BORAGINE.E. XIII. MERTEXSIA. 



319 



Roem. and Sbuhes syst. 4. p. 747. Radical leaves sub-cordate, 

 cauline ones half stem-clasping. Flowers in terminal, solitary, 

 or conjugate racemes, blue or lilac. Peduncles from the axils 

 of the upper leaves downy, pilose. 



Dahvnan Mertensia. Fl. May. Clt. 1812. PI. 1 to U feet. 



3 M. prLMOXARioiDEs (Roth, catal. 1. p. 34.) stems erect ; 

 leaves nerved, quite glabrous : radical ones obovate-elliptic : 

 cauline ones ovate-lanceolate, bluntish ; racemes subcorymbose, 

 many-flowered ; calyxes glabrous. I/ . H. Native from Penn- 

 svlvania to Carolina, on the gravelly shores of rivers. Pulmo- 

 naria Virginica, Lin. spec. p. 194. Michx. fl. bor. amer. 1. p. 

 131. Pursh, fl. 1. p. 130. Horn, hoit, hafn. 1. p. 179. Curt, 

 bot. mag. 160. Mill. icon. 2. U 212. Trew. pi. sel. t. 42. 

 Lithospermum pulchrum, Lehm. asper. p. 290. Plukn. aim. 

 t. 227. f. 6. Stem glabrous. Leaves glaucous-green, bluntish. 

 Peduncles terminal, and from the axils of the upper leaves. 

 Calyx small, of a greenish purple colour, as well as the peduncles 

 and pedicels : with lanceolate, blunt, spreading segments. Corollas 

 beautiful blue ; tube viltous inside at the base. There is also 

 a white-flowered variety of this. 



Lungifort-like Mertensia. Fl. March, May. Clt. 1699. 

 PI. 1 to 1 1 foot. 



4 M. MARGIXA'TA ; small, glabrous, erect ; leaves hispid on 

 the margins : those on the lower part of the stem oblong-spatu- 

 late. or oblong-ovate : upper ones ovate, acute, half stem-clasp- 

 ins, all glabrous, glaucous, and rather fleshy ; fascicles or racemes 

 pedicellate, a little longer than the leaves, 4-5-8 or more flow- 

 ered ; calyx 5-parted, smooth, acute, having the segments rather 

 hispid on the margins, about half the length of the tube of the 

 corolla. I/. H. Native of Louisiana ; and on arid hills near 

 the confluence of the Teeton river, Missouri. Pulmonaria lan- 

 ceolata, Pursh, fl. amer. sept. 2. p. 729. Pulrn. marginata, 

 Nutt. gen. amer. 1. p. 1 15. Lithospermum marginatum, Spreng. 

 syst. 1 . p. 541. Stem a little branched. Radical leaves petio- 

 late ; lower stem leaves sessile. Flowers subpanicled ; fascicles 

 axillary and terminal. Corolla funnel-shaped, blue, much like 

 those of M. J'irginica. Leaves perfectly glabrous, except on 

 the margins. 



Afarginate-\ea\ed Mertensia. Fl. June, July. Clt. 1813. 

 PI. 1 foot. 



5 M. DRUMMOXDII; stems glabrous, ascending ; radical leaves 

 ovate-lanceolate : cauline ones sessile, oblong-lanceolate, callous, 

 subdenticulated, glaucous ; panicles terminal, crowded ; calyx 

 glabrous, with lanceolate, acutish, somewhat denticulated seg- 

 ments. %. . H. Native of North-west America. Lithosper- 

 mum Drummondii, Lehm. pug. 1. p. 26. Stems numerous, from 

 the same root, a foot high. Peduncles much shorter than the 

 leaves. Corolla 3 times longer than the calyx, almost half an 

 inch long, blue ; segments rounded. 



Drummond's Mertensia. PI. 4- foot. 



G M. CORYMBOSA ; stem erect, pilose ; leaves ovate, acute, 

 smoothish, pilose beneath and on the margins ; flowers race- 

 mosely corymbose ; calycine segments lanceolate-linear, elon- 

 gated, acute, i;. H. Native ot North-west America. Lithos- 

 permum corymbosum, Lehm. pug. 2. p. 27. Stems many from 

 the same root, fistular. Calyx hairy. Corolla funnel-shaped, 

 blue, i an inch long ; tube pilose inside ; segments roundish. 



Corymiose-flowered Mertensia. PI. to 1 foot. 



7 M. SIBIRICA ; plant glaucescent ; stems erect; leaves 

 rather fleshy, glabrous : radical ones cordate, roundish-obtuse, 

 or broad-elliptic: cauline ones ovate, acute; calyxes glabrous ; 

 pedicels longer than the flowers. 1. H. Native of Siberia, 

 in woods at the river Lena ; and of Kamtschatka. Pulmonaria 

 Sibirica, Lin. spec. p. 194. Willd. spec. 1. p. 770. Lithos- 

 permum Sibiricum, Lehm. asper. p. 293. Led. fl. alt. 1. p. 

