562 Oedee 90.— BORRAGINACE^. 



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, limb 

 subcampanulate, 5-cleft, throat naked, or oftener with 5 folds or ridge* 

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

 auth. subsagittate ; ach. smooth or reticulated. — 2T. St. and leaves usu- 

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

 sessile. Rac. terminal. 



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

 late, oval, ovato or obovate, cauline sessile, lance-ovato or oblong, all entire, ob- 

 tuse ; cor. tube 3 times longer than the calyx, twice longer than the limb. — T>ry, 

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

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

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

 the same plant. May. (Lithospermum pulchrum Lehm.) 



2 M. maritima Don. Glabrous, procumbent or ascending ; lvs. ovate, obtuse, 

 fleshy, glaucous, the radical pctiolate, cauline 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. panictilata Don. Scabrous with minute hairs, erect; radical lvs. petio- 

 late, ovate, cordate, cauline ovate-oblong, sessile, all acuminate and veined ; cat 

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

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

 varying from bright bluo to white, paniculate, nodding. 



ii. MY0S0TIS, Dill. Forget-me-not. (Gr. pvg, a mouse, and 

 (o£c) gjtoc, an ear ; from the form of the leaves.) Calyx 5-cleft ; cor- 

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

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

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

 Rac. at length elongated, bractless, or with a few, small lvs. at the base. 

 Fls. never axillary. 



§ Racemes one-sided. Calyx clothed with minute, appressed hairs, if any No. 1 



§ Racemes two-sided. Calyx beset with spreading, minutely-hooked bristles Nob. '2, U 



1 M. palustris Roth. j3. laxa (Fig. 220). Minutely strigous or smoothisli, 

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

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

 ing, smoothisli, equal calyx. — % Ditches and marshes, Can. and U. S., very slen- 

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

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

 a yellow center. Fed. 3 to 6" long. May — Aug. (M. eaespitosa Schultz.) 



2 M. arvensis L. Hirsute with tubercular hairs, branching ; lvs. oblong-lanceo- 

 late, acute ; pedicels spreading in fruit, twice as long as the open, equal calyx, in 

 loose racemes, which are not at all leafy among tho flowers at their base.—® 

 Fields, &c. Sts. G to 15' high. Lvs. 1' and less in length. Fls. 2 to 3'' broad, 

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

 native. (M. intermedia, Link.) 



3 M. stricta Link. Roughly hirsuto with spreading, mostly tubercled hairs; 

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

 long as the closed, uncinate-bristly, unequal calyx, in racemes which are leafy at 

 base. — (g) Dry fields and hills, Conn., N. Y., to Wis., 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, flant 6 to 16' high, 

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

 white. May — Jl. (M. verna Nutt. M. arvensis Torr.) 



