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Athyrium cyclosorum Rupr. Data are wanting for the defini- 

 tion of the limits of this species, which usually is confounded 

 with the preceding. It is a mountain fern, and its probable range 

 is from central California northward. 



Phegopteris alpestris Mett. A fern of high altitudes in the 

 northern part of the Sierra Nevada, where it forms dense patches 

 in rocky places. It has been collected at Lassen's Peak, Pyramid 

 Peak, Mt. Shasta, Mt. Stanford, Webber Lake, etc. 



Nephr odium Nevadense Baker. In meadows and wet places, 

 at high altitudes in the Sierra Nevada, from Mariposa, where col- 

 lected by Congdon. to the northern boundary of the State, and 

 thence northward into Oregon. 



Nephr odium patens Desv. This aberrant species has been col- 

 lected several times at Santa Barbara. There is also a specimen 

 in the herbarium of the California Academy of Sciences collected 

 at Miraflores, Lower California. It is unknown otherwise on the 

 Pacific coast. 



Nephr odium Pilix-Mas Rich. Male fern. Known in this 

 State by a single collection made in 1882, by Parish, in deep crev- 

 ices of a cliff at Holcomb Valley, alt., 8,000 feet., in the San Ber- 

 nardino Mts. 



Nephrodium rigidum argutum Davenp. This is a common 

 species on stony and partially shaded slopes, from San Diego to 

 the northern boundary of the State, and thence to British Co- 

 lumbia. In the south its range of altitude is from 500 to 5,000 

 feet. 



Nephrodium spinulosum dilatatum Baker. The only record for 

 this fern in California is a collection made by J. Burtt Davy, in 

 1803, in the woods of the Coast Range near Olema, Marin county. 



Polystichum munitum Presl. Common on stony slopes from 

 San Diego county to the northern boundary of the State, and 

 thence northward to Alaska. In the southern mountains its alti- 

 tudinal range is from 2,000 to 5,000 feet. The var. imbricans 

 Maxon has been collected at several stations from Plumas to 

 Trinity county. The var. inciso-serratum Underw. was collected 

 in Santa Cruz county by Jones, and in Marin county by Palmer. 



Polystichum lonchitis Roth. Holey fern. Underwood reports 

 this fern as collected at Castle Lake in Siskiyon county, by 

 Pringle, which seems to be the only record of its presence in the 

 State, 



