©  @Y, Mentha (Tourn.) L. Mint. 
Strongly aromatic herbs with horizontal rootstocks and serrate leaves. 
Flowers perfect, small, in axillary clusters or in terminal slender panicled 
spikes. Calyx campamulate, equally 5-toothed, the teeth triangular. Corolla 
campanulate, appearing nearly equally 4-lobed, the uppermost lobe somewhat 
larger. Stamens 4, exserted. Nutlets smooth. 
© Flowers in axillary clusters 4 M. arvensis 
© Flowers in terminal spikes 
2 Spikes ‘3-6 om. long, 6-8 mm. wide, acute 3, Me spicata 
2. Spikes 1-3 om. long, 12-14 mn. wide, rounded y M. piperita 
= | 
/. 3%, arvensis var. glabrata (Benth,) Fern, Stems from creeping white 
~~ 
rootstocks, erect, 20-60 cm. tall, simple or branching with ascending 
branches, glabrous below, retrorsely hispidulous above, especially on the 
acute angles; leaves ¢.5-5 cm, long, elliptical-ovate, acute or lightly 
qi acuminate, sharply serrate, both surfaces glabrate or thgveins and margins (i 
ciliolate, borne on indefinite petioles 2-10 m, long; axillary clusters 
1.5-2 cm, in diameter, subtended by subulate bractlets; calyces 2,5-3,5 
mm, long, paso teulousy, tie lobes triangular-lanceolate, acute, .8-1.3 mm, 
long, the tube funnelform, globose in fruit; corolla white or tinged with 
pink, 5-6 mm, long, the tube 3 m, long, funnelform, the lobes oblong- 
ovate, spreading, the upper slightly notched, the throat hairy; nutlets 
subglobose, 1 mm. longe 
Common in sandy or rocky places along streams and lake shores; in 
meadows . 
var, lanata Piper, Similar, the stems and usually the calyces woolly with 
white spreading hairs, the leaves sometimes woolly, 
© escent, 
more often short-pub- 
