Mertknsia. XCIV. BORR AGIN ACE Ji. 433 



cence ; jls. scattered, lateral, axillary ; ack. turgid, ovoid, shining, impressed- 

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

 An obscure species, wholly unknown to me. 



4. L, ARVENSE. Corn Gromwell. 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 fusilbrm 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 the upper leaves. May, Jn. 

 * * Flowers yellow. 



5. L. CANESCENs. Lehmaun. (Batschia canescens. Michx.) Puccoon. 

 St. erect, subsimple, softly villose ; lvs. oblong, obtuse, silky-canescent 



above, villous beneath ; jls. axillary ; tube of the corolla thrice as long as the 

 very short calyx. — % A handsome plant, with bright yellow flowers, foimd 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. M^ihl. Batschia Carolinensis. Gmel.) 

 Herbaceous, erect, simple, hairy above; lvs. 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., Fenn., 

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

 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 his^iA ] 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. PENTALOPHUS. Alph. DC. 

 Gr. trcvre, fine, Xocpog, crest; from the character. 



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

 cylindric, much longer than the calyx, throat closed with 5 glabrous 

 valves alternating with the stamens, segments ovate, spreading, much 

 ehorter than the tube ; achenia solitary by abortion, ovoid, white, 

 smooth. — American herbs. 



P. LONGiFLoRus. Alph. DC. (Lithospermum. Sprens. Batschia. Nutt.) 

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

 ated to the ba.se, obtu.«c, v])ptr ones linear, acutish ; rac. leafy, terminal ; cal. 

 seg. linear, much longer than the pedicel ; car. lube 4 times longer than the calyx, 

 a little dilated upwards.— 1|. Prairie du chien to Mo. ! Stem 10—15' high, 

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

 long as the flowers. Corolla yellow, the lube 8 — lO" long, lobes crenulate. 

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



9. MERTENSIA. Roth. 



Calyx short, 5-cleft: cor. tube cylindric, twice longer than the 



calyx, limb subcampanulatc, o-cleft, throat naked, or oftencr with 5 



folds or ridges betwecu the insertion of the stamens ; sta. inserted 



at top of the tube ; anth Bubsagittate : ach. smooth or reticulated — 



