BORAGINACEAE. 



[Vol. hi. 



I. Mertensia Virginica (L,.) DC. Vir- 

 ginia Cowslip. Tree Lungwort. 

 Blue-bells. (Fig. 3034.) 



Pulmonaria Virginica L. Sp. PI. 135. 1753. 

 Mertensia I'irginica DC. Prodr. 10: 88. 1S46. 



Glabrous; stem erect, or ascending, simple or 

 sometimes branched, i°-2° high, rather stout. 

 Leaves oblong, oval, or obovatc, pinnately 

 veined, obtuse at the apex, 1'-$' long, the up- 

 permost sessile, the lower narrowed into mar- 

 gined petioles; racemes short, corymb-like; ped- 

 icels i"-i>" long; flowers blue-purple, very 

 showy, about I'long; calyx-lobes oblong-lanceo- 

 late, obtusish, \" long or less; corolla trumpet- 

 shaped or nearly salverform, its tube cylindric, 

 a little expanded above, longer than the 5-lobcd 

 plaited limb, pubescent at the base within, not 

 crested in the throat; disk with two opposite lin- 

 ear lobes; filaments filiform, much longer than 

 the anthers; nutlets not shining, rounded. 



In low meadows and alimg streams, soulheni On- 

 tario to New Jersey and Soutli Carolina, Minnesota, Nt-braska and Kansas. March-May. 



2. Mertensia paniculata (Ait.) Don. Tall Lungwort. (Fig. 3035.) 



/». />aK!V»/<7/(2 .\il. Hort. Ktw. i: 181. 1789. . P;'^') .^ . \ -<-<.. 



Mertensia paniculata Don, Gon. Syst. 4: 318. 183S. 



Roughish-pubescent, dark green; stem erect, 

 branched above, i>4°-3° high, the branches 

 slender. Leaves thin, pinnately veined, those 

 of the stem ovate or ovate-lanceolate, acumi- 

 nate at the apex, narrowed at the base, 2'-$' 

 long, the lower narrowed into slender petioles; 

 basal leaves ovate, rounded or cordate at the 

 base; racemes several-flowered, pauicled; pedi- 

 cels filiform, 4"-io" long; flowers purple-blue, 

 6"-7" long; calyx-lobes lanceolate, acute; cor- 

 olla tubular-campauulatc, crested in the throat, 

 the tube about twice as long as the calyx and 

 exceeding thes-lobed limb; filaments flattened, 

 slightly longer than the anthers; style filiform, 

 usually somewhat exserted; nutlets rounded. 



In woods or thickets, Hudson Bay to .\laska, 

 south to Michigan, Nebraska, and in the Rocky 

 Mountains to Colorado and Utah. July--\ug. 



3. Mertensia lanceolata (Pur.sh) DC. 

 Lance-leaved Lungwort. (Fig. 3036.) 



P. lanceolata PursU, Fl. .\m. Sept. 729, 1814. 

 Mertensia lanceolata DC. Prodr. lo; 88. 1S46. 



Glabrous or somewhat hirsute; stem simple or 

 branched, slender, 6'-iS' high. Leaves papil- 

 lose, indistinctly veined, light green, the upper 

 lanceolate, acute, sessile or slightly claspiug at 

 the base, the lower oblong or oblanccolate, 

 obtuse, 3'-4' long, narrowed into margined peti- 

 oles; racemes few-flowered, usually panicled; 

 flowers blue, $"-(>" long; pedicels 3"-7" long; 

 calyx-lobes lanceolate, obtuse, or acutish; cor- 

 olla tubular-campanulate, the tulje longer than 

 the calyx and longer than the 5-lobed limb, hairy 

 at the base within, the throat crested; filaments 

 a little longer than the anthers; style filiform, 

 scarcely exserted. 



In thickets, western Nebraska to Manitoba, 

 Wyoming and New Mexico. June-.-Vug. 



