176 UNIVERSITY OF COLORADO STUDIES 



PTERIDOPHYTA 



Isoetacea (i species) 



Isoeles brevijolius Lx. is described but not figured. It is said to resemble 

 /. braunii Heer.' 



Filices (2 species) 



Two ferns have been found; Sphenopteris guyottii Lx., which is common, 

 and Adiantiles gracillimus Lx. The Sphenopteris has the aspect of Asplenium 

 filix-foemina (L.) Bernh. Asplenium crossii Knowlton, has been listed from Flor- 

 issant in error. 



There have also been described a doubtful Chara; two supposed species of 

 Salvinia, one considered wholly doubtful, the other referred by Hollick to Tmes- 

 ipteris; three problematical mosses, ascribed to Hypnum and Fontinalis; and 

 some flowers, fruits, etc., of uncertain relationships. 



EXPLANATION OF PLATE 



The plants figured were all collected by Judge Junius Henderson and Professor 

 Francis Ramaley, and are in the University of Colorado Museum. Descriptions 

 of the new species are included in a paper in Bull. Torrey Botanical Club, 1906. 



(i) Quercus ramaleyi, n. sp., a species of oak closely allied to Q. fendleri, still 

 living in New Mexico, of which a leaf is also shown. The leaf of Q. jendleri is 

 from Las Vegas Hot Springs, N. M., alt. 7,000 ft. 



(2) Carpinus jraterna Lx., a species of hornbeam, very closely allied to C. 

 caroliniana, living today from Nova Scotia to Texas, in moist localities. The leaf 

 shown is very much more elongate than Lesquereux's type, but the living species 

 varies in a similar manner. 



(3) Amelanchier scudderi, n. sp., a june-berry or service berry, allied to A. 

 alni folia, living today over a great part of North America. The leaf also resem- 

 bles the genus Malus (apple), and it is impossible to be absolutely sure that it does 

 not belong there, in the absence of other parts; but it is so like A. alnijolia that 

 it is almost certainly a close relative. 



(4) Rhus coriarioides Lx., a sumac scarcely differing from the common living 

 R. hirta. 



(5) Malvastrum exhumatum, n. sp., a star-mallow closely allied to a species 

 found today in New Mexico. 



(6) Carduus florissantensis, n. sp., a thistle which greatly resembles the scarlet 

 oak, Quercus coccinea, but is distinguished by the venation. It is perhaps some- 

 what allied to the living C. ochrocentrus of Colorado, but that has the leaf-surface 

 much more reduced, and the prickles much more developed, as might be expected 

 from the present much greater aridity of the climate. 



(7) Myrica (or Morella) hendersoni, n. sp., a wax-myrtle closely allied to the 

 living M. cerifera, which occurs in damp places from Maryland to Texas. 



« /. hratmii Durieu, 1864, is later, and should be renamed. 



