246 MINT FAMILY. 



* * * Corolla decidedly 2-lipped : calyx S-toothed, regular, or sometimes obscurely 

 2-lipped, not ctoung in fruit : the tettlt commonly awl-shaped or triangular^ 

 ofttn riyid or spiny-tipped. 



*- Stamens included in the tube of the corolla : calyx 10-toothed. 



31. MARRUBIUM. Teeth of the calyx awl-shaped or spiney-tipped, recurved 



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

 flowers in axillary capitate whorls. 



-t- (- Stamens raised out of the tube of the corolla : calyx o-toothed. 

 M- Anthers opening crosswise by 2 unequal valves, the smaller one dilate. 



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 of spreading lower lip obcordate. Flowers in axillary whorl-like 

 clusters. 



-. -w. 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, its base much narrowed. (Lessons, p. 102, fig. 209.) 

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



34. LEONURUSi Calvx top-shaped, the awl-shaped teeth when old spreading and 



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

 Stameru parallel. Nutlets truncate and sharply 3-angled. Steins 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, mu.-t 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. HOLUCCELLA. 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. TETJCRIUM, GERMANDER. (Named for Teucer, king of Troy.) ^ 

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



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

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



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

 hair-like 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) 



T. dichdtomum, COMMON B. or BASTARD PENNYROYAL. Sandy fields 

 E. & 8. : 6'- 12' high, with 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 equal 

 flower, i. o. parts of corolla regular.) Q) 



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

 pubescent, G' - 12' high, with ob'ong's-Jierved entire leaves, and scattered small 

 \>lue flowers on axillary peduncles : all summer. 



