BORAGINE/E. XIII. Merrensia. 
Roem. and Shultes syst. 4. p. 747. 
cauline ones half stem-clasping. 
or conjugate racemes, blue or lilac. 
of the upper leaves downy, pilose. 
Dahurian Mertensia. Fl. May. Clt. 1812. Pl. 1 to 11 feet. 
3 M. putmonarroives (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. 27. H. Native from Penn- 
sylvania 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. hort. hafn. 1. p. 179. Curt. 
bot. mag. 160. Mill. icon. 2. t. 212. "Trew. pl. sel. t. 42. 
^"Lithospérmum pülchrum, Lehm. asper. p. 290.— Plukn. alm. 
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 villous inside at the base. There is also 
a white-flowered variety of this. 
Lungmort-like Mertensia. Fl. March, May. Clt. 
Pl. 1 to 14 foot. 
4 M. mareina‘ra; 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- 
ing, 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. X.H. Native of Louisiana; and on arid hills near 
the confluence of the Teeton river, Missouri. Pulmonària lan- 
ceolàta, Pursh, fl. amer. sept. 2. p. 729. Pulm. marginata, 
Nutt. gen. amer. 1. p. 115. Lithospérmum marginàtum, 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. Virginica, Leaves perfectly glabrous, except on 
the margins. 
Marginate-leaved Mertensia. 
Pl. 1 foot. 
5 M. Druménoir; 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." 2t. H. Native of North-west America.  Lithospér- 
mum Drummóndii, Lehm. pug. 1. p. 26. Stems numerous, from 
the same root, 4 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. Pl. 4 foot. 
6 M. corympdsa; stem erect, pilose; leaves ovate, acute, 
smoothish, pilose beneath and on the margins; flowers race- 
mosely corymbose ; calycine segments lanceolate-linear, elon- 
gated, acute. 2t. H. Native of North-west America. Lithos- 
pérmum corymbdsum, Lehm. pug. 2. p. 27. Stems many from 
the same root, fistular. Calyx hairy. Corolla funnel-shaped, 
blue, 4 an inch long; tube pilose inside ; segments roundish. 
Corymbose-flowered Mertensia. Pl. 3 to 1 foot. 
7 M. Sısírca; 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. Xf. H. Native of Siberia, 
in woods at the river Lena; and of Kamtschatka. Pulmonaria 
Sibírica, Lin. spec. p. 194. Willd. spec. 1. p. 770. Lithos- 
pérmum Sibiricum, Lehm. asper. p. 293. Led. fl. alt. 1. p. 
177. f. ross. alt. ill. t. 207.—Gmel. sib. 4. p. 75. no. 15. t. 39. 
Radical leaves sub-cordate, 
Flowers in terminal, solitary, 
Peduncles from the axils 
1699. 
Fl June, July. Clt. 1818. 
319 
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. 3 to 
14 foot. 
8 M. Parra'su; 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, 2t. H. Native of the Altaian mountains. Pulmo- 
nària bracteata, Willd. herb. ex Schultes, syst. 4. p. 747. Li- 
thospérmum Pallásii, 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 M. 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. 
Pallass Mertensia. FI. June. Pl. 1 to 14 foot. 
9 M. pENTICULA'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. ¥%.H. Native of North America; also 
of Siberia. Pulmonaria Sibírica, Pursh, fl. amer. sept. 2. p. 
729. exclusive of the synonymes. Lithospérmum denticulàtum, 
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. Pl. 3 
to 1 foot. 
10 M. steticisstma ; stem erect, quite simple; leaves ovate- 
oblong, acuminated, rather undulated, glabrous ; calycine seg- 
ments rough, rugose, undulated. 2f. H. Native of Eastern 
Siberia. Pulmonaria simplicissima, Ledeb. obs. bot. in act. 
nov, acad. sc. petro. 5. p. 518. no. 5. Lithospérmum simpli- 
císsimum, 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 Ledgb. 1. c. 
Very simple-stemmed Mertensia. Pl. $ to 13 foot. : 
11 M. virrósurA; stem erect; leaves cordate-ovate, acumi- 
nated, nerved, almost glabrous above, but silky beneath from 
incumbent pili, and villous on the margins ; calyxes villous. X. 
H. Native of the Carpathian mountains, Lithospérmum vil- 
lósulum, 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 villi on the 
margins. Tube of corolla a little longer than the calyx, con- 
stricted under the limb. 
Fl. May, June. Clt. 1800. 
