DIANDRIA.— MONOGYNIA. 21 



HAB. Swamps and ditches. Aug. 7f. Stems decumbent; 



lower lip of the corol. obovate. 

 4. U. setacea : scape filiform rooting, 2 — 3-flowered ; 



upper lip of the corolla ovate ; lower distinctly 3- 



lobed ; spur sub-conical, shorter than the lower lip. 

 HAB. Overflowed swamps. June. If. Scap. 4—6 pi., 



rooting in the mud; flowers mostly two, very small ; 



spur rather obtuse, 

 o. U. gibba: floating; scape generally 2-flowered ; spur 



shorter than the lower lip of the corolla, obtuse, 



gibbous in the middle. 

 HAB. In ponds. July. If. Roots dichot., with few 



utric. ; scape 2 — 3 in. ; lips of the corol. roundish. 

 Q, U. cornuta : scape rooting, erect, rigid ; flowers 2 — 3. 



subsessile ; inferior lip of the corolla very wide, 3- 



lobed ; spur very acute, porrected. 

 HAB. On wet calcareous rocks. Aug. — Sept. If. Scape 



1 ft., rooting in the mud, bracteolate ; fl. approx. 



large ; palate very prominent. 

 7. U. striata : floating ; scape 2 — 3-flowered ; upper lip 



of the corolla ovate-round, sub-emarginate, waved 



on the margin ; lower lip 3-lobed, reflexed at the 



sides ; spur straight, obtuse, shorter than the lower 



lip. 

 HAB. In swamps. June. If.. Stems with few submerged 



branches; cor. yellow, much expanded, striate with 



red. 



. purpurea : scapes axillary, generally 1 -flowered : 



involucrum 0; lower lip of the corolla 3-lobed: 



lateral lobes cucullate on the under side ; spur com- 

 pressed, half as long as the corolla. 

 HAB. Ponds on mountains. Aug. If. Stems very long ; 



scapes often by pairs ; corolla purple ! 



1G. LYCOPUS. Water Horehound. Labiates. 



I. L. europeus /3. august if alius : smooth; stem acutely 

 quadrangular ; leaves narrow-lanceolate, with large 

 acute teeth ; lower ones somewhat pinnatifid ; seg- 

 ments of the calyx acuminate, terminating in short 

 spines, 

 HAB. Wet meadows and ditches. Aug. ©. Root crop 

 ing ; stem 1 — 2/*., much branched ; leav. puncticul. ; 

 fl. verticill. crowded, white. 



: L. virifinicus : leaves broad-lanceolate, serrate. 



