1 64 LABIATAE 



2. M. citriodora Cerv. LEMON MINT. Annual, l-3 high, puberu- 

 lent : leaves lanceolate, nearly sessile, sharply serrate : calyx teeth 

 bristle-pointed: corolla pinkish or whitish, V long. Sparingly adventized 

 near Sheffield. July-August. 



14. BLEPHILIA Eaf. 



Calyx 13-nerved, not villous in the throat, the three upper teeth awned, 

 the two lower shorter. Corolla, etc., as in Monarda. Flowers in glomer- 

 ules, forming terminal spikes. 



1. B. hirsuta (Pursh) Torr. WOOD MINT. Perennial, l-3 high, 

 pubescent : leaves ovate, sharply serrate, slender-petioled : outer bracts 

 linear-lanceolate, acuminate pointed. Common throughout in rich 



woods. June-August. 



15. HEDEOMA Pers. 



Ours are annuals with blue, axillary clustered flowers. Calyx 13-nerved. 

 Upper lip of corolla erect, emarginate, the lower 3-lobed, spreading. 

 Anther sacs divergent. 



Leaves ovate- oblong, serrate, petioled. 1. H. pulegioides. 



Leaves linear, entire, sessile. 2. H. hispida. 



1. H. pulegioides (L.) Pers. PENNYROYAL. S'-IS' high, hairy : 

 corolla 3 X/ long : sterile filaments manifest. Abundant in dry woods. 

 August-October. 



2. H. hispida Pursh. SPRING PENNYROYAL. S'-IS' high, pubes- 

 cent: corolla 3 /x long: sterile filaments none. Common in barrens 

 throughout. April- June. 



16. MELISSA L. 



Calyx 13-nerved, its upper lip three-toothed, the lower 2-parted. 

 Upper lip of corolla notched, the lower 3-parted. Anther sacs divaricate. 



1. M. officinalis L. GARDEN BALM. Perennial, pubescent, l-3 

 high : leaves ovate, petioled, crenate : corolla 6 7/ long, whitish. Along 

 roadsides near Independence. Rare. July-September. 



17. KOELLIA Moench. MOUNTAIN MINT. 



Tufted perennials, l-3 high, with white, purplish-dotted flowers. 

 Calyx about 13-nerved, equally 5-toothed in ours. Upper lip of corolla 

 nearly entire, a little arched, the lower 3-lobed, spreading. Anther 

 cells parallel. 



Stems smooth. 1. K. flexuosa. 

 Stems pubescent to downy. 

 Leaves entire. 



Plant minutely pubescent. 2. K. Virginiana. 



Plant hoary-pubescent. 3. K. pilosa. 



Leaves serrulate. 4. K. verticillata. 



1. K. flexuosa (Walt.) MacM. Nearly glabrous throughout : leaves 

 narrowly linear, entire : heads 2 // -4 // broad : calyx teeth pungently 



