246 MINT FAMILY. 



* * * &>rolla decidedly 2-lipped : calyx b-tootfied, regular, or sometimes obscurely 

 %-iipped, not closing in fruit : the tetth commonly awl-shaped or triangular, 

 often rigid or spiny-tipped. 



t- Stamens included in the lube of the corolla : calyx 10-toothed. 



31. MARRUBIUM. Teeth of the calyx awl-shaped or sniney-tipped, recurred 



after flowering. Corolla small: upper lip erect. Bitter-aromatic plants: 

 flowers in axillary capitate whorls. 



+- *- Stamens raised out of the tube of the corolla : calyx o-toothed. 

 + Anthers opening crosswise by 2 unequal valves, the smaller one ciliate. 



32. GALEOPSIS. Calyx tubular bell-shaped, 5-nerved, with spiny-tipped teeth. 



Corolla enlarged "in the throat, the ovate and entire upper lip arched, the 

 middle lobe or spreading lower lip obcordate. Flowers in axillary whorl-like 

 clusters. 



+ ++ Anthers opening lengthwise in the ordinary way. 



33. LAMIUM. Calyx tubular bell-shaped, with 5 awl-shaped spreading teeth. 



Corolla much enlarged in the throat, the upper lip arching and with a narrow 

 base, lateral lobes of lower lip very short, the middle one rounded and spread- 

 ing or turned down, iN base much narrowed. (Lessons, p. 102, fig. 209.) 

 Stamens ascending under the upper lip. Nutlets truncate at the top. 



34. LEONURUS. Calyx top-shaped, the awl-shaped teeth when old spreading and 



spiny-pointed. Corolla like Stachys, but middle lobe of lower lip obcordate. 

 Stamens parallel. Nutlets truncate and sharply 3-angled. Stems erect. 

 Flowers in close whorls in the axils of cut-lobed leaves. 



35. STACHYS. Calyx .mostly tubular bell-shaped, the teeth triangular or awl- 



shaped, sometimes rigid or even pungent. Corolla not enlarged in the throat, 

 the upper lip entire or nearly so, the lower 3-lobed with the middle lobe 

 nearly entire. Stamens ascending under the upper lip, but the outer pair 

 turned down after discharging their pollen! Nutlets obtuse, but not trun- 

 cate. Flowers crowded in whorls, most of these commonly approximate in a 

 terminal raceme or spike. 



36. BETONICA. Like Stachys, but calyx more tubular and with awn-like teeth, 



tube of corolla longer and its upper lip sometimes notched, and the stamens 

 generally remaining parallel. 



37. PHLOMIS. Calyx tubular, with rigid narrow awl-shaped teeth from the 



notch of as many very short and broad lobes. Corolla as in Stachys. Upper 

 pair of stamens (rather the longer) with an awl-shaped appendage at the base 

 of the filaments. 



38. MOLUCCELLA. Calyx membranaceous and greatly enlarged, funnel-form, 



the border reticulated, veiny, entire, except 5 mucronate points. Corolla 

 much shorter than the calyx; the middle lobe of its lower lip obcordate. 

 Nutlets 3-sided. 



1. TEfjCRITJM, GERMANDER. (Named for Tmcer, king of Troy.) 11 

 T. Canadense, our only species, in low grounds, l-3 high, downy, 



with ovate-lanceoiate serrate leaves downy beneath, and pale purple or rarely 

 white flowers collected in a long spike, in late summer. 



2. TRICHOSTEMA, BLUE CURLS. (Name from the Greek, means 

 fatfHite stamens.) Ours are branching loosely-flowered rather clammy low 

 herbs, with entire leaves, and small flowers 'as it were panicled, blue, or 

 changing to purple, in summer and autumn. 



^ T. dich6tomum, COMMON B. or BASTARD PENNYROYAL. Sandy fields 

 ^' ^ ^: : 6 ' ~ l ~' '''-'' w ' tn mostly lance-oblong short-petioled leaves. 



T. lineare, from New Jersey S., has linear or lance-linear smoother leaves. 



3. ISANTHUS, FALSE PENNYROYAL! (Name in Greek means e<,ual 

 jtower, i. i 1 . parts of corolla regular.) 



I. CSertlleus. Common in .sandy or sterile soil ; bushy-branched, clammy- 

 pubescent, 6' - 12' high, with oblong 3-nerved entire leaves, and scattered small 

 Uue flowers on axillary peduncles : all summer. 



