562 OBDER 90. BORRAGINACE^E. 



10. MERTENSIA, Roth. (Pulmonaria, Tourn.) SMOOTH LUNG- 

 WORT. (Named for Prof, F. C. Mertens, of Bremen, Germany.) Calyx 

 short, 5-cleft; cor. tube cylindric, twice longer than the calyx, limh 

 subcainpanulate, 5-cleft, throat naked, or oftencr with 5 folds or ridges 

 between the insertion of the stamens ; sta. inserted at top of the tube ; 

 anth. subsagittate ; ach. smooth or reticulated. 2 St. and leaves usu- 

 ally glabrous and pellucid-punctate, the radical many-veined, caulino 

 sessile. Rac. terminal. 



1 M. Virginica DC. Erect or ascending, very smooth ; radical Ivs. large, petio- 

 late, oval, ovate or obovate, eauline sessile, lance-ovate or oblong, all entire, ob- 

 tuse; cor. tube 3 times longer than the calyx, twice longer than the limb. Dry, 

 rich soils, N. Y. to S. Car. and Iowa. A plant of rare beauty, 12 to 18' high. 

 Lvs. 2 to 6' long, the caulino feather-veined. Fls. numerous, nodding, somewhat 

 trumpet-shaped, 10" long, varying through every shade of blue and lilac even on 

 the same plant. May. (I.ithosptrmum pulchrutn Lehm.) 



2 M. maritima Don. Glabrous, procumbent or ascending; Ivs. ovate, obtuao, 

 fleshy, glaucous, the radical petiolate, caulino sessile ; rac. leafy ; cal. deeply cleft, 

 scarcely half as long as the glabrous, 5-cleft corolla. Sea shore, N. Eng., rare, 

 Can. and northward. St. diffusely branched. Fls. purplish blue, limb longer 

 than the tube, which exhibits 5 folds at its summit. Jl. 



3 M. paniculata Don. Scabrous with minute hairs, erect; radical Ivs. petio- 

 late, ovate, cordate, eauline ovate-oblong, sessile, all acuminate and veined; cal. 

 hispid, thrice shorter than the subcampanulate corolla. Shores of the great 

 Lakes, from Superior to Bear L., also in gardens. An elegaut plant, with fls. 

 varying from bright blue lo white, paniculate, nodding. 



H. MYOSOTIS, Dill. FORGET-ME-NOT. (Gr. jui)c, a mouse, and 

 (ovf) wrof, an ear; from the form of the leaves.) Calyx 5-clei't; cor- 

 olla salver-form or funnel-form r tube about equaling the calyx, the 5 

 lobes convolute in bud, orifice closed with short, concave scales ; achc- 

 nia ovate, smooth, with a small cavity at base. Herbs, slightly villous. 

 Rac. at length elongated, bractlcss, or with a few, small Ivs. at the base. 

 tCls. never axillary. 



Racemes one-sided. Calyx clothed with minute, npprcsscfl hairs, if nny 



Itacenies two-sided. Calyx beset with spreading, imnutely-huokcd bristles 



1 M. palustris Roth. p. LAXA (Fig. 220). Minutely strigous or smoothish, 

 somewhat branched, erect; Ivs. linear-oblong, obtuse, with short, scattered hairs; 

 rac. without bracts; pedicels divaricate in fruit, twice as long as the short, spread- 



' v ing, smoothish, equ; 1 .! calyx. TJ- Ditches and marshes, Can. and U. S., very slen- 

 der, about a foot high. Lvs. scattered, sessile, about 1' by 2 or 3". Kac. termi- 

 nal, or often one of them supra-axillary, one-sided. Fls. 2 to 3'' broad, biuc, with 

 a yellow center. Ped. 3 to G" long. May Aug. (M. crcspitosa, ^eliultz.) 



2 M. arvensis L. Hirsute with tubercular hairs, branching: Ivs. oblong-lanceo- 

 late, acute; pedicels spreading in. fruit, twice as long as the open, cq'tul calyx, iu 

 loose racemes, which are not at all leafy among the flowers at tlivirlase. 

 Fields, &c. Sts. to 15' high. Lvs, 1' and ICFS in length. Fls. 2 to :)'' broad, 

 white? Jl., Aug. Wo de?cribo from English specimens, having seen nono 

 native. (M. intermedia, Link.) 



3 M. stricta Link. Roughly hirsute with spreading, mostly tubercle:! hairs; 

 Ivs. oblong, or the lower spatulate-oblong, obtuse or acute, pedicels ascending, as 

 long as the closed, uncinate-bristly, unequal ca'yr, in vactmes which are leafy at 

 base.& Dry fields and hills, Conn., N. Y., to AYis., La. and Ala. Plant varying 

 greatly in aspect at different stages of growth, yet always recognized by its calyx, 

 which is decidedly bilabiate, the lower lip of 2 "longer teeth. Plant G to 1G' high, 

 grayish. Lvs. 1' long, or in larger specimens 2'. FJs. very small (1" broad), 

 white. May JL (M. verna Nutt. M. arvcnsis Torr.) 



