44G Rydberg : Rocky Mountain flora 



A. integrifolia ? Torr. loc. cit. is so imperfect that we can not very 

 confidently refer it to the present species; but it certainly is not 

 the same with the foregoing" [A. Torreyana}. 



When preparing the manuscript of the Flora of Colorado, 

 I overlooked the publication of Tetraneuris epunctata A. Nels. 

 Otherwise I should not have proposed T. glabriuscula to replace 

 •the untenable T. glabra Greene. I am perfectly willing to reduce 

 the last two to synonymy. This is, however, not the case with 

 T. angustifolia. In the key Professor Nelson has a division, 

 "Crowns of the caudex short" in contrast to "Crowns of the 

 caudex fastigiate and elongated, 1-2 dm. high." Under the first 

 division he includes Actinella linearis. If he had given A. an- 

 gustifolia instead it would have been correct. The type of Ac- 

 tinella scaposa linearis was collected by Riddell in Texas and is 

 preserved in the Torrey herbarium. It has elongated branches 

 of the caudex as have Tetraneuris fasti giata and T. stenophylla, 

 and differs from them mainly in the fact that the bases of the 

 leaves are scarcely dilated. I think that Tetraneuris fasti giata 

 and T. stenophylla also are distinct. This is only a matter of 

 difference in opinion as to limitation of species. If they are to be 

 united, they should be included in T. linearis, which is just as 

 closely related. Tetraneuris angustifolia on the contrary is more 

 distinct and related to T. Torreyana, but lacks the hair-tufts at 

 the bases of the leaves. 



Tetraneuris mancosensis A. Nels. is a synonym of Actinella 

 leptoclada A. Gray. I am now inclined to regard T. inter- 

 media Greene also as such, although I kept it distinct in the 

 Flora of Colorado. But I think it goes too far in "lumping," 

 if one tries to include the acaulescent Tetraneuris Crandallii, 

 T. arizonica, and T. pilosa in the leafy-stemmed T. leptoclada. 

 Besides the difference in habit the acaulescent species have abruptly 

 aristate pappus-scales, while in T. leptoclada the scales taper 

 gradually into the bristle-point. Tetraneuris Crandallii in habit 

 closely resembles T. Torreyana, but the scape in not villous and 

 the pappus is different. T. arizonica, in which I am inclined to 

 include T. pilosa, resembles T. epunctata, but the leaves are more 

 hairy, more punctate, and have conspicuous hair-tufts at the bases. 



It seems as if enough species have been proposed in this genus, 



