186 PRACTICAL BOTANY. 



441. Calyx 2-lipped .442 



Calyx regularly or nearly equally 5-lobed or 



toothed 445 



443. Calyx hairy in the throat, ovoid, or tubular, gib- 

 bous near the base. Upper corolla-lip notched at the top. 

 Fertile stamens 2, the upper pair reduced to sterile fila- 

 ments, or wanting. Hedeoma. 

 Calyx not hairy in the throat 443 



443. Calyx 13-nerved ; its upper lip with 3 awned teeth, 

 the lower with 2 nearly awnless teeth. Flowers small, 'pale 

 bluish-purple, crowded in axillary and terminal, globose, capi- 

 tate whorls, BlephiUa (482). 



Calyx not 13-nerved 444 



444. Upper lip of the yellow corolla consisting of 4, 

 nearly equal, small lobes; lower lip undivided, long and 

 fringed. Stamens much exserted, divergent. (Corolla ex- 

 haling the odor of lemons.) Collinsonia Canadensis, L. 



Upper lip of the ringent corolla straight, scythe- 

 shaped ; lower spreading or pendent, 3-lobed. Connectilc 

 transversely jointed to the filament, bearing at each end a 

 cell of the halved anther, one end ascending, the other de- 

 scending. Flowers blue, or violet-purple. Salvia. 

 443. Flowers large, bluish, pale purple, or bright red ; 

 npper lip of the ringent corolla linear ; lower lip reflexed and 

 3-lobed, middle lobe largest. Monarda. 

 Flowers small, pale red. Corolla pubescent; upper 

 lip flattish, usually notched ; lower spi'eading, 3-cleft. Herb 

 delightfully fragrant. Cuuila Mariana, L. 



446. Leaves opposite -. 447 



Leaves radical, roundish, petioled. Scapes with 



foliaceous, partly clasping bracts. Calyx 4-parted. Corolla 

 slightly bell-shaped, either with the upper lip entire and a 

 little longer and narrower than the lower, 3-toothed lip ; or 

 the upper lip notched and the lower 3-parted. Very rarely 

 2 additional lower stamens. 



(326) Synthyris Houghtoniana, Benth. 



447. A tree. Calyx deeply 2-parted. Corolla, bell- 

 shaped, 4- or 5-cleft, slightly 2-lipped, large. Pod long and ' 

 slender. Seeds winged. Leaves ovate, cordate, ample. .328 



Herbs. Calyx 5-lobed, or 4-toothed 448 



