178 DIDYNAMIA. 



lobed, its middle lobe the largest, crenate ; lateral ones very 

 short, reflexed. 



11. BALLOTA. Cat. with 10 ribs and 5 teeth. Upper Up of the 

 Cor. concave, notched; lower one trifid; middle lobe the largest, 

 emarginate. 



12. MARRUBIUM. Cat. with 10 ribs and 5 or 10 spreading 

 teeth. Upper Up of the Cor. cloven, linear, straight; lower 

 one trifid ; middle segment the largest, emarginate. 



*"* Calyx two-lipped. 



17. SCUTELLARIA. Lips of the Cal. closing over the fruit; up- 

 per lip with a vaulted process. 



16. THYMUS. Cal. closed with hairs at the mouth. Cor. shortly 

 2-lipped ; upper one notched ; the lower one the largest, sub- 

 emarginate. 



18. PRUNELLA. Upper lip of -the Cal. with 3 very short teeth. 

 Filaments forked at the extremity, one point bearing the An- 

 ther. Stigma bifid. 



15. ORIGANUM. Calyces collected, by imbricated Iracleas, into 

 a spicate, quadrangular cone. Upper Up of the Cor. straight, 

 notched ; the lower one in 3 nearly equal lobes. 



14. CLINOPODIUM. Involucre (bracteas) of many linear-acumi- 

 nated leaflets placed under the cal. Upper lip of the Cor. erect, 

 emarginate ; lower one the largest, emarginate. 



2. ANGIOSPERMIA. 



* Calyx 4-Jid. 



23. LATHR^EA. Cor. tubular, 2-lipped. A depressed gland at 

 the base of the suture of the germen. Caps. 1 -celled. 



19. BARTSIA. Cal. mostly coloured. Cor. ringent, with a con- 

 tracted orifice ; upper Up concave, longer, entire ; lower one 

 in 3 equal reflexed lobes. Caps, ovate, compressed, with 2 

 cells and many angular seeds. 



21. RHINANTHUS. Cal. inflated, 4-toothed. Upper Up of the 

 Cor. compressed ; lower one plane, 3-lobed. Caps, of 2 cells, 

 obtuse, compressed, and with many imbricated plane seeds. 



22. MELAMPYRUM. Upper Up of the Cor. compressed, turned 

 back at the margin ; lower lip trifid. Caps, oblong, 2-celled, 

 oblique, opening on one side. Cells 1 -seeded. Seeds gibbous 

 at the base. 



20. EUPHRASIA. Cal. tubular, 4-toothed. Upper Up of the 

 Cor. divided ; lower one of 3 notched lobes. Anthers with 

 thin lobes mucronated at the base. Caps, ovato-oblong, 2- 

 celled. Seeds striated. 



** Calyx 5 -cleft. 

 30. LIMOSELLA. Cor. shortly campanulate, 5 -cleft, equal. 

 Caps, semibilocular, 2-valved. 



