118 American Fern Journal 



to an acuminate apex with the upper basal segment 

 usually auriculate; all segments terminating in one or 

 more acuminate bristle-like tips; sori 1-8 on each seg- 

 ment, large, 1-2 mm. in diameter when fully mature, 

 strongly confluent. 



Type sheet No. 83121 in the Herbarium of the Cana- 

 dian Geological Survey, Co-type collected at the same 

 time and place sheet No. 2376 in my herbarium. Type 

 locality, Elk River, Strathcona Park, Vancouver Island, 

 British Columbia. 



P. lonchitis, P. acroxtichoides, and P. munitum are 

 simply pinnate while the new Polystichum has its pinnae 

 pinnnatifid the entire length of the frond. This char- 

 acteristic, as well as its size, will also separate it from 

 P. scopulinum and P. calif or nkum whose " pinnae are 

 partly pinnatifid below." 



P. aculeatum and P. Braunii have large fronds and 

 are fully bipinnate. 



P. Lemnwri, the most closely related species, has 

 the ".pinnae closely placed, ovate, rounded at the ends, 

 made up of 8-10 pairs of pinnules or divisions, beside 

 the terminal one, obtuse, not armed, sori one or two to 

 each pinnule" whereas in the new species the pinnae are 

 not so closely placed, are not rounded at the ends, have 

 20-30 pinnules or divisions which are not obtuse, and 

 which are fully armed with bristle like points, and 

 which have 1-8 large confluent sori on each pinnule. 



Kent State Normal School, 

 Kent, Ohio. 



Notes on Nomenclature. 



WILLARD 'N. CLTJTE. 



In the current number of Thk American Fern Jour- 

 nal, (page 75), I note a proposed new combination of 

 Selaginella densa as Selaginella rupestris dens a, and 



