CL. XIV. J DIDYNAMIA GYMNOSPERMIA. 245 



the upper slightly notched. Filaments awl-shaped, straight, dis- 

 tant, arising from the throat of the corolla ; anthers two-lobed. 

 Germen superior, four-lobed. Style thread-shaped, erect ; stigma 

 protruded, divided into two sharp, equal, spreading segments. 

 Seeds four, small, in the bottom of the calyx. Name, minthe, an 

 ancient Greek term. 284. 



1. AT. si/lvestris. Horse Mint. Spikes oblong, scarcely interrupted; 

 leaves deeply serrate, acute, downy ; bracteas narrow lance-shaped; calyx 



hairy. The whole plant covered with fine downy hairs : stems erect, 



two or three feet high, branched, leafy, with deflected hairs : leaves 

 sessile, egg-shaped, hoary : spikes terminal, with linear bracteas, and 

 pale-purple flowers. Perennial : flowers in August and September: grows 

 in moist .waste ground: not common. Eng. Bot. vol. x. pi. 686. Eng. 

 FL vol.iii. p. 73. 854. 



2. IU. viridis. Spear Mint. Spikes elongated, interrupted ; leaves 

 lance-shaped, acute, naked, sessile ; bracteas linear ; flower-stalks smooth. 

 Stems two or three feet high, erect, branched, acutely four-cor- 

 nered, smooth : spikes panicled, elongated, acute, the whorls of pale- 

 purple flowers a little distant. All the species of mint have a strong 

 aromatic smell, but the properties of this being more agreeable than 

 those of the others, it has been preferred, and is employed for culi- 

 nary and medicinal purposes. Perennial : flowers in August : grows in 

 watery places : rare, and perhaps never truly wild. Eng. Bot. vol. xxxiv. 

 pi. 2424. Eng. FL vol. iii. p. 75. 855. 



3. M. rotundifdlia. Round-leaved Mint. Spikes oblong, interrupted, 

 somewhat hairy ; leaves elliptical, obtuse, wrinkled, acutely crenate, 



shaggy beneath ; bracteas lance-shaped. The whole plant covered 



with long soft hairs : stems about two feet high : under surface of the 

 leaves white and woolly. Perennial : flowers in August and September : 

 grows in wet places : not common. Eng. Bot. vol. vii. pi. 446. Eng. 

 Fl. vol. iii. p. 74. 856. 



4. HI. piperita. Pepper Mint. Spikes obtuse, interrupted below ; 

 .eaves stalked, somewhat egg-shaped, smoothish ; calyx very smooth at 



the base. Stems nearly erect, roughish, with recurved hairs, from 



two to four feet high : leaves dark-green, acute, serrate, more hairy be- 

 neath : spikes interrupted and leafy below: corollas purple: bracteas 

 lance-shaped, fringed. Perennial : flowers in August and September : 

 grows in watery places. The only apparently natural station that I have 

 seen for it is the pools near Selkirk, formed by the Yarrow. The essen- 

 tial oil and distilled water of this plant are used in a variety of cordial or 

 medicinal preparations. Eng. Bot. vol. x. pi. 687. Eng. Fl. vol. iii. 

 p- 76. 857. 



5. M. citrdta. Bergamot Mint. Spikes in heads, very obtuse ; leaves 

 stalked, heart-shaped, naked on both sides ; calyx and flower-stalks 



smooth. Stems about two feet high, branched : leaves serrate : flowers 



in round, terminal heads : corolla reddish-purple. Perennial : flowers 

 in August and September : grows in watery places : rare, and not indi- 

 genous. Eng. Bot. vol. xv. pi. 1025 : M. odvrata. Eng. Fl. vol. iii. 

 P- 78. 858' 



6. M. hirsuta. Hairy Mint. Flowers in heads or whorls ; leaves 

 stalked, egg-shaped, serrate, hairy; calyx hairy; flower-stalks with re- 



