— 275 — 



Hab. Gallia austro-orient., Drôme, in aquaticis circa 

 Chabeuil (Gdgr.). 



71. Mentha rotundifoliaXarvensis Wirtg. — Exs., Billot, 

 № 3749! 



Caule ascendente, basi ramoso, ramis elongatis, villo- 

 sis, patulo-erectis, foliis late ovato-ellipticis, acutiusculis, 

 basi rotundatis, breviter petiolatis, undique copiose hir- 

 sutis, pallide viridibus; serraturis aeque ovato-obtusis, 

 rectis; glomerulis remotis, parvis, valde compactis, folio- 

 sis, calycis lanati segmentis sub indumento perspicuis; 

 pedicellis glabris; corolla rosea; staminibus inclusis. 



Hab. Germania occident, ad Neuwied prope Göblentz 

 (Ph. Wirtgen) specimina Billotiana, caeterum iis a CI. 

 Wirtgen acceptis, simillima, hue descripsi. 



72. Mentha leptoclada Gdgr. 



Gaule tenui, gracili, diffuso vel procumbente, ramoso, 

 rubro villoso; foliis parvis, ellipticis, utrimque attenuatis, 

 acuminatis, uudique pubescentibus, longe petiolatis; ser- 

 raturis parvis, ovato-cuspidatis, rectis, inaequalibus, bre- 

 vissimis; glomerulis parvis, densiusculis; calyce hirto, 

 violaceo, pedicellis subhirtellis; corolla rosea, staminibus 

 inclusis; nuculis bruneis, ellipticis. 



Hab. Gallia orient., Ain., circa stagna ad Le Flan- 

 tay (Gdgr.). ■ 



73. Mentha iseriensis Gdgr.— Exs., Billot, № 1294 bis! 



Gaule recto, rigido, paulo ramoso, ramis patulis, sub- 

 glabris; foliis obovato-oblongis, utrinque acuminatis angu- 

 statis (9 — 12 mill, latis), subglaberrimis, undique minute 

 adsperseque hirtellis, longe petiolatis; serraturis parvis, 



