328 LABIATE. [LEONURUS. 



13*. LEONU'RUS, L. MOTHER-WORT. 



Erect herbs. Leaves lobed. Whorls axillary, dense-fld., scattered ; 

 bracteoles subulate : flowers small, pink or white. Calyx 5-nerved, tur- 

 binate, truncate, with 5 subspinescent spreading teeth. Corolla-tube naked, 

 or with an oblique ring within ; upper lip entire, erect ; lower 3-fid, mid- 

 lobe obcordate. Stamens 4 ; anthers conniving in pairs, cells transverse. 

 Style-lobes subulate or obtuse. Nutlets smooth, 3-quetrous, truncate. 

 DISTRIB. Europe, Asia, America ; species 10. ETYM. AeW and ovpd, 

 lion's tail. 



L. CARDI'ACA, L. ; pubescent, leaves palmately lobed, bracts subtrifid, 



corolla-tube with a ring of hairs inside. 



Hedges and waste places, England, Scotland, Ireland, Channel Islands, rare, 

 not indigenous ; fl. July-Sept. Rootstock stout. Stem 2-4 ft., stout, erect, 

 angles prominent, very leafy. Leaves very close, radical with slender long 

 petioles, ovate or orbicular-cordate, lobed and toothed ; cauline 2-3 in., 

 petioled, cuneate or obovate-oblong, lower multifid, upper 3-fid palmately 

 3-many-nerved, lobes acute. Whorls very many ; bracts large, leaf- 

 like, petioled ; bracteoles small, subulate, pungent ; flowers sessile. Calyx 

 in. ; teeth broadly triangular. Corolla in., woolly, pale rose, upper lip 

 nearly straight. Nutlets villous-tipped. DISTRIB. Europe, N. and W. 

 Asia, Himalaya ; introd. in N. America. 



14. LA'MIUM, L. DEADNETTLE. 



Annual or perennial hairy herbs. Whorls many-fld., axillary, or in 

 leafy bracteate heads ; bracteoles or subulate ; flowers red purple white 

 or yellow, honeyed, homogamous. Calyx tubular or subcampanulate ; 

 teeth 5, equal, or the upper longer. Corolla-tube naked, or with a ring of 

 hairs within, throat dilated ; upper lip arched ; lower 3-fid spreading, 

 lateral lobes sometimes toothed at the base ; mid-lobe broad, base con- 

 tracted. Stamens 4 ; anthers conniving in pairs, cells diverging. Style- 

 lobes subulate. Nutlets 3-quetrous, truncate, smooth scaly or tubercled. 

 DISTRIB. Temp. Europe, Asia, N. Africa ; species 40. ETYM. XCLL^OS, 

 from the throat-like corolla. 



SECTION 1. Lamiop'sis, Annual (the British sp.). Corolla-tube 

 nearly straight, naked or with a ring of hairs, not constricted below the 

 ring ; throat very wide. Anthers hairy. Nutlets with white scales. 



1. L. purpu'reum, L. ; leaves petioled cordate crenate, whorls] sub- 

 terminal crowded, calyx slightly hairy, teeth spreading in fruit about as 

 long as the tube. 



Fields and waste places, N. to Shetland ; ascends to near 2,000 ft. in North- 

 umbd. ; Ireland ; Channel Islands ; fl. April-Oct. Silkily hairy, or sub- 

 glabrous. Stem 6-18 in., decumbent below, branched from the base, often 

 purplish. Leaves J-2 in., obtuse, petiole as long or longer. Bracts crowded, 

 bases not overlapping, upper subsessile, together forming a flat-topped 

 head. Calyx about in. ; teeth triangular, tips spiuous. Corolla |-f iu., 



