Mertensia. XCIV. BORRAGINACEiE. 433 



cence ; fls. scattered, lateral, axillary ; ach. turgid, ovoid, shining, impressed- 

 punctate. — Banks of streams, sandy prairies, Ohio river, Michaux, 111. Mead. ? 

 An obscure species, wholly unknown to me. 



4. L. ARVENSE. Corn GromwcU. WheaUtkkf. 



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 tarmers. The 

 stem is branching, erect, 12 — 15' high, from a fusitorm 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 sul)acute. Flowers 

 small, white, subsessile, solitary, in the axils of the upper leaves. May, Jn. 

 * * Mowers yellow. 



5. L. CANESCENs. Lehmaun. ("Batschia canescens. Mickx.) Puccoon. 

 St. erect, subsimple, soilly villose ; lis. oblong, obtu.se, silky-canescent 



above, villous beneath ; Jls. axillary ; tube of the cm-olla thrice as long as the 

 veiy short calyx. — ^i\. A handsome plant, with bright yellow flowers, found in 

 prairies, fields and dry hills. Can., N. Y. ! to 111. ! and Southern States. Stem 

 8 — 12' high, erect, simple, rarely a little branched above, hoary-villose. Leaves 

 sessile, 2—3" wide and 4 times as long, 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. HiRTUM. Lehm. (Anchusa. Muhl. Batschia Carolinensis. Gmcl.) 

 Herbaceous, erect, simple, hairy above ; lis. 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. — % Can., Penn^^ 

 to La. Stems 8 — 12' high, clustered. Flowers crowded, racemed. CorollJi^ 

 orange-yellow, large. 



7. L. Apulum. Vahl. (Myosotis. Linn. M. lutea. Lam.) 



St. herbaceous, erect, rough with hairs; lvs. linear-lanceolate, acute, 

 erect, rough and hairy; spikes \iispid ; bracts foliaceous; cor. longer than the 

 calyx ; ach. muricate. — (i) 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. P.ENTALCPHUS. Alph. DC. 



Gr. rr£i/"£, fine, Xo^of, crest; from the character. 



Calyx 5-parted, with linear segments ; cor. hypocrateriform, tube 

 eylindric, inucli 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 Jierbs. 



P. LONGiFLORUs. Alph. DC. (Lithospcrmum. Spreng. Batschia. Nutt.) 

 Erect, strigose with a cinerous pubescence ; lower lvs. lance-linear, attenu- 

 ated to the base, obtuse, upper ones linear, acutish ; rac. leafy, terminal ; cal. 

 seg. linear, mtich longer than the pedicel ; cor. tube 4 times longer than the calyx, 

 a little dilated upwards.— Tj. Prairie du chien to Mo. ! Stem 10—15' high, 

 slender, branched near the top. Leaves 1 -1^' by 2—3", the floral ones about as 

 long as "the flowers. Corolla yellow, the tube 8 — 10" long, lobes crenulate. 

 Style scarcely exserted. Fruit much shorter than the calyx, smooth, white. Jl. 



9. MERTENSIA. Roth. 



Calyx short, 5-cleft; cor. tube eylindric, 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. — 



