Ajuga. LABIATE. 349 



3. ISANTHUS, Michx. (From 1004, equal, and uvdoe, flower : calyx and 

 corolla nearly regular.) Single species. 



I. caeruleus, Michx. Low and erect annual, somewhat viscid-pubescent, pungently 

 aromatic, copiously branched : leaves oblong-lanceolate or broader, acute at both ends, 

 somewhat petioled: peduncles axillary, 1-3-flowercd : corolla blue, 2 or 3 lines long, 

 little exceeding the calyx. Fl. ii. 3, t. 30. Trk-hoatcma brarliiatnm,!,. I.e. (Dill. Elth. 

 t. 285.) Dry or sterile ground, common from Canada to Georgia, Kentucky, and Texas : 

 fl. all summer. 



4. TEUCRIUM, L. GERMANDER. (Teucer, first king of Troy.) --Less 

 aromatic herbs or undershrubs, mainly of the Old World : fl. summer. 



* Erect perennial herbs: leaves undivided: flowers in naked terminal spikes or racemes, short- 

 pedicelled, 1 to 3 to each bract: calyx campanulate, moderately 5-lobed; two lower teetli tri- 

 angular-subulate; three upper ovate: nutlets globular and witli a roundish scar. 



T. Canadense, L. Soft-pubescent to canescent-tomentose, 1 to* 3 feet high : leaves 

 oblong-ovate to oblong-lanceolate, sharply serrate, short-petioled : spike at length 6 to 12 

 inches long : flowers short-pedicellcd : corolla purple, rose, or sometimes cream-color, half 

 inch long : calyx cancscent, sometimes distinctly short-pubescent ; the 3 upper lobes very 

 obtuse. Spec. ii. 504. T. Viiyiiiicttni, L. I.e. (pi. Gronov. Virg.) ; Schk. Handb. t. 155. 

 Low grounds, Canada to Texas. (Mex.) 



Var. angustatum. Leaves lanceolate, very acutely serrate (2 inches long, 3 to G 

 lines wide) : pubescence all minute. Camp Grant, Arizona, Palmer. 



T. OCCidentale. Loosely pubescent, more branched, a foot or two high : leaves smaller 

 (lor 2 inches long), ovate-oblong to broadly lanceolate: corolla 4 or 5 lines long: calyx 

 villous with viscid hairs; upper lobes acute or the middle one acuminate. Nebraska, 

 (Hoyden, c ) to New Mexico (FeiuUer, Wr'njlit), Arizona (Palmer), ami on the Sacramento, 

 California (T. (.'tjiiatleitM, To IT. in Bot. Wilkes), collected there only by the Wilkes Expe- 

 dition. (T. hijlnlnin, Swartz, has a globular fructiferous calyx, with upper lobes obtuse, 

 nutlets angulate ventrally, &c.) 



* * Low and diffuse herbs: leaves multiTid or incised, having solitary pedicellate flowers in their 

 axils: the uppermost more or less reduced or bract-like: calyx almost 5-parted into subulate- 

 lanceolate equal lobes. 



T. Cubense, L. Glabrous or nearly so, branched from the annual root, about a foot 

 high : leaves cuneate ; the lower obovate-cuneatc or rhomboidal and short-petioled, cre- 

 nately incised, sometimes 3-5-cleft to the middle ; upper sessile, palmately 3-cleft or 3-5- 

 toothed, exceeding the flowers: corolla (pale blue or white, 3 or 4 lines long) hardly 

 exceeding the calyx : nutlets suberous-thickened, obscurely few-ribbed lengthwise and 

 punctate-impressed between the ribs. Mant. 80; Jacq. Stirp. t. 183, f. 74, & Obs. t. 30. 

 T. la-viijatum, Vahl, Symb. i. 40. Texas to S. E. California. (W. Ind., Mex. to Buenos- 

 Ayres.) 



T. laciniatum, Torr. Glabrous or hirsute-pubescent, much branched from a lignescent 

 perennial root, a span or so high : leaves pinnately 3-7-parted into narrow linear entire or 

 2-3-lobed or toothed divisions, rather rigid; the floral much crowded, 3-parted ; upper 

 equalling the flowers: corolla (pale blue or lilac, (3 to 10 lines long) with spatulate lower 

 lobe much surpassing the calyx: nutlets not obviously costate. Ann. Lye. N. Y. ii. '. 

 Benth. in DC. Prodr. xii. 579. T. Cubense, in part, Torr. Bot. Mex. Bound. 135. Plains 

 of Colorado to W. Texas and Arizona. (Adjacent Mex.) 



5. AJUG-A, L. (Formed of privative, and fyyov, a yoke, from the seeming 

 absence of a yoke-fellow to the lower lip of the corolla.) - - Low herbs of the Old 

 World (Europe to Japan and Australia), one scantily naturalized in a few stations : 

 fl. summer. 



A. REPTANS. L. Perennial, a span or so high, with copious creeping stolons : leaves obovate 

 or spatulate, sometimes, repand-sinnate ; cauline sessile; lowest and radical with long taper- 

 ing base ; floral approximate, subtending several sessile blue flowers. Fields, Montreal, 

 Canada, Maclaijan. Saco, Maine, Goodale. (Eu., N. Asia.) 



