CATALOGUE. 309 



Science, July, 1848, p. 82, and Die Fai-rnkrauter, ii, p. 57, t. 204. Cheil- 

 anthes dealbata, Pursh. 



From the Upper Missouri {Pursh, Nuttall) and Kansas, where it is rather commoD, "chiefly on the 

 perpendicular faces of dry calcareous rocks, where it is sheltered by overhanging projections" (Hall, 

 Parry), to New Mexico {Mrs. Sumner) and Arizona, Parry, Bothrock. I have also seen specimens said to 

 have come from Texas. The Kansas specimens are very delicate, only 3-4 inches high, and correspond 

 exactly with Kunze's figure, but those gathered in Sanoita Valley, Arizona, by Dr. Rothrock, are much 

 taller (8-9 inches), and have a stout wiry stalk, looking much more like a transition towards N. nivea. 

 They have, however, the frond fully qnadripinnate, and the very minute segments of the present species. 



Notholsena Fendleri, Kunze. 



Rootstock short, thick, chaffy, with ferruginous scales; stalks densely 

 tufted, dark-brown, polished, 3-5 inches long ; rachis and all its branches 

 similar, but flexuous and zigzag ; frond broadly deltoid-ovate, 3-5 inches 

 long, and nearly as broad, 4 — or nearly — 5-pinnate below, gradually simpler 

 above; pinnse alternate; ultimate pinnules oval or elliptical, 1-1^ lines long, 

 simple or 3-lobed; upper surface green, often glandular or dotted with 

 white; under surface white-pulveraceous. — Die Farrnk. ii, p. 87, t. 136. 



Clefts of rocks, Colorado, New Mexico, and Arizona, Fendler, Hall $■ Harlour, Brandegee, Parry, 

 Wolf, Palmer. A larger plant than the last, and easily distinguished from it by the zigzag and usually 

 much entangled branches of the rachis. 



* * * * Frond naked beneath, pinnately compound. 



TVotholsena tenera, Gillies. 



Stalks tufted, brownish, smooth, and shining ; fronds 3-4 inches long 

 [larger in Chilian plants], ovate-pyramidal, 2-3-pinnate, sub-coriaceous; 

 pinnse mostly opposite, distant, the lower ones somewhat triangular; ulti- 

 mate pinnules ovate, often sub-cordate, obtuse, scarcely 1 line long, smooth 

 and naked on both surfaces; texture rather delicate. — Bot. Mag. t. 3055; 

 Kunze, Die Farrnk. i, p. 44, t. 22 ; Hook. Sp. Fil. v, p. 112. 



Crevices of perpendicular rocks. Southern Utah, Dr. Parry, May, 1874„ Like the last two species, 

 this is closely related to N. nivea, the principal difference in this case being in the absence of the white 

 powder. It occurs, also, in Bolivia and in Chile. Specimens with simply pinnate fronds, and larger, 

 roundish pinnules, were collected with the more compound form in Southern Utah by Dr. E. Palmer in 

 1877. 



