86 CONV0LVULACEJ3. (mORNING GLORY FAMILY.) 



angular nutlets armed with prickles on the margins; limb of the rotate corolla 2 to 5 

 lines in diameter, blue, rarely white. 



5. CYNOGLOSSUM, Toum. 



Chiefly distinguished from the preceding by the broad large leaves, the bractless 

 racemes and the nutlets clothed over the whole back with stout barbed prickles. 



1. C. grande, Dougl. About 2 ft. high, jiubescence soft; radical and lower stem 

 leaves ovate oblong, usually rounded or cordate at the base, long petioled; panicled 

 racemes or cymes small, on a long naked terminal peduncle; corolla tube exceeding the 

 calyx; its limb blue to violet, with usually purple crests; 3 to o lines wide. 



6. PECTOCARYA, DC. 



Structure of the minute white flowers similar to the preceding; nutlets widely spread- 

 ing in pairs, horizontal, oblong or almost linear, surrounded by an incurved wing-like 

 border which is toothed, the apex beset with hooked bristles. 



1. P. peniclUata, A. DC. Very slender, diffusely branching, spreading, with nar- 

 row linear leaves, and small flowers scattered the whole length of the stem, on very short 

 pedicels; nutlets only a line long. 



Order 41. CONVOLVULACEiE. 



Herbs, usually twining or trailing, 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 imbricated sepals; ovary 

 2-3-celled; capsules generally globular; seeds 1 to 4. Inflorescence axillary. 



Corolla plaited in the bud; style single Convolvulus. 1 



Corolla 5-cleft; styles 2 Cressa. 2 



Twining parasites, leafless, yellowish Cuscuta. 3 



1. CONVOLVULUS, L. 



Corolla campanulate or short and open funnel-form, with a 5-angulate or obscurely 

 5-lobed border, deeply plaited down the sinuses in the bud. Stamens included. Style 

 filiform; stigmas 2, in ours flat, from linear to oval. 



* A pair of bracts close to the calyx, enveloping if. 

 1. C. Soldanella, L. Maritime, low, smooth; stems a foot or less in length, trail- 

 ing; leaves reniform entire or obscurely angulate-lobed, an inch or two broad, long 

 petioled; corolla pink, purplish, or nearly white. 



