OF ARTS AND SCIENCES: FEBRUARY 13, 1872. 365 



The President communicated the following : — 

 Botanical Contributions by Asa Gray. 



1. Notes on Labiatce. 



At the close of a preceding article (see vol. 8, pp. 294-296) two 

 new genera of Labiatag were described. I now offer additional notes 

 upon one of these genera, and upon some other plants of the order, 

 beinc: such of the results of a recent revision of the North American 

 species as seem worth while to be now recorded. 



Poliomintha, Gray, in Proc. Am. Acad. 8, p. 295. — The two 

 species on which the genus was founded, P. incana and P. longijlora, 

 have corolla intus piloso-annulata ; calycis dentes erecti. A second 

 section has to be added : viz. 



§ 2. Corolla exannulata : calycis dentes nunc patentes. Keitkice 

 affinius sed staminum superiorum filamenta sterilia conspicuoe. 



P. marifolia. Keithia marifolia Schauer, Linmea, 20, p. 705. 

 If Coulter's no. 1080 be rightly here referred, the species is well 

 marked by its roundish-ovate leaves with diverging veins, and its 

 erect calyx-teeth one third to one fourth the length of the tube ; rudi- 

 mentary filaments filiform. The calyx is obscurely bilabiate. 



P. mollis. Tomentoso-incana, basi tantum lignescente ; foliis ova- 

 tis ovalibusque 3 - 5-plinerviis basi in petiolum brevem angustatis ; 

 calycis dentibus subina?qualibus tubo angusto 13-nervi quadruplo bre- 

 vioribus inosqualiter patentibus ; corolla calycem duplo superantibus ; 

 rudimentis staminum superiorum brevibus subulatis. Hedeoma mollis 

 Torr. Mex. Bound, p. 129 (char, vix bona). — S. W. Texas; cliffs on 

 the Rio Grande near Puerte de Paysano, Dr. Bigelow. 



Cunila Mariana L. The genus Cunila, of which this species is 

 the type, ever since its reformation by Bentham more than 30 years 

 ago, has been characterized as diandrous with no vestiges of the supe- 

 rior pair of stamens. Bentham cites the figure in Sweet, Brit. Flower 

 Garden, t. 243, without noticing that it represents, and the letterpress 

 describes, a rather conspicuous capitellate-tipped pair of rudimentary 

 stamens, probably supposing this to be incorrect. It is, however, only 

 an exaggeration ; for, as Professor Buckhout of Pennsylvania Agricul- 

 tural College has shown me, minute rudimentary sterile filaments are 

 uniformly present in our species. If truly absent in the Mexican and 

 Brazilian species, the value of this character as a generic one is re- 