 177. fl. ross. alt. ill. t. 207. Gmel. sib. 4. p. 75. no. 15. t. 39. 



bad. Root blackish. Stems simple, glabrous. Leaves glaucous 

 green, like the rest of the plant : superior cauline ones ses- 

 sile ; all nerved : uppermost ones almost opposite. Flowers 

 terminal, pedicellate, disposed in elongated, conjugate racemes, 

 with a flower in the fork. Calyx small, with linear, lanceolate, 

 acute, rather unequal segments. Corolla purplish blue : tube 

 3-4 times longer than the calyx, and a little longer than the 

 limb. Style a little exserted. 



Siberian Mertensia. Fl. May, July. Clt. 1801. PL | to 

 1| foot. 



8 M. PALLA'SII ; quite glabrous, pale green ; stem erect, 

 weak ; leaves membranous : radical ones subcordate- ovate, 

 bluntish : superior cauline ones ovate, acute ; pedicels shorter 

 than the flowers ; tube of corolla one and a half longer than the 

 limb, and 3 times longer than the calyx ; style shorter than the 

 corolla, y.. H. Native of the Altaian mountains. Pulmo- 

 naria bracteata, Willd. herb, ex Schultes, syst. 4. p. 747. Li- 

 thospermum Pallasii, Ledeb. fl. alt. 1. p. 176. fl. ross. alt. ill. t. 

 23. Stems simple, striately angular. Racemes usually twin, 

 with a flower in the fork. Corolla funnel-shaped, fine blue, 

 showy. Habit more slender than in .V. Sibirica, Leaves pale 

 green, not glaucous, membranous, not rather fleshy, broader and 

 more numerous. Flowers larger. Calycine segments narrower. 

 Corollas azure blue, not purplish blue ; filaments longer and 

 less dilated at apex ; and the style longer than the corolla, not 

 shorter. 



Pallas i Mertensia. Fl. June. PI. 1 to l foot. 



9 M. DEXTICULA'TA ; stems erect; leaves nerved, almost gla- 

 brous, acute, with denticulately scabrous edges ; radical leaves 

 ovate : cauline ones oblong ; calycine segments oblong, with 

 denticulated margins. I/ . H. Native of North America ; also 

 of Siberia. Pulmonaria Sibirica, Pursb, fl. amer. sept. 2. p. 

 729. exclusive of the synonymes. Lithospermum denticulatum, 

 Lehm. asper. p. 294. Stems many from the same root, gla- 

 brous. Leaves pale green, beset with callous dots above. Pe- 

 tioles stem-clasping at the base ; cauline leaves half stem-clasp- 

 ing. Peduncles terminal, corymbose, many-flowered, elongating 

 after florescence. Calyx short. Corolla blue, like those of M. 

 Sibirica. 



Denticulated Mertensia. Fl. May, June. Clt. 1800. PI. i 

 to 1 foot. 



10 M. siMPLicissiMA ; stem erect, quite simple ; leaves ovate- 

 oblong, acuminated, rather undulated, glabrous ; calycine seg- 

 ments rough, rugose, undulated. "%. H. Native of Eastern 

 Siberia. Pulmonaria simplicissima, Ledeb. obs. bot. in act. 

 nov. acad. sc. petro. 5. p. 518. no. 5. Lithospermum sitnpli- 

 cissimum, Lehm. asper. p. 295. Stem glabrous. Leaves ap- 

 proximating by pairs, or tern. Peduncles terminal, and from 

 the axils of the upper leaves, solitary, at length elongated ; the 

 lower ones sometimes 2-flowered, with one of the flowers ses- 

 sile, and the other pedicellate. Calycine segments lanceolate- 

 linear, acuminated. Corolla blue ? twice as long as the calyx, 

 smaller than any other species of the genus ; tube a little nar- 

 rower than the limb, ex Ledeb. 1. c. 



Very simple-stemmed Mertensia. PI. f to 1-j foot. 



11 M. VILLOSCLA ; stem erect; leaves cordate-ovate, acumi- 

 nated, nerved, almost glabrous above, but silky beneath from 

 incumbent pili, and villous on the margins ; calyxes villous. If. . 

 H. Native of the Carpathian mountains. Lithospermum vil- 

 losulum, Lehm. asper. p. 288. Stems smoothish. Lower leaves 

 on long petioles, 7-nerved ; upper ones sessile, ovate, and more 

 acuminated, 5-nerved. Racemes terminal, bifid. Pedicels nu- 

 tant, and are, as well as the peduncles, villous. Calycine seg- 

 ments lanceolate, acuminated, ciliated with longer vilii on the 

 margins. Tube of corolla a little longer than the calyx, con- 

 stricted under the limb. 



