I 



LABiAT.i-:. (mint rA.MIl.V.) 405 



• • Anthers more or less approximate in pairs; tlieir cells divuricatc or divei-gent ; filaments 

 ascending, not exscrtcd. 



23. Nepeta. Calyx more or less curved, equally 6-tootlied. 



24. Dracocephaluin. Calyx straight, the upper tooth much the larger. 



Tribe V. SCLTEL,L,AKINE^. Stamens 4, ascending and parallel. Calyx bilabiate, 



closed in fruit; the rounded lii>s entire. Corolla bilabiate, the upper lip arched. 



23. Scutellaria. Calyx with a helmet-like projection on the upper side. 



Tribe VI. STACHYDE.^. Stamens 4, parallel and ascending under the galeate or 

 concave upper lip, tiie lower (outer) pair longer (except in n. 31, 32). Calyx 5-10- 

 nerved, not 2-lipped (except in n. 2G). 



* Calyx reticulate-vemy, deeply bilabiate, closed in fruit. 



26. Brunella. Calyx nerved and veiny ; upper lip flat, 3-toothed, the lower 2-cleft 



* * Calyx thin, inflated in fruit, obscurely nerved, 3-5-lobed. oi)en. 



27. Physostegla. Calyx 5-toothed or .Vlobed. Antl.ii -. ells parnllel. 



28. Synaiidra. Calyx almost equally 4-lobed ! Anthei-cells widely divei-gent. 



• « * Calyx of firmer texture, distinctly 5-10-nerved or striate, 5 - 10-toothed. 

 -t- Stamens included in the short oorolla-tube, its upper lip merely concave. 



29. Marrubium. Calyx tubular, 5-10-nerved, and with 5 or 10 awl-shaped teeth. 



■t- -t- Stamens ascending under the galeate upper lip of the corolla. 

 ** Stamens not deflexed after anthesis ; naturalized from the Old World. 

 BO. Ballota. Calyx somewhat funnel-forni, expanding above into a spreading 5-toothed 

 border. Nutlets roundish at top. Upper lip of the corolla erect. 



31. Plilomis. Calyx tubular, the 5 teeth abruptly awned. Upper lip of the corolla arched. 



32. Leonurns. Calyx top-shaped, the rigid spiny-pointed teeth soon spreading. Nutlets 



truncate and acutely 3-angled at top. Leaves cleft or incised. 



33. Liaiuiuni. Calyx-teeth not spiny-pointed. Nutlets sharply 3-angled, truncate. 



34. Galeopsis. Calyx tubular-bell-shaped ; the 5 teeth spiny-pointed. Anthers trans- 



versely 2-valved, the smaller valve ciliate. 



*~- ++ Stamens often deflexed or contorted after anthesis. 



35. Stachys. Calyx tubular-bell-shaped, equally 5-toothed or the 2 upper teeth united into 



one. Nutlets rounded at top. 



1. TRICHOSTEMA, L. Blue Curls. 



Calyx bell-shaped, oblique, deeply 5-cleft ; the 3 upper teeth elongated and 

 partly united, the 2 lower very short. Corolla 5-lobed ; the lobes narrowly ob- 

 long, declined, nearly equal in length ; the 3 lower more or less united. Sta- 

 mens 4, with very long capillary filaments, exserted much beyond the corolla, 

 curved; anther-cells divergent and at length confluent. — Low annuals, some- 

 what clammy-glandular and balsamic, branched, with entire leaves, and mostly 

 solitary 1-flowercd pedicels terminating the branches, becoming lateral by the 

 production of axillary branchlet.s, and the flower appearing to be reversed, 

 namely, tlie short teeth of the calyx u])ward, etc. Corolla blue, varying to 

 pink, rarely white, small; in .snmmer and autumn. (Name comi)o.sed of dp(^, 

 hair, and arriixa, sUnncn, from the ca|)illary filaments.) 



1. T. dichotomum, L. (H.vstakd rj;NNYRovAL.) ^'iscid with rather 

 minute pubescence ; leaves lance-oblonf/ or rhombic-lanceolate , rarely lance-linear, 

 short-petioled. — Sandy fields, E. Mass. to Ky., south to Fla. and Tex. 



2. T. line^re, Nutt. Pubemlent, more slender and less forked ; leaves 

 linear, nearly smooth. — Conn, to La., near the coast; in sandy ground. 



