LEONURUS.] LABIATE. 291 



indigenous ; fl. July-Sept. Rootstock stout, perennial. Stem 2-4 ft., stout, 

 erect, angles prominent, very leafy. Leaves very close set, radical on 

 slender long petioles, ovate or orbicular-cordate, margin lobed and toothed ; 

 cauline 2-3 in., petioled, cuneate or obovate-oblong, lower multifid, upper 

 3-fid, palmately 3-many-nerved, lobes acute. Whmis very many ; bracts 

 large, leaf-like, petioled ; bracteoles small, subulate, pungent ; flowers sessile. 

 Calyx fa in.; teeth broadly triangular. Corolla % in., woolly, pale rose, 

 upper lip nearly straight. Xutlets villous-tipped. DISTRIB. Europe, Siberia, 

 W. Asia to the Himalaya ; introd. in N. America. 



14. LA'MIUM, L. DEAD-NETTLE. 



Annual or perennial hairy herbs, decumbent at the base. Whorls many- 

 ilowered, axillary, or in leafy bracteate heads ; bracteoles or subulate ; 

 flowers red purple white or yellow. Calyx tubular or subcampauulate ; 

 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 at the top, smooth scaly or 

 tubercled. DISTRIB. Temp. Europe, Asia, N. Africa; species 35. ETYM. 

 \aifi6s, 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 ; ascends to near 2,000 ft. in Northumberland ; fl. 

 April -Oct. Silkily hairy, or subglabrous. Stem 6-18 in., decumbent 

 below, branched from the base, often purplish. Leaves -2 in., obtuse, 

 petiole as long or longer. Bracts crowded, bases not overlapping, upper 

 subsessile, together forming a flat-topped head. Cali/x about A in. ; teeth 

 triangular with spinous points. Corolla ^-g in., purple, rarely white; 

 lateral lobes generally 1-2-toothed at the base. DISTKIB. Europe, Canaries, 

 Siberia, W. Asia ; introd. in N. America. 



Sub-sp. PURPU'REUM proper; corolla-tube longer than the calyx-teeth, with a 

 ring of hairs within. VAR. 1, leaves and bracts with shallow crenatures. 

 VAR. 2, deeip'iens, Sender ; leaves and bracts deeply crenate. 



Sub-sp. HYB'RIDUM, Vill. (sp.); corolla-tube shorter than the calyx, ring of 

 hairs within very inconspicuous. L. dissectnm, With. ; L. incimm, Willd. 



2. Ii. interme dium, Fries ; leaves petioled orbicular-cordate crenate, 

 whorls subturminal crowded, calyx slightly hairy, teeth spreading in fruit 

 much longer than the tube. 



Cultivated ground in light soils in Scotland and the extreme N. of England ; N. 

 of Ireland, rare and local ; fl. June-Sept. Intermediate between purpureum 

 (almost united by sub-sp. hyhridum) and L. amplexicaule, of which it has the 

 habit, overlapping upper bracts, and foliage ; often stouter and more suc- 

 culent than either, and the long calyx-teoth distinguish it from both. The 

 tube of the corolla exceeds the calyx and has a very obscure ring of hairs ; 

 lateral lobes toothed. DISTRIB. Chiefly in N. and W. Europe (excl. Spain). 

 U 2 



