264 CONVOLVULACE.E. 



corolla funnelform, % in. long, whitish: the throat with puberulent lines: 

 nutlets brownish, dull, coarsely wrinkled and pitted. Occasional at 

 San Francisco; native of Europe. 



8. HELIOTROPIUM, Theophr. Genus differing from all others of 

 this order, in our flora, by a corolla with plaited lobes, anthers connivent, 

 and nutlets that are not seed-like in appearance, but resemble 4 sep 

 arated closed cells of a capsular fruit. 



1. H. Curassayicum, L. A very fleshy glabrous and glaucous 

 depressed perennial: leaves ob9vate to much narrower, almost linear: 

 spikes mostly in pairs, dense-flowered: corolla white, with yellow eye. 

 Common in low subsaline soils, chiefly in the interior. 



OEDER LXXIII. CONVOLVULACExE, 



Herbs or shrubs, with milky juice, the stems usually twining or 

 trailing. Leaves alternate, petiolate, exstipulate. Peduncles axillary, 

 1-flowered, or cytnosely several-flowered. Flowers regular, perfect, 5- 

 merous. Sepals mostly distinct, persistent. Corolla mostly plaited and 

 the plaits convolute. Stamens as many as the corolla-lobes and alternate 

 with them. Ovary entire or lobed; usually maturing as a capsule with 

 few and large seeds. 



Stems twining or trailing; corolla plaited CONVOLVULUS 1 



" creeping; corolla not plaited DICHONDRA 2 



" erect or diffuse; corolla not plaited CBESSA 3 



1. CONVOLVULUS, Pliny (BINDWEED. MORNING GLORY). Corolla 

 funnelform, plaited and the plaits dextrorsely convolute. Stamens not 

 exserted. Style 1, cleft at apex; stigmas 2, linear to oblong or ovate. 

 Capsule globose, thin-walled, 2-celled or imperfectly 4-celled, mostly 

 2 4-valved, with few and large seeds. 



* Species naturalized from Europe. 



1. C. PENTAPETALOIDES, L. Annual, slender, branching from the 

 base, 615 in. high, pubescent: leaves spatulate-oblanceolate : peduncles 

 1-flowered, bibracteate toward the summit: corolla small, purplish, deeply 

 5-lobed the lobes ovate. Common in fields along the eastern base of the 

 Mt. Diablo Eange. March, April. 



2. C. ARVENSIS, L. Perennial, prostrate, the stems 1 3 ft. long: 

 leaves oblong-sagittate or hastate, 12 in. long, the basal lobes short: 

 pedicels 1 3-flowered, with a pair of subulate bracts near the base: 

 corolla white, with a tinge of purple on the outside, neither lobed nor 

 angled. Very prevalent as a weed in fields and by waysides. May Nov. 



* * Native species; calyx embraced by a pair offoliaceous bracts. 



3. C. Soldanella, L. Low, glabrous, slightly succulent; stems 10 15 

 in. long, prostrate: leaves reniform, deep green and shining, 1 2 in. long, 



