MERTENSIA. XCIV. BORRAGINACES. 433 
cence ; fis. scattered, lateral, axillary; ach. turgid, ovoid, shining, impressed-. 
punctate —Banks of streams, sandy prairies, Ohio river, Michaux, Ill. Mead. ? 
An obscure species, wholly unknown to me. 
4. L. ARVENSE. Corn Gromweil. Wheat-thief. ’ 
Lvs. linear-lanceolate, obtuse, hairy; cal. nearly equal to the corolla, 
with spreading segments; ach. rugose.—@) A rough, pilose weed, introduced 
into our fields and waste grounds, much to the annoyance of the farmers. The 
stem is branching, erect, 12—15’ high, from a fusiform root with reddish bark. 
Leaves bright green, rough, sessile, 1—2’ in length, with only the central vein; 
the lower ones obtuse and narrowed to the base; upper ones subacute. Flowers 
small, white, subsessile, solitary, in the axils of tthe upper leaves. May, Jn. 
* * Flowers yellow. . 
5. L. canescens. Lehmann. (Batschia canescens. Michz.) Puccoon. 
S¢. erect, subsimple, softly villose; dvs. oblong, obtuse, silky-canescent 
above, villous beneath; fs. axillary ; tube of the corolla thrice as long as the 
very short calyx.—2, A handsome plant, with bright yellow flowers, found in 
rairies, fields and dry hills, Can., N. Y.! to Ill.! and Southern States. Stem 
ae high, erect, simple, rarely a little branched above, hoary-villose. Leaves 
sessile, 2—3/’ wide and 4 times as ljong, 1-veined. Flowers crowded near the 
summit of the stem. Calyx segments lanceolate, acute. Corolla bright 
orange-yellow, including the subsessile stamens and short style. Jn., Jl. The 
root is used to dye red by the Indians. 
6. L. uirtum. Lehm. (Anchusa. Muhl. Batschia Carolinensis. @mel.) 
Herbaceous, erect, simple, hairy above; /vs. sessile, linear-lanceolate, 
obtuse, ciliate-hirsute both sides, floral ovate-lanceolate; cal. lobes linear, hir- 
sute, a little shorter than the tube of the corolla; cor. segments spreading, 
obovate, entire, tube hispid inside at base; ach. ovoid, shining —2 Can., Penn., 
to La. Stems 8—12’ high, clustered. Flowers crowded, racemed. Corolla. 
orange-yellow, large. 
7. L. Apttum. Vahl. (Myosotis. Linn. M. lutea. Lam.) 
St. herbaceous, erect, rough with hairs; Jvs. linear-lanceolate, acute, . 
erect, rough and hairy; spikes hispid; bracts foliaceous; cor. longer than the 
calyx; ach. muricate——@) Dry woods, Ohio. Pursh. Stem 2—6’ high, gene- 
rally simple at base, branched above. Corollas small, yellow, in the axils of 
lanceolate bracts. 
8 PENTALOPHUS. Alph. DC. 
Gr. mevTe, fine, Nogos, crest; from the character. 
Calyx 5-parted, with linear segments ; cor. hypocrateriform, tube 
eylindric, much longer than the calyx, throat closed with 5 glabrous 
valves alternating with the stamens, segments ovate, spreading, much 
shorter than the tube; achenia solitary by abortion, ovoid, white, 
smooth.— American herbs. 
P. toncirLorus. Alph. DC. (Lithospermum. Spreng. Batschia. Nutt.) 
Erect, strigose with a cinerous pubescence ; lower lvs. lance-linear, attenu- 
ated to the base, obtuse, wpper ones linear, acutish; rac. leafy, terminal; cal. 
seg. linear, much longer than the pedicel ; cor. tube 4 times longer than the calyx, 
a little dilated upwards.—2 Prairie du chien to Mo.! Stem 10—15/ high, 
slender, branched near the top. Leaves 1 —13’ by 2—3”, the floral ones about as 
long as the flowers. Corolla yellow, the tube 8—10” long, lobes erenulate. 
Style scarcely exserted. Fruit much shorter than the calyx, smooth, white. Jl. 
9. MERTENSIA. Roth. 
Calyx short, 5-cleft; cor. tube cylindric, twice longer than the 
calyx, limb subcampanulate, 5-cleft, throat naked, or oftener with 5 
folds or ridges between*the insertion of the stamens; sta. inserted 
at top of the tube; anth. subsagittate ; ach. smooth or reticulated — 
