358 DIDYXAMIA GYMNOSPEHMIA 



2. L. pntPCRHUM, L. Loaves cordate, crenatc-serrate, all petiolate, 

 upper ones crowded; tube of the corolla with a hairy ring at base with- 

 in, the lateral lobes produced into a tooth-like process. Benth. Lab. 

 p. 512. 

 Purple Lamium. 



Root annual. Stem 4 to 6 or 8 inches high, branched at base; branches ascend- 

 ins, retrorsely scabrous, dark green or purplish. Leaves half an inch to an inch 

 long, rugose, hairy; loicer ones orbicular- cordate, on petioles an inch to an inch 

 and half long ; upper ones oblong-cordate, crowded at the summit of the stem, on 

 shorter petioles, silky-hirsute, especially on the upper surface. Verticils many, 

 flowered, crowded at the summit of the stem, forming a sort of leafy head, Some- 

 times the lowest one a little distant. Calyx somewhat hairy ; teeth subulate, cil- 

 iate. Corolla violet-purple, pubescent ; galeate upper lip entire, villoso ; lateral 

 lobes toothed ; lower lip bifidly emarginate, spotted. Anthers hairy. 

 Hab. Gardens, and cultivated Lots: not common. Fl. April— May. Fr. June. 



Obs. I am indebted for this to Mr. Pennock Passmore,— who found it natur- 

 alized on his farm, in East Goshen. There are probably no native species in the 

 U. States. 



288. LEONURUS. L. Xutt. Gen. 504. 

 [Greek, Leon> a lion, and Oura, a tail ; from a fancied resemblance of the plant.] 



Calyx turbinate, 5 or 10-nerved, nearly equally 5-toothed ; teeth subu- 

 late, subspinescent, finally spreading. Corolla bilabiate ; upper lip ob- 

 long, entire, flattish, or somewhat vaulted; lower lip spreading, 3-lobed, 

 lateral lobes oblong, middle one obcordate. Stamens ascending, lower 

 ones longer ; anthers approximated in pairs, incumbent, 2-celled ; cells 

 mostly parallel. Akenes triquetrous, trunca e at apex. 



1. L. Cardiac a, /,. Stem-leaves palmatc-lobed, floral ones cuneatc- 

 oblong, mostly trifid, lobes lanceolate ; corolla longer than the calyx- 

 teeth; tube with a villose ring within at base ; upper lip flattish, hirsutc- 

 ly villose. Beck, Bot. p. 278. 



Cardiac Lkoxurus. Vulgo — Mother-wort. 



Gall. — L'Agripaume. Germ. — Das Herzgespann. Hisp. — Agripalma. 



Root perennial. Stem 2 to 4 feet high, branched at base, and above, retrorsely 

 pubescent, with a hairy ring at the joints, often purple at base. Leaves 2 to 4 

 inches long, and 1 to 3 or 4 inches wide, rugose, pubescent ; the loicer ones nearly 

 orbicular in the outline, palmate-lobed, pubescent, lobes lanceolate, acute, coarsely 

 and unequally serrate, petioles 1 to 2 inches long; upper or Jloral leaves obovate- 

 oblong, or cuneatc, acutely 3-lobed at apex, middle lobe longest, margin mostly 

 entiie, petioles half an inch to an inch long. Verticils G to 1*2 or 15-fl owered, ses- 

 sile, distant, forming an interrupted leafy spike 6 to 12 or 15 inches 1 >ng ; brarts 

 subulate. Calyx obovoid or turbinate, strongly 5-ribbcd, smoothish, becoming 

 rigid ; teeth lanceolate, sharply acuminate, pungent, spreading, the lower ones 

 rather linger. Corolla pale purple, externally wry hairy, especially on the up- 

 per lip. Akenes hirsute at apex, reddish brown. 



Hab. Yards, fence-rows, and waste places : common. FJ. June — July. Fr. Aug. 

 Obi. This is rather a troublesome foreign weed,— now completely naturalized. 



