MINT FAMILY 147 



corolla, the upper lip erect, concave or nearly flat, entire, the lower lip 

 spreading or turned abruptly downward, 3-lobed, stamens 4 in pairs, the 

 lower or outer pair the longer, ovary deeply 4-parted, style 2-cleft, nutlets 

 3-sided, smooth ; flowers whorled in dense axillary clusters ; leaves palmate- 

 ly cleft, parted or toothed ; biennial or perennial. 

 Flowers pink to white, 6-10 mm. long; leaves 3-5-cleft L. cardiaca 



LYCOPUS Linne 1753 WATER HOARHOUND 

 (Gr. lykos, wolf, pous, foot) 



Sepals 4-5, united into a bell-shaped calyx, petals 4, white or purple, 

 united into a funnelform or bell-shaped to cylindric corolla, perfect stamens 

 2, ovary deeply 4-parted, style slender, 2-cleft, nutlets narrowed below ; 

 flowers whorled in dense axillary clusters ; leaves toothed or deeply cut ; 

 perennial. 



1. Leaves pinnatifid or deeply cut L.americdnus 



2. Leaves merely sharply and coarsely toothed L. lucidus 



MENTHA Linne 1753 MINT 

 (Gr. mintha, Lat. mentha, mint) 



PL 24, fig. 3. 



Sepals 5, united into a bell-shaped to tubular, 10-nerved calyx, regular 

 or slightly 2-lipped, petals apparently 4, purple, pink or white, united into 

 a somewhat irregular corolla, stamens 4, ovary 4-parted, style 2-cleft, nut- 

 lets ovoid, smooth; flowers in axillary whorls or terminal dense or inter- 

 rupted spikes; leaves simple, toothed; perennials. 



1 . Flowers in axillary clusters ; leaves petioled M. cana-densis 



2. Flowers in terminal spikes ; leaves nearly sessile M. spicdta 



MARRUBIUM Linne 1753 HOARHOUND 

 (Lat. name from the Hebrew for bitter) 



Sepals united into a 5-10-nerved, 5-10-toothed calyx, the teeth spread- 

 ing or recurved in fruit, petals 5, white or purplish, united into a 2-lipped 

 corolla, the upper lip erect, "the lower spreading, 3-cleft, stamens 4 in pairs, 

 included, style 2-cleft, ovary deeply 4-lobed, nutlets ovoid, smooth ; flowers 

 in dense axillary clusters; leaves petioled, toothed, wrinkled; perennial. 

 Leaves ovate-rounded, crenate ; flowers small, white M. vulgare 



MONARDA Linne 1753 BEE BALM, HORSE-MINT 

 (Named for Monardez, a Spanish writer on medical plants) 



PL 24, fig. 4. 

 Sepals 5, united into a 5-toothed tube, the throat usually hairy, petals 



