CL. XIV.] DIDYNA3IIA ANGIOSPERMIA. 255 



inches high, simple, hairy : leaves sessile in pairs on the opposite sides of 

 the stem, somewhat heart-shaped : flowers axillar, forming a close leafy 

 spike : corolla purplish-blue : calyx purplish. Perennial : flowers in July : 

 grows in elevated pastures, in the Highlands of Scotland and the north of 

 England : rare. Eng. Bot. vol. vi. pi. 361. Eng. Fl. vol. iii. p. 117. 



894. 



2. B. viscosa. Yellow Bartsia. Leaves lance-shaped, serrate, the 

 upper alternate ; flowers lateral and distant ; stem round ; root fibrous. 



Stem erect, downy, about a foot high : corolla yellow, with purple 



stains. Annual : flowers in July and August: grows in marshy ground, 

 along the west coast : frequent. Eng. Bot. vol. xv. pi. 1045. Eng. Fl. 

 vol. iii. p. 118. 895. 



3. B. Odontites. Red Bartsia. Leaves lance-shaped, serrate, the 

 upper alternate ; flowers in unilateral clusters ; stems square, branched. 

 Stem from six inches to a foot high, branched, the branches ter- 

 minating in a leafy cluster of numerous rose-coloured flowers. Perennial : 

 flowers in July and August : grows in moist meadows and pastures, and 

 in corn-fields and by road-sides : common. Eng. Bot. vol. xx. pi. 1415. 

 Eng.Fl. vol. iii. p. 119. 896. 



22. RHINA'NTHUS. YELLOW-RATTLE. 



Calyx of one leaf, roundish, inflated, compressed, with four 

 nearly equal, acute, marginal teeth. Corolla gaping ; tube nearly 

 cylindrical, as long as the calyx ; upper lip narrower, helmet- 

 shaped, compressed, slightly cleft ; lower lip broader, expanded, 

 deeply divided into three obtuse segments, the middle one some- 

 what larger. Filaments thread-shaped, shorter than the upper lip, 

 and concealed by it ; anthers two-lobed, hairy. Germen egg- 

 shaped, compressed, with a channel at each side. Style thread- 

 shaped, curved, a little longer than the stamens ; stigma obtuse, 

 bent inwards. Capsule roundish, compressed, with a small point, 

 two-celled, two-valved ; partitions transverse, united. Seeds com- 

 pressed, imbricated, bordered. Name, from rhin, the nose, and 

 anthos, a flower. 301. 



1. R. Crista-gdlli. Yellow-rattle. Stem branched, leaves lance- 

 shaped, serrate ; calyx smooth ; seeds with a dilated membranous border. 



Stem about a foot high, generally with a few branches, sometimes 



bushy : leaves rough, wrinkled : flowers axillar, crowded into a leafy 

 spike : calyx membranous : corolla yellow : the ripe seeds rattle in the 

 capsule. Annual : flowers in June : grows in pastures : common. Eng. 

 Bot. vol. x. pi. 657. Eng. Fl. vol. iii. p. 120. A variety of large size and 

 slight difference in the leaves is considered by some as a distinct species, 

 under the name of JR. mdjor. Eng. Bot. Suppl. pi. 2737. Brit. Fl. 4th 

 ed. p. 236. 897. 



23. EUPHRA'SIA. EYE-BRIGHT. 



Calyx of one leaf, tubular, cylindrical, ribbed, with four deep, 

 equal, pointed, marginal teeth. Corolla gaping; tube as long 

 as the calyx, cylindrical ; upper lip slightly concave, crenate ; 

 lower lip divided into three deep, unequal, obtuse, cleft or notched 

 segments. Filaments thread-shaped, directed towards the upper 



