131 
453, 454—Cheilanthes tomentosa, Link., var. Eatoni, Davert- 
port, 453 being nearest to the species, which was also collected 
but not numbered. Lay 
445—Chetlanthes Wrightit, Hook. 
457—Chetlanthes viscosa, Kaulf. 
465— Gymnogramme Ehrenbergiana, Klotz. (G. hispida, Mett.) 
466—LNVotholena Aschenborniana, Klotz. 
462—WNotholena ferruginea, Hook. 
463—WNotholena Grayi, Davenport. 
Notholena Hookeri, D. C. Eaton. (No number.) 
451—Wotholena nivea, Desv. 
464-—Notholena sinuata, Kaulf. 
All variously distributed about the limestone ledges, cool 
slopes and shaded cliffs on the rocky hills near Chihuahua; 
March to October. 
452—Notholeaa cretacea, Liebmann; (N. Californica, D.C. 
Eaton; WV. candida, Hk., var. cretacta, Davenport.) 
The very fine series of forms of Notholena candida, Hook, 
from Texas, recently collected by Reverchon, have quite con- 
vinced me that this fern, which has heretofore been referred to 
that species, should be recognized as distinct. That it is Lieb- 
mann’s plant I cannot doubt. Mr. Baker assures me that it 
agrees perfectly with Liebmann’s type in the Kew Herbarium, 
and an examination of a pinna from a Kew specimen sent to me 
by him, satisfies me that such is the case. It moreover agrees 
with Liebmann’s original description* quite as well as most 
* I am indebted to the kindness of Mr. Sereno Watson for looking up for me the 
following description :— 
“* Notochlena cretacea, Liebm.: fronde coriacea 6 9 poll. Jonga, lamina 1}-2 
Pollices longa, 1% poll. lata, stipite 5 7 pollicari, subrhomboidea parum acuminata 
obtusa bipinnato-pinnatifida, sursum decrescente pinnato-pinnatifida, demum _pin- 
natifida, pinnis patulis oppositis sessilibus adnatis, infimis basin versus pinnato pinnati- 
fidis sursum pinnatifidis, incequilateris, latere exteriori imprimis basin versus superius 
‘superante, deltoideis, pollicem longis et latis, pinnulis lanceolatis obtusis alternis, la- 
Ciniis suboppositis oblique ovatis obtusissimis decurrentibus, sinubus acutis curvatis ; 
pinnis mediis lanceolatis ceterum similibus ; pagina anteriori viridi globulis cretaceis 
adspersa, posteriori strato denso cretaceo flavido-albo obducta ; rhaci costisque antice 
leviter canaliculatis pulverulentis, postice convexis nigris; sporangiis majusculis mar- 
ginalibus fuscis, sporis sphericis nigris; stipite tereti nigerrimo nitido basin versus 
hic illic squamis membranaceis lanceolatis brunneis instructo. : 
Rhizoma subterraneum obliqvum breve caespitosum squamis rigidis lanceolatis 
margine membranaceo lacero adpressis obsitum. 
