294 DIANDRIA MONOGYNIA. 



HAB. Overflowed places. July Sept. <v). Stem assurgent ; pedunc 

 alternate and opposite, spreading ; cor. pale purple. 



L. attenuata : leaves lanceolate and obovate, narrowed at the hase ; 

 peduncles shorter than the leaves, erect. 



HAB. Overflowed places. July Sept. <2>. Stem erect or procumb. ; 

 leaves serrate or dentate ; cor. pale purple. 



8. UTRICULARIA. Bladder-wort. 



U. vulgaris : floating ; stems submerged, dichotomous ; leaves many- 

 parted, vesiculose ; scape 5 9-flowered ; upper lip of the corolla en- 

 tire, broad ovate ; spur conical, incurved. 



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. 7J.. Roots dichot., with few utric. ; scape 2 3 

 in. ; lips of the corol. roundish. 



U. cornuta : scape rooting, erect, rigid ; flowers 2 3, subsessile ; in- 

 ferior lip of the corolla very wide, 3-lobed ; spur very acute, por- 

 rected. 



HAB. In wet places. Aug. Sep. 1|_. Scape 1 ft., rooting in the 

 mud, bracteolate ; Jlower approx. large ; palate very promi- 

 nent. 



9. LYCOPUS. Water Horehound; 



L. europeus b. angustifolius : smooth ; stem acutely quadrangular ; 

 leaves narrow-lanceolate, with large acute teeth ; lower ones some- 

 what pinnatifid ; segments of the calyx acuminate, terminating in 

 short spines. 



HAB. Wet meadows and ditches. Aug. . Root creeping ; stem 1 

 2 ft. much branched ; leaves puncticul. ; Jl. vertir.ill. crowded, 

 white. 



L. virginicus : leaves broad-lanceolate, serrate, narrow and entire at 

 the base ; calyx shorter than the seed, spineless. 



HAB. Shady, wet places. Aug. %. Stem 1 1^ ft. ; nearly simple, 

 with obtuse angles ; leaves coarsely serrate, purplish beneath. 



10. HEDEOMA. Wild Pennyroyal. 



H. pulegioides : leaves oblong, remotely serrate ; peduncles axillary, 



numerous. 

 HAB. Dry hills and woods. July Aug. . Plant aromatic ; fl, 



subverticillate, pale blue. 



11. MONARDA. 



M. didyma: leaves ovate, acuminate, subcordate, somewhat hairy; 

 flowers in simple or proliferous heads ; exterior bracts large, colored, 

 lanceolate. 



HAB. River banks. July Aug. 1\.. Stem quadrang., somewhat pu- 

 bescent ; Jlower 8 large, scarlet. 



b. angustifolia : leaves ovate-lanceolate, acuminate, and with the 

 stem, pubescent. 



HAB. Boggy woods. July. %.. Stem more slender ; heads rarely pro- 

 liferous ; leaves attenuate at the base. 



M. hirsuta : whole plant very hairy ; flowers small, verticillate ; 

 bracts attenuated into awns; upper teeth of the calyx very short, the 



