304 BORAGE FAMILY. 



5. MERTENSIA. (Pro/. F. C. Mertens, of Germany.) ^ 



* Throat of the corolla naked, and the limb entire. 



M. Virgfnica, DC. SMOOTH LUNGWORT. Very smooth and pale, 

 leafy, l-2 high, with obovate, entire leaves, those of the root long- 

 petioled ; handsome flowers spreading or hanging on slender pedicels in 

 loose raceme-like clusters, the light blue or at first purple corolla 1' long ; 

 flowers spring. Alluvial soil, N. Y., W. and S. 



* * Throat crested, and corolla limb 5-lobed. 



M. marltima, Don. SEA LUNGWORT. Spreading or decumbent, 

 glaucous, smooth ; leaves fleshy, ovate to spatulate, the upper surface 

 papillose ; corolla white, twice as long as the calyx. Seacoast, Cape 

 Cod, N. 



6. ONOSMODIUM, FALSE GROMWELL. (Name means like 

 Onosma, a European genus of this family.) Wild plants of the 

 country, mostly in rich soil, in dry or alluvial ground ; flowers leafy- 

 bracted, greenish or yellowish-white, in summer. 2/ 



O. Virginianum, DC. Clothed with harsh but appressed short 

 bristles, l-2 high, with oblong leaves, and lance-awl-shaped lobes of 

 narrow corolla sparingly bristly outside. N. Eng., W. and S. 



O. Carolinianum, DC. Shaggy with rough and spreading bristles ; 

 stout, 3-4 high, with lance-ovate or oblong-acute leaves, and lobes of 

 rather broad corolla triangular and thickly hairy. N. Y., W. and S. 



Var. m<511e, Gray. Hoary, with softer and whitish appressed hairs, 

 the oblong-ovate bluntish leaves strongly ribbed, and lobes of the trian- 

 gular-pointed lobes of the narrow corolla thickly hairy outside. 111., W. 



7. LITHOSPERMUM, GROMWELL, PUCCOON. (Greek: stony 

 seed.) Flowers in late spring and summer, at length scattered or as 

 if spiked, leafy-bracted. 



* Corolla white or yellowish only in the wholly naked throat, scarcely 

 longer than the calyx; nutlets rough-wrinkled and pitted, gray and 

 dull. (I) (D 



L arvense, Linn. CORN GROMWELL. Weed from Eu., in waste dry 

 soil ; 6'-12' high, roughish-hoary, with lanceolate or linear leaves and 

 inconspicuous flowers. 



* * Corolla dull whitish, rather short, with little downy scales or rather 

 folds in the throat; nutlets smooth or with a few pores, often ivory- 

 white. 11 



L. officinale, Linn. COMMON G. Of Eu., a weed by roadsides N.; 

 l-2 high, branched above, with broadish-lanceolate, acute leaves, rough 

 above but soft-downy beneath, and corolla longer than calyx. 



L. Iatif61ium, Michx. From W. N. Y., W. and S. ; larger and 

 rougher than the last, ovate and lance-ovate pointed leaves 2'-4' long 

 and prominently ribbed, those from the root larger and roundish ; corolla 

 shorter than calyx. 



* * * Corolla bright orange-yellow, showy, longer than calyx, almost 

 salver-shaped, with little appendages in the throat evident; nutlets 

 smooth, usually ivory-white. 



L. hfrtum, Lehm. HAIRY PUCCOON. Sterile ground, N. Y., S. and 

 W. ; l-2 high, roughish-bristly, with lanceolate or linear leaves, or 

 those next the flowers ovate-oblong and bristly-ciliate, the crowded 



