296 PROCEEDINGS OF THE AMERICAN ACADEMY 



t'ces incani ; foliis integerrimis parvulis ; floribus in axillis paucis fas- 

 ciculatis vel solitariis ; corolla ut videtur rosea. 



The name, composed of the Greek words for hoary-white, or gray 

 and Mint, is suggested by the silvery canescence. The typical species 

 has been described as a Hedeoma by Dr. Torrey, but with a natural 

 misgiving, on account of the habit, the perfectly regular and equally 

 toothed calyx, and the villosity in the throat of the corolla. This 

 forms, indeed, a definite and nearly if not wholly complete ring, which 

 is a character thought to be of some moment in Labiatse. • I am dis- 

 posed to join with it a species collected by the late Dr. Gregg in North- 

 ern Mexico, which has a much elongated corolla in the manner of Cula- 

 mintha coccinea, and which would technically belong to Keithia except 

 for the obvious rudiments of the upper pair of stamens, and the pilose 

 ring, which is here close to the ba>e of the tube of the corolla. Keithia 

 marifolia, Schauer, in Linnaea, 20, p. 705, from the same region, 

 may probably be added to this genus, at least if no. 1080 of Coulter's 

 Mexican collection is of that species: for in Coulter's plant the rudi- 

 ments of the upper pair of stamens (of which in Aschenborn's plant 

 there is said to be "nidhnn vestigium"} are conspicuous, and even 

 with vestiges of the abortive anther. But no trace of the pilose ring 

 is found. 



Poliomintiia ixcana. Ramis gracilibus cum foliis linearibus 

 (imisve oblongis) planis obtusis pube brevissima creberrima canescenti- 

 bus ; verticillastris paucifloris ; pedicellis brevissimis ; calyce breviter 

 tubuloso 15-nervi villosissimo ; tubo corollas parum exserto, fauce am- 

 pliata intus piloso-annulata. Hedeoma incana Torr. Bot. Mex. Bound, 

 p. 130. — New Mexico, near El Paso, &c, Parry, "Wright, Bigelow, 

 Palmer. — Corolla only twice the length of the calyx. 



Poliomintiia loxgiflora, n. sp. Pube molli laxiori ; foliis 

 ovalibus vel obovatis (cum petiolo brevi lin. 4—6 longis) supra viridu- 

 lis subtus cano-tomenlosis subvenosis ; pedunculis in axillis solitariis 

 brevibus unifloris bibracteolatis ; calyce elongato (subsemipollicari) 

 vix striato 13-nervi ; corolla tubulosa sursum sen-nm paulloque ampli- 

 ata longe exserta extus piloso-pubescente, labiis brevibus, annulo 

 prope basim ; staminibus styloque exserlis. — Nor.thern part of Mexico 

 (station unknown), Dr. Gregg, 1848-1849. — Corolla an inch and a 

 half Ion 2. 



