264 CONVOLVULACE^B. (CONVOLVULUS FAMILY.) 



i- - 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 : stem 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. 

 -- 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-brae ted, 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. 0. molle, Michx. 

 From Utah to Texas, Illinois, and the Saskatchewan. 



ORDER 54. CONVOLVULACEJE. (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 cells sometimes doubled by a false 

 partition. In ours the ovary is entire. 



