1865.] EATON — GENUS WOODSIA. 91 



U. S. A., 1855, (referred to W. hyperborea in Hooker's British 

 Ferns). Rocky Mountains, near 40° north latitude; Hall and 

 Harbour, No. 690a. 



Fronds quite smooth, 2-8 inches high, 8-12 lines wide, the fer- 

 tile ones much taller than the sterile, pinnate ; | innae 9-13 pairs, 

 the lower ones smaller, triangular and rather remote, the upper 

 ones more crowded and larger, pinnately lobed into 3-6 divisions 

 on each side, the divisions more or less toothed ; the teeth irregu- 

 lar, rather acute, at first reflexed (at least in the dried specimens), 

 but as the sporangia ripen, the frond becomes more coriaceous and 

 at length explanate. The involucre is exceedingly minute, and 

 consists of a few articulated ciliae composed of a single series of 

 nearly globular cells. In general appearance this little fern re- 

 sembles small forms of W. obtusa, from which however the gla- 

 brous fronds and the rudimentary involucre at once distinguish it. 



4. Woodsia scopulina, sp. ?wv. : ctespitosaglanduloso-pubes- 

 cens ; stipite inarticulate) frondibus breviore basi paleaceo, frondi- 

 bus erectis elongato-lanceolatis acumin itis pinnatis fere bipinnatis 

 subtus secus venas paleolis unicae cellularum seriei minute pubes- 

 centibus glandulisque fuscis conspersis ; pinnis plerumque oppositis 

 oblongo-lanceolatis sub-acutis fere ad costam pinnatifidis, pinnulis 

 crebris oblongis obtusis crenatis vel crenato-lobatis; lobulis sori- 

 feris ; involucro tenerrimo vix conspicuo profunde laciniato ; laciniis 

 in cilias breves articulatas angustatis. 



Hab. — Rocky Mountains, near 40° north latitude; Parry No. 

 394, Hall and Harbour No. 690b. Columbia River ; Brackenridge, 

 (ir. Ihensls.) U. S. Expl. Exped. Fraser's River, near 49° 

 north latitude ; Mrs. John Miles. 



A graceful species, quite distinct from all others. Stipes, as in 

 the last straw-color above, chestnut-brown at the base, where it is 

 chaffy with ovate acuminate brown scales. Fronds, several from 

 the caudex, 4-10 inches high, 12-1,8 lines wide; finely pubescent 

 everywhere along the rachis, costa, and veins, except on the upper 

 surface, with slender flattened hairs, and sprinkled beneath with 

 very minute, often compound glands ; apparently bipinnate, but the 

 costa of the primary pinnae is narrowly winged. Pinnae 12-20 

 pairs, oblong lanceolate or somewhat triangular in outline. Pinnules 

 6-10 pairs, ovate-oblong, crenately lobed, the teeth rather obtuse, 

 not reflexed when young. The involucre is more evident than in 

 the last, and consists of a central portion deeply and irregularly 

 cleft into laciniae, which are narrowed into rather short articulated 



