. ix. 405. Caly- 

 stegia subacaulis, Hook. & Arn. Bot. Beechey, 363. 



Hills and banks, Marin Co. to San Luis Obispo. Blade of the leaf from half an inch to an 

 inch or more in length : peduncles 1 to 3 inches long. 



4. C. villosus, Gray. Densely and softly white-toinentose throughout : stems 

 a span to 2 feet long, trailing or feebly twining : leaves from reniform-hastate to 

 sagittate, the upper acuminate, mostly longer than the petiole ; the basal lobes 

 often augulate-1 - 2-toothed : peduncles mostly shorter than the petiole : bracts oval 

 or ovate, as long as the calyx : corolla cream-color, an inch long. Proc. Am. Acad. 

 1. c. Convolvulus (n. sp. ?), Torr. in Pacif. R. Rep. iv. 127. Calystegia villosa, 

 Kellogg, Proc. Calif. Acad. v. 17. 



Dry hills, from the Upper Salinas River, Monterey Co., and Tejon, to Plumas and Sierra 

 counties. The silky- villous wool very soft and velvety. 



* * No calyx-like bracts, sometimes a pair of leaves close under the flower or a pair 

 of bracts at some distance below it. 



5. C. luteolus, Gray. Glabrous or pubescent : stems at length 2 or 3 feet long 

 and twining : leaves triangular-hastate or sagittate, the basal lobes sometimes 

 2-lobed : peduncles commonly as long as the leaves, bearing a pair of linear or 

 lanceolate entire foliaceous bracts a little below the flower ; a second flower occa- 

 sionally from the axil of one of them : sepals mostly broad and roundish : corolla 

 pale yellow, an inch or more in length. Proc. Am. Acad. 1. c. Ipomoea sagiltifolia, 

 Hook. & Arn. Bot. Beechey, 151 (?), but the stigmas are linear. 



Var. fulcratus, Gray, 1. c. More pubescent : a pair of hastate or sagittate small 

 leaves for bracts either below or close to the flower. C. Californicus, Torr. Pacif. 

 R. Rep. iv. 127, not of Choisy. 



Hillsides from Lake and Colusa to Alameda counties. Variable in foliage, generally glabrous ; 

 the bracts from 1 to 4 lines long and about the same distance below the calyx. Var. fulcratus, 

 which in aspect sometimes much resembles the less downy forms of the preceding species, comes 

 from the foot-hills of the Sierra Nevada (Sonora, Biyclow) to Fort Tejon ( Wallace, Horn), and 

 Cajon Pass (Cooper) : its bracteal leaves commonly half an inch long. 



6. C. longipes, Watson. Glabrous throughout, erect and much branched, the 

 filiform branches sometimes twining : leaves small and sparse, rather short-petioled, 

 or the upper sessile, entire, or most of the lower hastate by a pair of oblong or 

 linear divaricate basal lobes : peduncles 1 -flowered, 2 to 6 inches long, naked, or 

 with one or two distant small leaves remote from the bractless calyx : corolla yel- 

 lowish, over an inch long. Am. Nat. vii. 302. 



Owen's Valley or near Fort Tejon, Dr. Horn. Southern Nevada, Lieut. Wheeler. 



2. CBESSA, Linn. 



Corolla deeply 5-cleft, not plaited ; the oblong or ovate lobes more than half the 

 length of the somewhat campanulate tube, lightly convolute in the bud, or with one 

 lobe external. Stamens and the two distinct entire styles exserted. Stigmas 

 capitate. Capsule 2-valved, by abortion commonly one-seeded. A single species. 



1. C. Cretica, Linn. Perennial herb, a span or two high, erect or diffuse, 

 exceedingly branched, silky-villous and hoary : leaves very numerous, small (2 to 4 

 lines long), almost sessile, mostly ovate-lanceolate or oblong : flowers sessile or 

 short-peduncled in the upper axils : corolla 2 or 3 lines long, white, silky-pubescent 

 outside, a little longer than the calyx. C. Truxillensis, HBK., a name for the 

 American form, which does not much differ from that of Australia (C. australis, R. 

 Brown), but is more silky than that of Europe. 



Saline soil, along the whole length of the coast. Also in alkaline soil in valleys of the Monte 

 Diablo Range, Brewer. Extends to Arizona, &c., and coast of S. America round to S. Brazil. 



