246 DIDYNAMIA GYMNOSPERMIA. [CL. XIV. 



with recurved hairs. This species varies exceedingly in its 



appearance : flowers pale-purple. Perennial : flowers in August 

 and September : grows in ditches, and by the sides of pools, lakes, 

 and streams : common. Eng. Bot. vol. vii. pi. 447 and 448. Eng. Fl. 

 vol. iii. p. 79. Of this M. acutifolia of Smith, Eng. Bot. pi. 2415, 

 Eng. Fl. vol. iii. p. 81, appears to be a variety. 859. 



7. M. rubra. Tall Red Mint. Flowers in whorls, stem erect, 

 zigzag ; leaves stalked, broadly egg-shaped, serrate, smooth ; 



flower-stalks and lower part of the calyx smooth. Stems from 



four to five feet high : leaves of a deep shining green, bracteas 

 linear, fringed : corolla large, purplish-red. Perennial : flowers 

 in September : grows in watery places : not common. Eng. Bot. 

 vol. xx. pi. 1413. Eng. Fl vol. iii. p. 82. 860. 



8. M. gentilis. Bushy Red Mint. Flowers in whorls ; stem much 

 branched, spreading ; leaves stalked, egg-shaped, serrate, slightly 

 hairy ; flower-stalks and lower part of the calyx nearly smooth. 



Stem erect, bushy, with numerous spreading branches, about 

 a foot and a half high : bracteas lance-shaped, hairy : corolla pale- 

 purple. Perennial : flowers in August : grows in watery places : 

 rare. Eng. Bot. vol. xxx. pi. 2118. Eng. Fl. vol. iii. p. 83. M. gracilis 

 of Smith, Eng. Bot. pi. 449, Eng. Fl. vol. iii. p. 84, is probably a va- 

 riety of this. 861. 



9. M. arvensis. Corn Mint. Flowers in whorls ; leaves stalked, 

 egg-shaped ; stem branched, spreading ; calyx bell-shaped, covered 



with spreading hairs Pale-green, hairy ; stems from six inches 



to a foot long, generally decumbent : leaves serrate : flowers pale- 

 purple. The smell of this species has been compared to that of 

 green cheese. Perennial : flowers from June to September : grows 

 in corn-fields, in dry ditches, and in pastures : common. Eng. Bot. 

 vol. xxx. pi. 2119. Eng. Fl. vol. iii. p. 85. 862. 



10. M. PuUgium. Penny Royal. Flowers in whorls ; leaves 

 egg-shaped, blunt, obtusely crenate, downy ; stems prostrate ; 

 flower-stalks and calyx downy. Stems hairy, branched, creep- 

 ing : leaves stalked, full of pellucid dots : corolla light-purple, ex- 

 ternally hairy. Perennial : flowers in September : grows in moist 

 heaths and pastures, in England, and the south of Ireland : rare. 

 Eng. Bot. vol. xv. pi. 1026. Eng. Fl. vol. iii. p. 87. 863. 



6. GLECHO'MA. GROUND IVY. 



Calyx of one leaf, tubular, cylindrical, striated, with five 

 pointed, unequal, marginal teeth. Corolla gaping tube slen- 

 der, compressed ; upper lip erect, obtuse, cleft half-way down ; 

 lower lip three-lobed, the middle lobe larger and cleft. Fila- 

 ments covered by the upper lip ; anthers of each pair coming 

 together, and forming a cross. Germen egg-shaped, four-cleft. 

 Style thread-shaped, curved under the upper lip ; stigma cleft, 

 acute, Seeds four, egg-shaped, in the bottom of the permanent 

 calyx. Name from glechon, a sort of thyme. 285. 



1. G. hederdcea. Ground Ivy. Gill. Ale-hoof. Leaves kidney- 

 shaped, crenate. Roots creeping, sending out long runners : 



stems frequently several feet long, creeping : leaves stalked : 

 ^flowers bluish-purple, with a variegated palate. This plant is aro- 



