386 LABIATAE 



Bracts orbicular or elliptic-ovate, with about 7 to 10 prominent spines 

 on the margin ; corolla white or white in part ; anther-bearing 



stamens commonly 2 ; annuals 11. Acanthomintha. 



Bracts linear to narrow-ovate or oblanceolate, the margin ciliate or 

 pubescent, not spinose; corolla blue or purple. 

 Calyx without a hairy ring in throat ; anther -bearing stamens 4 

 or 2; bracts and calyx markedly ciliate (rarely sub- 

 glabrous) ; eismontane annuals 12. Pogogyne. 



Calyx with a dense hairy ring in throat ; anther-bearing stamens 



2; bracts merely puberulent; desert perennial 



13. Hedeoma. 



Calyx-teeth equal or nearly so (2-lipped in 1 species of no. 15) ; stamens 4 (2 in no. 18). 



Calyx bladdery-inflated in fruit ; flowers in a leafy raceme ; corolla white or pinkish, 



its tube with a hairy ring within; shrubs 14. Sphacele. 



Calyx not bladdery-inflated in fruit. 



Flowers few in loose whorls or solitary in the leaf axils; corolla-tube without 



a hairy ring within; shrubs or perennial herbs 15. Satukeia. 



Flowers several in dense whorls, usually forming an interrupted spike-like in- 

 florescence. 

 Corolla-tube with a hairy ring within ; calj'x-teeth cuspidate or spine-tipped ; 



ours (the native) perennial herbs 16. Stachys. 



CoroUa-tube with no hairy ring within ; calyx-teeth not spine-tipped. 

 Filaments glabrous ; lower lip of corolla not saccate. 



Calyx-teeth short and inconspicuous (^c as long as tube) ; corolla 

 white; leaf -blades mostly ovate, sessile; perennial herbs. 



17. Ptcnanthemum. 

 Calyx-teeth aristate or subulate, as long or nearly as long as the 

 tube, hairy ; lowest leaves petioled ; ours annuals. 

 Corolla yellowish-white, its upper lip notched; anthers gla- 

 brous; leaf -blades lanceolate ; deserts 



18. MONARDA. 



Corolla purplish-red, its upper lip concave ; anthers hairy ; 



leaf blades round-cordate 19. Lamii'm. 



Filaments, at least the upper, hairy; lower lip of corolla with the 



middle lobe saccate or deeply bowl-shaped; shrubs 



20. Htptis. 



2. Corolla regular or nearly so, or the equal or suiequal lobes bilabiately arranged. 



Flowers in terminal heads; stamens 4; dry hills or valleys or rocky mountain slopes 



21. Monasdella. 

 Flowers in axillary whorls ; marshes, river bottoms or wet flats. 



Stamens 2 22. Ltcopus. 



Stamens 4 23. Mentha. 



1. TEUCRIUML. Germander 



Ours herbs with the flowers hi spike-like racemes. Calyx 5-parted. Corolla very 

 irregular, seemingly 1-lipped; upper lip deeply cleft between its lobes, these partly 

 united one on each side to the lateral lobes of the declined lower lip, so that the whole 

 appears as if pinnately 5-cleft with the terminal lobe much the larger. Stamens 4, 

 esserted and ascending from the cleft of the upper corolla-lip but not exceeding 

 the lower lip, the lower pair longer than the upper. Anther-cells confluent, in this 

 manner 1-celled. Nutlets with a large elliptic sear. — Species about 100, all con- 

 tinents. (Teucer, King of Troy.) 



Leaves petioled ; racemes dense, their bracts 3-divided ; corolla little exceeding calj-x.-l. T. cubense. 



Leaves sessUe or subsessUe; racemes very loose, their bracts entire or merely serrate; corolla 2 to 



2yi! times as long as calyx - 2. T. glandulnsum. 



1. T. cubense Jacq. var. densum Jepson. Alkali Germander. Annual, stems 

 many from the base, ascending, % to 1 foot high, glabrous or nearly so ; leaf-blades 

 obovate-cuneate, erenately incised and sometimes .3-parted, % to 11/4 inches long, 

 petioled; racemes dense and regular, 2 to 9 inches long, the flowers about equaling 

 the palmately 3-divided bracts, borne on pedicels i-^o to 1 line long ; calyx-lobes Ian- 



