Ferns oF New Mexico 77 
36. AZOLLA CAROLINIANA Willd. Obtained on Ani- 
mas Creek in the Black Range by Mr. O. B. Metcalfe 
(No. 1110) in 1904. Probably it will be found in other 
localities if searched for carefully. 
37. EQUISETUM ARVENSE L. Chama, Brazos Canyon, 
Taos Mountains, Upper Pecos River, Zuni Mountains, 
and Mogollon Mountains. Often very abundant along 
‘streams in the higher mountains. 
EquIsEeTUM LAEVvIGATUM A. Br. Common in 
most of the higher mountains, along streams and in 
the ‘“‘ciénagas” or marshes. It has been collected also 
in the Mesilla Valley, at an altitude of 3800 feet, and 
near Albuquerque. 
39. EguisrTUM HYEMALE L. Gallinas River near 
Las Vegas (Cockerell), Reserve (Wooton), along the Rio 
Grande near Mesilla (Standley), Gilmores Ranch in 
the White Mountains (Wooton and Standley). Sometimes 
growing along banks of irrigating ditches. Our material 
belongs to the form described as EB. hyemale intermedium 
by Mr. A. A. Eaton. 
40. Eovisetum rospustum A. Br. Mogollon Moun- 
tains (Rusby 416) and along ditch banks near Mesilla 
(Wooton 38). 
41. SELAGINELLA RUPINCOLA Underw. San _ Luis 
Mountains, Dog Spring, Guadalupe Pass, and Organ 
Mountains. The type was collected in the Organ 
Mountains by Wooton (No. 124) in 1897. It is abundant 
in the range, forming large mats on granitic ledges. 
42, SELAGINELLA DENSA Underw. On the Upper 
Pecos near Winsor’s Ranch (Standley 4153), and on Hills- 
boro Peak of the Black Range (Metcalfe 1172). This 
was found in only one locality on the Upper Pecos, 
growing on an exposed ledge at an altitude of about 
8300 feet. 
43. SELAGINELLA Wricntm Hieron. Collected at 
Las yee: Hee in 1895) and at Lakewood (Wooton 
