LABIATE. (MINT FAMILY.) 297 



larly serrate with obtuse appressed teeth or nearly entire : inflorescence vir- 

 gate-spiciform, interrupted, floral bracts very small: calyx deeply bilabiate: 

 corolla smalL 4 lines long, hardly at all exserted ; lower lip little prolonged: 

 style glabrous or nearly so. Plains, Nebraska to Texas and Arizona. 



9. MONABDA, L. HORSE-MINT. 



Aromatic erect herbs, usually tall ; with the large verticillastrate-capitate 

 glomerules single, or in upper axils, and iuvolucrate by numerous sometimes 

 colored outer bracts and floral leaves. 



# Heads solitary and terminal, or sometimes 2 or 3 as if proliferous : stamens 



and style conspicuously exserted from the linear and mostly acute upper lip 

 of the corolla: leaves ovate-lanceolate, acutely more or less serrate. 



1. M. fistulosa, L. Soft-pubescent with short hairs, or somewhat hairy, 

 or glabrate : stem mostly with obtuse angles : bracts whitish or rarely pur- 

 plish, the inner mostly hirsute-ciliate : calyx conspicuously and densely 

 bearded at the throat : corolla pubescent, at least on the upper lip, purple 

 or purplish-dotted, an inch or more long. Nearly across the continent. A 

 polymorphous species. 



Var. media, Gray. Corolla deep purple. Synopt. Fl. ii. 374. Alleghany 

 and Rocky Mountains. 



Var. mollis, Benth. Corolla from flesh-color to lilac, glandular, and its 

 upper lip hairy outside or more bearded at the tip : leaves paler, soft pubes- 

 cent beneath : throat of the calyx mostly filled with dense beard. Extend- 

 ing to the Saskatchewan, British Columbia, and Arizona. 



* * Heads commonly in the axils of all the upper pairs of leaves, or interrupted- 



spicate, follose-bracteate : upper face of the floral leaves often canescent and 

 purple-tinged : corolla with shorter tube, more dilated throat ; the upper arch- 

 ing seldom surpassed by the stamens : leaves lanceolate or oblong, sparsely 

 serrate or denticulate. 



2. M. punctata, L. Stem commonly 2 feet high : floral leaves and 

 bracts (either whitened or purplish or both) often slender acuminate, mostly 

 muticous : calyx-teeth lanceolate- or triangular-subulate, rigid, soon stellate- 

 spreading : corolla yellowish with copious brown-purple spots. From Colorado 

 to Florida and New York. 



3. M. Citriodora, Cerv. Usually rather robust, the larger forms 2 or 3 

 feet high : bracts narrowly oblong, colored as in the last, with spreading or 

 recurving and slender aristate tips: calyx-teeth slender-aristiform, at length 

 usually spreading : corolla white or pinkish, not spotted, but more or less punc- 

 tate. M. aristata, Nutt. Plains of Nebraska to Texas, E. Colorado, and 

 Arizona. 



10. LOPH ANT HITS, Benth. 



Mostly tall and coarse herbs : with serrate petioled leaves, the lower usually 

 subcordate and the upper ovate, and small flowers in dense and sessile verticil- 

 lastrate glomerules, which are crowded into a terminal spike : floral leaves 



