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Calyx irregular. 



RED RATTLE, (Pedicularis.) Calyx deeply crenate and 

 jagged ; upper limb of the corolla flattened sideways, 

 arched ; lower one flat, three-lobed ; capsule two-celled. 



** Calyx five cleft. 

 TOAD FLAX, (Linaria.) Corolla personate, spurred ; upper 



lip two-cleft ; lower lip three-cleft, swelled up in the 



middle ; capsule swelled, of two cells, opening by teeth. 

 SNAP-DRAGON, (Antirrhinum.) Corolla as in Toad Flax, but 



not spurred ; capsule of two cells, opening by three pores 



at the end. 

 FIGWORT, (Scrophularia.) Corolla roundish, with two short 



lips, the upper two-lobed, the lower three-lobed, the under 



lobe bent back ; capsule two-celled, two-valved. 

 FOXGLOVE, (Digitalis.) Corolla bell-shaped, four or five- 



lobed, unequal ; capsule ovate, of two cells. 

 VERVAIN, (Verbena.) Corolla tubular, nearly regularly five - 



cleft ; stamens very short, sometimes only two ; seed 



two or four in a very thin capsule. 



** Calyx four cleft. 



BARTSIA, (Bartsia.) Upper lip of the corolla arched, en- 

 tire, lower lip three-cleft, equal, entire, bent back ; cap- 

 sule two-celled, many seeded. 



EYE-BRIGHT, (Euphrasia.) Upper lip of the corolla cleft 

 and notched ; lower lip of three lobes, nearly equal, all 

 notched ; capsule two-celled. 



YELLOW RATTLE, (Rhinanthus.) Calyx puffed out, upper 

 lip of the corolla flattened sideways ; lower lip three - 

 cleft, flat, each lobe entire ; capsule of two cells and two 

 lobes, blunt. 



COW-WHEAT, (Melampyrum.) Upper lip of the corolla flat- 

 tened sideways, and turned back at the edge, lower three- 

 cleft ; capsule two-celled, two-seeded, opening on one side. 



BROOM-RAPE, (Orobanche.) Calyx sometimes of only two 

 leaves, each of these being deeply cleft ; corolla four or 

 five-cleft, irregular ; capsule two-valved, many seeded. 



