THYMUS.] , LABIATE. 283 



Aug. Glabrous or hairy, hairs often reflexed and in lines on the stems. 

 liootstock woody. Stems decumbent. Leaves ^ ^ in. , shortly petioled, ovate 

 or obovate-lanceolate, obtuse. Wkorls capitate ; bracts foliaceous ; pedicels 

 veiy short ; flowers often 1-sexual. Calyx purplish, teeth ciliate. Corolla 

 ^-$ in., rose-purple. DISTRIB. Europe (Arctic), Siberia, Dahuria, W. Asia 

 to the W. Himalaya, Greenland ; introd. in N. America. 



Sub-sp. SEBPYL'LUM proper; flowering-branches ascending from trailing shoots 

 that are barren at the tip, leaves often obovate, whorls in one head, upper 

 lip of corolla oblong. Commonest form in mountain districts. 



Sub-sp. CHAM^E'DRYS, Fries (sp. ) ; flowering- and barren-branches ascending 

 from the crown of the rootstock, leaves usually ovate, whorls in many axillary 

 heads, upper lip of corolla short and broad. 



5. CALAMIN'THA, McencJi. 



Herbs or shrubs. Whorls dense and axillary or loose and panicled ; 

 flowers purple white or yellow. Calyx tubular, 13-nerved, 2-lipped, upper 

 lip 3-toothed, lower 2-fid ; throat naked or villous. Corolla-tube straight ; 

 throat naked, often inflated ; upper lip erect, flattish ; lower spreading, 

 3-lobed. Stamens 4, ascending under the upper lip, upper sometimes 

 imperfect ; anther-cells parallel or diverging. Style-lobes equal, or the 

 lower larger. Nutlets smooth. DISTRIB. Temp. N. hemisphere ; species 

 about 40. ETYM. KO,\OS and nivQa, beautiful mint. 



SUB-GEN. 1. Calamiu'tha proper. Whorls many, compound, lax, 



lower many-flowered ; bracts minute. Calyx-tube straight. Corolla with 



mid-lobe of lower lip notched. 

 1. C. officinalis, Mwnch ; perennial, leaves ovate, cymes secund. 



Calamint. 



Waste places in dry soil from Westmoreland southwards ; Mid. and S. 

 Ireland; fl. July-Sept. Hairy. Rootstock more or less creeping, stoloni- 

 ferous. Stem, 1-3 ft., erect or decumbent at the base ; branches usually 

 long, straggling and ascending. Leaves crenate-toothed, very variable in size 

 and depth of serratures but pretty uniform in shape, almost glabrous or 

 downy or nearly woolly. Cymes more or less unilateral, peduncles and 

 pedicels variable. DISTRIB. Europe from Belgium southwards, N. Africa, 

 W. Asia ; introd. in N. America. 



Sub-sp. MENTHIFO'LIA, Host (sp.); branches long ascending, leaves 1-1 in. 

 crenate-serrate green below, cymes few-flowered, calyx bent on the pedicel 

 2-lipped, teeth with long bristles, upper triangular, lower subulate much 

 longer, hairs of throat included, corolla ^in., mid-lobe of lower lip longest. 

 Var. liriyi/sii, Syme ; larger, more hispid, peduncles of lower whorls 

 equalling or exceeding the pedicel of the central flower. Devonshire. 



Sub-sp. NEP'ETA, Clairv. (sp.); branches short erect, leaves usually i-1 in. 

 subentire pale beneath, cymes about 10-flowered, calyx erect on the pedicel, 

 teeth nearly equal, upper triangular recurved, lower subulate, hairs of 

 throat prominent, corolla ^in., mid-lobe of lower lip broad truncate. 



Sub-sp. SYLVAT'ICA, Bromf. ; branches or long ascending, leaves 1-3 in. 

 deeply crenate-serrate, cymes loose, calyx bent on the pedicel 2-lipped 

 ciliate, 3 upper teeth abruptly recurved, 2 lower twice as long incurve'd, 

 hairs of throat concealed in the tube, corolla f-1 in., mid-lobe of lower lip 

 about equalling the lateral. Chalk banks, I. of Wight. 



