270 THE FLORA. 



g Cor. tube straight. Lvs. small, subcrenate or entire. Calaminth. Calamin'tha. 4 

 g Corolla tube curved upwards. Leaves large, coarse-crenate. Balm. Melis'sa. 



h Anthers halved, the halves widely separated, each 1-celled. Sage.^KL'wK. 5 



h Anthers halved, one half present, 1 celled. Filaments toothed. Shrub, t 



Rosemary. Eosmari'nus. 



h Anthers whole, 2-celled. Calyx snbsequally 5-toothed. 



Mountain Mint. Monar''da. 6 



h Anthers whole, 2-celled. Calyx labiate, teeth bristle-shaped. Blephil''ia. 

 k Leaves serrate. Stamens diverging. Fls. spiked. Tall Hyssop. Lophan^thus. 

 k Lvs. serrate. Stam. all ascend. Fls. capitate. Dragonhead. Dracoceph^alum. 

 k Lvs. crenate, cordate or reniform. Corolla smooth inside. Catmint. Nep'eta. 7 

 k Leaves crenate, cordate. Corolla tube very broad, hairy inside. Cedronel''la. 



m Calyx lips toothed. Filam. forked. Fls. spiked. Self-heal. Brunel''la. 8 



m Calyx lips entire, the upper appendaged on back. Skullcap. Scutella''eia. 9 

 n Calyx 3-lobed. Anthers all distinct. Corolla large, purplish. S. Macbri'dea. 

 n Calyx 4-lobed. Anthers, upper pair, connate. White. W. Synan'dra.IO 



o Cor. tube inflated in the midst, whitish. Tall. TAon's-heart. Physoste'gia.11 



o Cor. tube inflated at the throat, purple. Lvs. roundish. Henbit. Lam^icm. 



o Corolla inflated in the broad concave upper lip. Jerusalem Sage. Fhlomis. 



o Corolla not inflated, short p 



p Calyx salver- form, 10-veined. Bk(ch Boar hound. Ballo'ta. 



p Calyx bro.ad-cam.panulate, netted. Molucca Balm. Molluccel'la. 



q Lvs. serrate. Anth. open crosswise. Nuts truncate. Hemp Nettle. Galeop'sis. 



q Leaves serrate. Anth. open lengthwise. Nuts obtuse. Hedge Nettle. Stachys. 



q Leaves lobed. Nuts truncate at top, 3-angled. Motherwort. Leonu^rus. 



s Cor. white, upper lip flattish. Style equally bifid. Hoarhound. Marru'bium. 



R Corolla white, upper lip concave. Style unequally bifid. S. Leucas. 



s Corolla scarlet, exserted. Calyx upper tooth longest. Lion''s-ears. Leono'tis. 



1. MEN'THA. Mint. 



Calyx equally 5-tootlied. Corolla nearly regular, tube included in the 

 calyx, border 6-cleft, the upper lobe mostly notched. Stamens 4, equal, 

 straight, erect, distant. — Aromatic herbs, with the pale purple or white 

 flowers in close axillary clusters, or forming spikes. 



* Whol-ls of flowers remote, axillary, not in spikes. Leaves petiolate 1, 2 



* Whorls of flowers approximate, forming terminal spikes. . . .3, 4 



1 M. Canaden'sis. Wild Mint. Plant grayish, fragrant. Lvs. acute at each end. 



2 M. arven'sis. Fiud M. Plant green, ill-scented. Lvs. frequently obtuse at base. 



3 M. piperi'ta. Peppermint. Leaves petiolate, ovate, serrate, smooth. Spikea 



few, thick, short. Stems 2-3f. high. 



4 M. vir'idis. Spearmint. Leaves sessile, lance-oblong, acute, serrate. Spikes 



many, slender, long. Stems l-2f. high. 



