250 DIDYNAMIA GYMNOSPEKMIA. [CL. X 



ground : common. Eng. Bot. vol. xxiv. pi. 1675. Eng. Fl. vol. iii. 

 p. 99. Probably only a variety of the next species. 876. 



3. S. palustris. Marsh Woundwort. Whorls of from six to ten 

 flowers; leaves lance-shaped, embracing the stem; root tuberous, 



- Stem erect, from two to three feet high, rough with deflected 

 bristles: leaves serrate, somewhat woolly beneath: flowers purplish- 

 red, variegated with white and dark purple. Perennial : flowers in 

 August : grows about edges of rivers, ponds, and ditches, and in 

 wet fields : frequent, Eng. Bot. vol. xxiv. pi. 1675. Eng. FL vol. 

 iii. p. 99. 877. 



4. S. Germdnica. Downy Woundwort. "Whorls many-flowered; 

 leaves egg-shaped, crenate, densely covered with white woolly hairs ;. 

 stem woolly, erect. - Stems two feet high : corolla light-purple : 

 palate striped with white. Perennial : flowers in September : grows 

 in hedges and by road-sides in England : rare. Eng. Bot. vol. xii. 

 pi. 829. Eng. Fi. vol. iii. p. 100. 878. 



5. S. arvensis. Corn Woundwort. Whorls six-flowered ; stem. 

 weak ; leaves heart-shaped, obtuse, crenate, slightly hairy. - Stem 

 branched, ascending : corolla small, light-purple, palate white and 

 spotted with purple. Annual : flowers in July and August : grows 

 in gravelly or sandy fields : frequent. Eng. Bot. vol. xvii. pi. 1154. 

 Eng. Fl. vol. iii. p. 1 00. 879 . 



6. S. dnnua. Pale Annual Woundwort. Whorls six-flowered ; 

 leaves lanceolate, broadly serrate, three-nerved, the lower stalked. 



- Stem erect, downy : calyx hairy, with awl-shaped segments : 

 corolla light-purple. Annual : flowers in August : found in a field 

 between Gadshill and Eochester, by Jos. Woods, Esq. Eng. Bot. 

 Suppl. pi. 2669. Brit. Fl 4th ed. p. 233. 880. 



12. BALLO'TA. BLACK HOREHOTJND. 



Calyx of one leaf, tubular, oblong, with five comers, ten ribs, 

 and ten furrows, the limb dilated, spreading, plaited, regular. 

 with five pointed teeth. Corolla gaping ; tube cylindrical, as 

 long as the calyx ; upper lip erect, egg-shaped, notched ; lower 

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

 awl-shaped, directed towards the upper lip; anthers oblong, 

 two-valved. Germen small, four-lobed. Style thread-shaped, 

 as long as the stamens ; stigma slender, cleft. Seeds four, egg- 

 shaped, in the bottom of the somewhat hardened calyx. Named 

 from ballo, to reject, on account of its offensive odour. 291 . 



1. B. nigra. Black Horehound. Leaves egg-shaped, undivided, 

 serrate ; calyx funnel-shaped, abrupt, with short spreading teeth. 



- Stem two or three feet high, erect, branched, downy : calyx 

 dilated at the mouth : corolla dull purple : upper lip cleft, covered 

 externally with white hairs, lower marked with white veins. Pe- 

 rennial: flowers in July and August : grows among rubbish, and m 

 hedges: common. Eng. Bot. vol. i. pi. 46. Eng. Fl. vol. iii. p. 101. 



881. 



13. MARRU'BIUM. HOREEOUND. 



Calyx of one leaf, tubular, funnel-shaped, with ten furrows, 

 the limb spreading, regular, generally with ten narrow teeth. 



