264 CONVOLVULACE^E. (CONVOLVULUS FAMILY.) 



*- -t- Corolla bright and deep yellow or orange ; the tube from \ to twice longer 

 than the calyx, and the crests at the throat little if at all projecting or arch- 

 ing: floral leaves orfoliaceous bracts large, much surpassing the calyx. 



3. L. canescens, Lehm. More or less canescent when young : slem hir- 

 sute, a span to a foot or more high : leaves oblong-linear or the upper varying 

 to ovate-oblong, mostly obtuse, softly silky-pubescent, greener with age but not 

 rough; corolla orange-yellow, and glandular ring at the base naked: flowers 

 nearly sessile. — From Arizona and New Mexico to the Saskatchewan, Upper 

 Canada, and Alabama. " Puccoon " of the Indians. 



4. L. hirtum, Lehm. Hispid or hirsute and at length rough, a foot or two 

 high : leaves lanceolate or the lower linear and floral ovate-oblong : corolla 

 bright orange; the ring at the base within bearing 10 very hirsute lobes or teeth: 

 flowers mostly pedicelled. — From Colorado to Minnesota and Florida. 



■i- +- +- Corolla bright yellow, salverform ; its tube in well-developed flowers 2 to 

 4 times the length of the calyx ; the crests in the throat conspicuous and arching. 



5. L. angustifolium, Michx. Erect or diffusely branched from the 

 base, a span to a foot or more high, minutely scabrous-strigose and somewhat 

 cinereous : leaves all linear : flowers pedicelled, leafy-bracted, of two sorts ; 

 the earlier and conspicuous kind with corolla tube an inch or less in length ; 

 the later ones, and those of diffusely branching plants, with inconspicuous or 

 small and pale corolla, without crests in the throat, probably cleistogenous. — 

 From Utah and Arizona to Texas, Wisconsin, and the Saskatchewan. 



9. ONOSMODIUM, Michx. 



Rather stout and coarse, rough-hispid or hirsute, with leafy-bracteate flowers 

 crowded in scorpioid spikes or racemes ; the bracts resembling leaves : corolla 

 greenish-white or yellowish-green; a glandular 10-lobed ring adnate to the 

 base of the tube within. In ours the corolla is seldom twice the length of the 

 calyx, and the leaves are pinnately nervose-ribbed. 



1. O. Carolinianum, DC. Stout, 2 or 3 feet high, shaggy-hispid.- 

 leaves ovate-lanceolate and oblong-lanceolate, acute, 5 to 9-ribbed, generally 

 hairy both sides : flowers nearly sessile : corolla lobes very hairy outside. — 

 Colorado and eastward. 



Var. molle, Gray. A foot or two high : the pubescence shorter and less 

 spreading or appressed : leaves mostly smaller (2 inches long), when young 

 softly strigose-canescent beneath. — Synopt. Fl. ii. 206. O. molle, Michx. 

 From Utah to Texas, Illinois, and the Saskatchewan. 



Order 54. COWVOLVITL,ACEJE. (Convolvulus Family.) 



Chiefly twining or trailing herbs, with alternate leaves (or scales) and 

 regular 5-androus flowers; a calyx of 5 imbricated sepals; a 5- plaited 

 or 5-lobed corolla convolute or twisted in the bud ; a 2-celled ovary, 

 with a pair of ovules in each cell, the oells sometimes doubled by a false 

 partition. In ours the ovary is entire. 



