532 CONVOLVULACEJ<:. Huqjuyoudla. 



anutropous, tlio orilico iiii'ciior. iS'utlets mostly 2, collutural, oblong, coriaceous, 

 lieiiocLly siiioutii, ol>li(iuoly tixcil by the buso ; oiio of Lliciii imkcd, ubcoiuliiig, and 

 usually it' not always inicrtile ; the other larger und completely invested by the two 

 united lobes of the uuw very oblicjuo calyx, in the form of a bur (somewhat 

 resembling that of a small Franstriu), being sparsely beset with 7 to D long and 

 diverging soft spines, wliich are anned with short hook-tipped bristles, liadicle 

 iiderior or centripetal. — A little herb with the aspect of Pectocart/a. — Proc. Am. 

 Acad. xi. 88, 



1. H. Falmeri, Oray, 1. c. Diifuso and slender annual, a span high, minutely 

 strigose-hirsute : lt;aves linear-lanceolate : Uowers very small, lateral at all the nodes, 

 on short at length dellexed peduncles : corolla white, miimte : spines of the fruiting 

 calyx as long as the bur-like body ; the 3 free calyx-lobes small and rather remote. 



(Juadalujic l.slaml, Lower California, Dr. E. Palmer. Althougli iVom a station two hundred 

 miles below the lino of the State, this curious little plant is not unlikely to occur along the 

 borders, iu company with J'cctocari/a, with which it is associated on Guadalupe Island. 



OuDKK LXVl. CONVOLVULACEiE. 



Herbs, or some shrubs in warm climates, more commonly twining or trailing, 

 many with milky juice ; all with alternate leaves (or scales) and regular perfect 

 flowers ; the stamens as many as the lobes or angles of the corolla and alternate 

 with them (5, rarely 4) ; the free persistent calyx of mostly distinct much-imbri- 

 cated sepals ; ovary 2 - 3-celled, with a pair of erect or ascending ovules iu eacli 

 cell, the cells occasionally divided, so as to form 4 one-ovided half-cells; capsule 

 generally globular ; seeds 1 to 4, ijroportionally large, with a large embryo and 

 a little mucilaginous albumen. Inllorescence axillary : peduncles 1-flowered or 

 cymosely several-flowered. Flowers oftener large and showy, and opening only 

 once. 



An order of nearly 30 giMiera and numerous species, widely spread over tlie world, but most 

 abundant in warm t'oiintrics, nioderalcly wM roprcsonled in the Atlantic United SUiles, at least 

 in the Southern, but tlu'ie are wonilcrfuUy few on the Pacific side. Lower ralifornia has several, 

 all of the tropical types and (|uite beyond our reach. The order yields purijative medicines, such 

 as .lulapnnd Scaniniony, and ono important article of food, Sweet-Potato, the root oi JpomuM Iki- 

 la/tis ; also some ornamental llowers. 



Evoi.vuLUs, Linn., a genus of low and slender plants, not twining, small-Howereil, and remark- 

 able for having two styles each 2-cleft, is represented by two or three species leaching as near 

 as Lower California and Arizona. 



DiciioNDKA, Forster, a genus of two small creeping Iierbs, — one of them most widely diffused 

 throughout the warm-temperate and tropical regions of the world, the other Mexican extemling 

 into Arizona, &c., — appears to be wholly absent from California. The genus is known by the 

 anomaly of two distinct ovaries as well as styles. 



Tkibk L CONVOLULE.'E. Plants with ordinary green herbage. Embryo with broad and 

 thin foliaceous cotyledons, folded and crum[ilcd in the seed. 



\. Convolvulus. Corolla plaited and usually convolute in the bud; the limb mostly entire or 

 5-angled. Style single: stigmas 2, linear, or oblong. (Ii-oakka will bo known by its 

 caj)itate or 2-3-capilate stigma.) 



2. Cressa. Corolla not plaited, 5-cleft. Styles 2, distinct, each witli a capitate stigma. 



TiiiiiK II. CUSCUTINE/E. Twining parasites, whitish or yellowish, wholly destitute of green 

 foliage. Embryo liliform ami s[iiral, destitute of cotyledons. 



3. Cuscuta. The only genus. Corolla not plaited, 4-5-lobed. Styles in ours 2, and stigmas 



cii|>itato. 



