178 DIDYNAMIA. 



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

 short, reflexed. 



11. Ballota. Cal. with 10 ribs and 5 teeth. Upper lip of the 

 Cor. concave, notched; lower one trifid; middlelobe the largest, 

 emarginute. 



12. Marrubium. Cal. \vith 10 ribs and 5 or 10 spreading 

 teeth. Upper//'/) 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 frnit; up- 

 per lip with a vaulted process. 



16. Thymus. Cal. closed witli hairs at the mouth. Cor. shortly 

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

 emarginate. 



IS. Prunella. Upper lip of the Cal. with 3 very short teeth. 

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

 tlier. Stigma bifid. 



15. Origanum. Calyces collected, by imbricated Iracteas, 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 Up of the Cor. erect, 

 emarginate; lower one the largest, emarginate. 



2. ANGIOSPERMIA. 



■* Calyx -\-Ji<l. 

 23. Lathr.t.a. Cor. tubular, 2-lipped. A depressed gland at 

 the base of the suture of the germen. Caps, l-celled. 



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

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

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

 cells and many angular seeds. 



21. Rhinanthus. Co/, inflated, 4-toothed. Upper /fp of the 

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

 obtuse, compressed, and with many imbricated plane seeds. 



22. Melampyrum. Upper lip 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 lip 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. 



