GENUS 8. 



BORAGE FAMILY. 



i. Mertensia virginica (L.) DC. Virginia 



Cowslip. Tree Lungwort. Roanoke- 



bells. Fig. 3524. 



Pitlmonaria virginica L, Sp. PI. 135. 1753. 

 Mertensia virginica DC. Prodr. 10 : 88. 1846. 



Glabrous; stem erect, or ascending, simple or 

 sometimes branched, i-2 high, rather stout. 

 Leaves oblong, oval, or obovate, pinnately 

 veined, obtuse at the apex, 2'-$' long, the upper- 

 most sessile, the lower narrowed into margined 

 petioles; racemes short, corymb-like; pedicels 

 2"-6" long; flowers blue-purple, very showy, 

 about i' long; calyx-lobes oblong-lanceolate, 

 obtusish, i" long or less; corolla trumpet-shaped 

 or nearly salverform, its tube cylindric, a little 

 expanded above, longer than the 5-lobed plaited 

 limb, pubescent at the base within, not crested in 

 the throat ; disk with two opposite linear lobes ; 

 filaments filiform, much longer than the anthers; 

 nutlets not shining, rounded. 



In low meadows and along streams, southern On- 

 tario to New Jersey and South Carolina, Minnesota, 

 Nebraska and Kansas. Blue bells. March-May. 



2. Mertensia paniculata (Ait.) G. Don. 

 Tall Lungwort. Fig. 3525. 



P. paniculata Ait. Hort. Kew. 1 : 181. 1789. 

 M. paniculata G. Don, Gen. Syst. 4: 318. 1838. 



Roughish-pubescent, dark green ; stem erect, 

 branched above, ii-3 high, the branches slen- 

 der. Leaves thin, pinnately veined, those of the 

 stem ovate or ovate-lanceolate, acuminate 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, panicled ; pedicels filiform, 4"-io" long; 

 flowers purple-blue, 6"~7" long; calyx-lobes lan- 

 ceolate, acute ; corolla tubular-campanulate, crested 

 in the throat, the tube about twice as long as the 

 calyx and exceeding the 5-lobed limb; filaments 

 flattened, slightly longer than the anthers ; style 

 filiform, usually somewhat exserted; nutlets 

 rounded. 



In woods or thickets, Hudson Bay to Alaska, south 

 to Michigan, Nebraska, Idaho and Washington. 

 July- Aug. 



3. Mertensia lanceolata (Pursh) DC. 

 Lance-leaved Lungwort. Fig. 3526. 



P. lanceolata Pursh, Fl. Am. Sept. 729. 1814. 

 Mertensia lanceolata DC. Prodr. IO : 88. 1846. 

 M. linear is Greene, Pittonia 3 : 197. 1897. 



Glabrous or somewhat hirsute; stem simple or 

 branched, slender, 6'-i8' high. Leaves papillose, 

 indistinctly veined, light green, the upper lanceo- 

 late, acute, sessile or slightly clasping at the base, 

 the lower oblong or oblanceolate, obtuse, 3''-4' 

 long, narrowed into margined petioles ; racemes 

 few-flowered, usually panicled ; flowers blue, 5"- 

 6" long ; pedicels 3"~7" long ; calyx-lobes lanceo- 

 late, obtuse, or acutish; corolla tubular-campanu- 

 late, the tube 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, Idaho and New Mexico. Races differ 

 in amount or absence of pubescence and in width 

 of leaves. June-Aug. 



