(seq. 4)

[M]entha.

1. Tenuis Mich{aux}

R[ad]ix, f[ibr?]osa, perennis.

Caulis sub herbaceus, procumbens, assurgensque 1-2 pedalis, tetragonus, glaber, articulatus, ramosus, radicans, atomis glandulosis adspersus.

Folia, opposita, decussata, ovato lanceolata, acuta, acute serrata, venosa, glabriuscula, pilis paucis praecipue venis (x) et atomis glandulosis punctata adspersa. (x)

Petioli, 3-4 linea longi, compressi, glabri.

Flores, in racemis verticillatis, multi-confertifloris, terminalibus, brevibus (1-1½ poll{icaribus}), verticillis approximatis.

Bracteae [loss] ad [loss] in [loss]rticilli singuli, oppositae, majores ovato-lanceolatae, acutae sub incisae, glanduloso-punctatae, duae ad latus utrumque bractearum majorum inaequales lineares.

Pedunculi, 2-3 linea longi, teretes, glabri.

Calyx, monophyllus, tubulosus, sulcatus, glaber, glanduloso-punctatus, persistens, limbo quinquedentato, dentibus subulatis acutis aequalibus, erectis, ciliatis.

Corolla, monopetala infudibuliformis, coerulescens, glanduloso-punctata, tubo calice paulo longiore, limbo sub aequaliter quadrifido, laciniis obtusis sub patentibus, superiore emarginata.

Stamina, filamenta quatuor, brevissima filiformia, inclusa tubo corollae adnata distantia nec approximata. Antherae erectae ovales, sulcatae, albae, per latera dehiscentes.

Pistillum germina quattuor ovalia supera. Stylus filiformis corollâ longior, incurvus summitate, sub inaequaliter bifidus. Stigmata simplicia acuta, revoluti.
Semina, quatuor, parva, ovalia glabra.

Hab{itat} in udis, florens Sept: M. gentili valde affinis