6o 



BORAGINACEAE. 



[Vol. III. 



i. Mertensia Virginica (L.) DC. Vir- 

 ginia Cowslip. Tree Lungwort. 

 Blue-bells. (Fig. 3034.) 



Pulmonaria 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 / ~5 / long, the up- 

 permost sessile, the lower narrowed into mar- 

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

 icels 2 // -6 // long; flowers blue-purple, very 

 showy, about i / long; calyx-lobes oblong-lanceo- 

 late, obtusish, 1" 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 lin- 

 ear 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. March-May. 



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



P. paniculata Ait. Hort. Kew. 1: 181. 1789. Cf^l ^ k fj> } /) 



Mertensia paniculata Don, Gen. Syst. 4: 318. 1838. 

 Roughish-pubescent, dark green; stem erect, 

 branched above, iK-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 r -5 r 

 long, the lower narrowed into slender petioles; 

 basal leaves ovate, rounded or cordate at the 

 base; racemes several-flowered, panicled; pedi- 

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

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

 olla 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, and in the Rocky 

 Mountains to Colorado and Utah. July-Aug. 



3. Mertensia lanceolata (Pursh) DC. 



Lance-leaved Lungwort. (Fig. 3036.) 



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

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



Glabrous or somewhat hirsute; stem simple or 

 branched, slender, 6 / -i8 / high. Leaves papil- 

 lose, indistinctly veined, light green, the upper 

 lanceolate, acute, sessile or slightly clasping at 

 the base, the lower oblong or oblanceolate, 

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

 oles; racemes few -flowered, usually panicled; 

 flowers blue, $"-&' long; pedicels $"-7" long; 

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

 olla tubular-campanulate, 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 and New Mexico. June-Aug. 



