Convolvulus. CONVOLVULACE.'E. 533 



1. CONVOLVULUS, Linn. BiNnwEF.n. 



Corolla carapanulate or sliort and open-funnclform, with more or less 5-angalato 

 or obscurely S-lobed border, deejjly plaited down tlie sinuses in the bud ; the plaits 

 convolute, commonly straight, sometimes contorted (either in the same direction as 

 the plaits overlap or in the opposite). Stamens included. Style liliform : stigmas 

 2, subulate, or in ours flat, and from narrowly linear to oval. Capsule globose, 

 2-celled (sometimes imperfectly so) : cells 2-ovuled and commonly 2-seeded : dehis- 

 cence when perfect septifragal, i. e. the valves separating from the partition. Em- 

 bryo with broad and foliaceous cotyledons, folded and crumpled in the seed. — 

 Stems twining, trailing, or in some erect and bushy. Peduncles solitary in the 

 axils, in ours one-flowered, or occasionally 2-flowered. Ours are all perennial herbs. 



A rather large genus in the Old World, sparingly represented in the New. 



Ipom(ea (Phakbitis) purpurea, and I. Nil, the common species of annual Morning-Glory 

 of cultivation and occasional naturaUzation in the Atlantic States, natives of Mexico, &c., might 

 be expected to occur, either indigenous or adventive, in the southern part of the State ; but we 

 have not met with them. 



Calystegia, R. Brown, in view of the Cahfornian species, is not even a well-marked section. 

 All the following species would belong to it except the last, and the next to the last, which is 

 ambiguous. 



-* A pair of thin viembranaceo-foliaceous bracts close to the calyx, and enveloping it 



or partly so. — (Calystegia, R Brown.) 



+- Herbage rather fleshy : stigmas ovate or oval. 



1. C. Soldanella, Linn. Maritime, low, glabrous : stems a foot or less in 

 length, trailing, rarely attempting to climb : leaves kidney-shaped, entire or ob- 

 scurely angulate-lobed, an inch or two broad, long-petioled : bracts ovate-cordate, 

 not longer" than the sepals : corolla pink or purplish, an inch or more in length : 

 capsule becoming one-celled. — Calystegia Soldanella & C. reniformis, E. Brown. 



Sandy sea-shore, San Diego and northward to Puget Sound. Widely distributed over the 

 Pacific and European coasts. 



Jr- -i- Xot fleshy : stigmas linear, or at most oblong-linear. 



2. C. OCCidentalis, Gray. Glabrous or minutely pubescent : stems twining, 

 several feet high : leaves from broadly ovate-triangular with a deep and narrow 

 basal sinus to narrowly lanceolate-hastate ; the posterior lobes often 1 - 2-toothed : 

 peduncle elongated, not rarely 2-flowered within the bracts ; these ovate or rarely 

 oblong, commonly surpassing and enclosing the calyx : corolla white or pinkish, 

 1 to i\ inches long, and the expanded limb as wide. — Proc. Am. Acad. xi. 89. 



Dry hills, through the western part of the State, from near San Francisco {Dr. Gibbons, with 

 ssitiller ovate-lanceolate and not enveloping bracts, and a second flower from the axil of one of 

 them) to San Diego {Cooper, Cleveland) : var. a7igufitissimus, an extreme form, with 2-flowered 

 peduncles and very narrow linear-lanceolate sagittate leaves, Santa Barbara, Xuttall. The oppo- 

 site extreme, resembling a large and broad-leaved C. sepium, and with iieduncle occasionally 

 3-flowered, is from Guadalupe Island, off Lower California, Dr. Palmer. The stigmas are linear : 

 the style in age inclines to split in two. 



C. SEPIUM, Linn., which occurs northeast of California, and extends round the world, is distin- 

 guished by its ovate or oblong stigmas, and only one-flowered peduncles have been observed. 



3. C. Californicus, Choisy. Minutely and rather densely pubescent, or some- 

 what glabrate, a span or less high and subcaulescent, or producing trailing stems a 

 span to a foot long : leaves mostly obtuse, from ovate or obovate and obscurely has- 

 tate to triangular-hastate and the later ones acute, and the basal lobes sometimes 

 1- 2-toothed, long-petioled: peduncles shorter than the petiole: bracts oblong or 

 oval, not unlike the outer sepals and equalling them, or rather shorter : corolla 



