66 U 



4. Lamina lanceolate (basal pinnæ shorter). 



5. Sori not close to the secondary veins; stipe reddish; seg- 

 ments unequal-sided, more deeply cut on the anterior side. 



Underside paler I.D. indecora (Liebni.) C. Chr. 



5. Sori in two rows close to the secondary vein; stipe stramine- 

 ous; segments equal-sided, deeply cut on both sides. Both 



surfaces concolorous 6. I), cinnamomea (Cav.) C. Chr. 



3. Large species. Lamina often 50 cm. or more long, pinnæ 10 — 25 cm. 



4. Indusium persistent 8. D.patula (Sw.) Und. 



4. Indusium absent 9. D. ulvensis, Hieron. 



2. Indusium very large, coriaceous, hemispherical, perfectly concealing 

 the sporangia. 



3. Surfaces not mealy-glandular. Leaf with age coriaceous, the seg- 

 ments broad ,....' 10. D. Ma.roni, Und. et C. Chr. 



3. Both surfaces densely mealy-glandular. Leaf thinner, finely cut. 



11. L>. Karwinskyana (Mett.) O. Klze. 



1. Dryopteris Saffordii C. Chr. Amer. Fern Journal 1: 94, 1911. 



Type from Peru, mountains back of Lima, Arroyo Railway, leg. William 

 E. Safford i"/i892, nr. 994 (W). 



Endryopteris rhizomate ignoto. Stipitibus brevibus, 7— 8 cm. longis, stramineis, 

 squamis ovalis, pallide-luteis, tenuibus sparse instructis. Lamina lanceolata, 30 cm. 

 longa, medio 10 cm. lata, versus basin attenuata, papyracea vel coriacea, infra 

 pallida, bipinnatifida, rachi straminea superne sulcata minute glandulosa et sparse 

 squamosa. Pinnis oppositis, sessilibus, atlenuatis, acutis, niediis 5 cm. longis, 1 — I'/a 

 cm. latis, inferioribus sensini reductis, magis remotis, infimis 2 cm. longis, utrinque 

 minute glandulosis, ad alam 1 mm latam pinnatifidis. Laciniis obliquis, triangular- 

 ibus, acutis, leviter serratis, basali acroscopica longiore et latiore, subpinnalifida. 

 Venis inimersis, indistinctis, saepe furcatis, 3—4 jugis. Soris majusculis, medial- 

 ibus; indusiis reniformibus, persistentibus, rufis, minute glandulosis. 



A near relative of D. filix mas, different by the less cut lamina, which is nearly 

 coriaceous and densely viscid throughout by minute, glossy glands. 



2. Dryopteris filix mas (L.) Schott. 



Our common European Male Fern is widely distributed in North America, 

 from New Foundland to Greenland and Alaska, south to Michigan and South Da- 

 kota and along the Rocky Mountains and the Pacific coast to Arizona and Mexico. 

 It varies in North America quite as much as in Europe, and some of the European 

 forms are also to be found in America. I shall not here try to name and describe 

 the different forms, but only mention that some of the forms of the Rocky Mis. 

 dilïer not a little from the type. Thus a peculiarly looking variety is found in 

 Washington (Suksi)Orf nr. 1230, W) and a large-growing tripinnalifid variety, which 



