BORAGINACEiE 115 



2. L. florib&nda, (Lehm.) Greene. 



Erect, 1-3 ft. high; leaves linear-lanceolate to oblong, rather erect; 

 flowers blue, numerous, crowded in a somewhat dense strict raceme; nutlets 

 keeled, rough on the back, armed along the margins with a single row of 

 flat prickles, sometimes confluent at the base, giving them a saw-tooth 

 appearance. Man.-Alta. 



** Racemes with bracts, fbuitino pedicels not reflexed, calyx- 

 lobes LEAF-LIKE. 



3. L. echin&ta, Gilib. , 



Erect, pubescent, 6 in. to 2 ft. high; nutlets roughened on the back and 

 with two rows of slender prickles on each margin. (L. lappula, L.) Waste 

 cultivated ground, introduced, Man.— Alta. 



4. L. Reddwskii, (Hornem.) Greene; var. occidentalis, (Wats.) Rydb. 

 Erect, 6 in. to 2 ft. high, branched; leaves linear-oblong, small, gradually 



passing into bracts; nutlets with a single row of 7-1 1 flat prickles often united 

 at the base. Waste places, Man. and Sask. , 



2. ONOSMODIUM. 



Calyx 5-cleft, the lobes linear and erect; corolla 5-cleft, tubular, 

 the lobes acute and scarcely, if at all, spreading; stamens inserted 

 on the throat of the corolla; style thread-like and much exserted; 

 nutlets bony. Coarse perennial herbs with sessile rib-veined leaves 

 and whitish or greenish flowers. 



1. O. occident^e, Mackenzie. 



Stout, somewhat rigid, 1-2 ft. high; densely gray pubescent; leaves 

 lanceolate to ovate, sharply rib-veined; nutlets smooth or nearly so. (0. 

 caroliniimum, var. molle, Gray.) Moist ground about thickets, Man.- 

 Alta. 



3. MERTENSIA. Lungwort. 



Calyx 5-oleft; coroUa 5-lobed, the tube much longer than the 

 calyx, open at the throat, but sometimes with a small crest at the 

 base of each lobe; style long and thread-Uke; nutlets wrinkled 

 when dry. Smooth or softly pubescent perennial herbs with entire 

 leaves and small clusters of rather large blue flowers. 



1. M. panicuiata, (Ait.) Don. 



Erect, 1-2 ft. high, more or less hairy; leaves ovate to lanceolate, thin, 

 taper-pointed; corolla funnel-form, much longer than the calyx, with small 

 crests in the throat. N. Man. and westward in sparsely wooded districts. 



