126 FAM. 157. 



four lobes flat, erect or spreading; — flowers in axillary, subglobose 

 clusters, approximate or remote; calyx-lobes 5, nearly equal; 

 stamens 4, declined, ------ Mesosphaerum (Hyptis) 



M. spicatum (H. spicata) Pubescent; leaves petioled, deltoid-ovate, crenate- 

 serrate; flower-clusters nearly sessile; corolla much longer than the calyx. 

 Sandy soil. Spring to Fall. 



M. rugosum (H. radiata). Pubescent above; leaves decurrent on the petioles, 

 ovate to linear-lanceolate, somewhat serrate; flower-heads dense, peduncled; 

 calyx and corolla pubescent; corolla small, white dotted with purple. 

 Damp soil. Summer and Fall. 



9. Lowest lobe of corolla boat-shaped, longer than the obtusely 3-4 cleft 



upper part; — leaves large, bluntly serrate, marked with crim- 

 son, green and bronze. Cult, in many colors and kinds, - - Coleus 



10. Anther-bearing stamens 4, long-exserted, partly coiled; — flowers in 



axillary cymes or solitary; calyx short with 5 teeth of which 



2 are very short; corolla slender nearly equally 5-cleft, - - Tricho sterna 



T. dichotomum. Nearly smooth branched stem; leaves lanceolate to oblong; 

 short petioled; corolla blue, pink or white. Sandy soil. Fall. 



10. Anther-bearing stamens 4, not long exserted, erect; — flowers in 



dense, remote or contiguous clusters; calyx-tube 10-ribbed, lobes 

 5, nearly equal; corolla-tube shorter than the calyx; upper cor- 

 olla-lobe somewhat larger than the rest. _ _ _ _ Mentha 



M. piperita, Peppermint. Stems smooth; leaves oblong, oval to ovate, sharply 

 serrate, short-petioled; flowers in interrupted spike-like panicles; calyx 

 smooth; corolla white, pale-purple or blue. Cultivated. 



11. Calyx-lips entire, the upper one crested; — flowers in racemes or 



panicles; corolla 2-lipped, the upper lip arched, the lower lip 

 with 2 small lateral lobes and a larger, spreading, middle lobe; 

 stamens 4, upper pair with 2-celled, lower pair with 1-celled 

 anthers, all ciliate, ------ Scutellaria, Skull-cap 



S. lateriflora. Branching; leaves petioled, ovate- lanceolate, coarsely serrate; 

 flowers small, blue, in axillary racemes, usually 1-sided. Riverswamps. 

 Summer. 



S. integrifolia. Simple, or branching above; leaves petioled, the lower ovate, 

 coarsely toothed, the upper oblong to linear, entire; racemes or panicles 

 few- or many-flowered; corolla blue or pale, pubescent. Dry soil. Sum- 

 mer. 



S. Floridana. Nearly simple; leaves sessile, narrowly linear; racemes few-flow- 

 ered; calyx densely punctate; corolla blue; anthers long-bearded, Swampy 

 pine-land. Summer. 



11. Calyx-lips lobed, both or only one, - - - - - - - -12 



12. Stamens 4 only 2 fertile, or stamens 2, -------13 



12. Stamens 4, all anther-bearing, anthers awnless; — herbs or shrubs 



with flowers in axillary clusters, sessile or peduncled; calyx-tube 

 usually 13-ribbed; corolla 2-lipped, upper lip erect, entire or 

 notched, lower lip 3-lobed, spreading. In sand. Summer, 



Clinopodium (Calamintha), Basil 

 C. macrocalyx. Branching shrub; leaves broadly spatulate, contracted into 

 a narrow base, punctate; corolla scarlet, upper lip notched. 



