22 POLYPODIACEAE (FERN FAMILY) 



1. Woodsia scopulina D. C. Eat. Can. Nat. 2: 90. 1865. Fronds 1-2 dm. 

 ;.uberulent beneath with minute jointed hairs and stalked glands, oblong- 

 niil erenulate: indnsia deeply cleft into narrow segments terminating in 

 jointed hairs. In <len>e masses on rocks and in crevices; Minnesota to Cali- 

 fornia, south in the mountains to Colorado. 



J. Woodsia oregana 1). C. Eat. 1. c. Very similar, but with smooth fronds, 

 the fertile taller than the sterile: the indusium reduced to a few moniliform 

 hairs. From Arizona and Colorado to British Columbia and Lake Superior. 



13. ASPLENIUM L. SPLEENWORT 



Plants very variable in size, with simple pinnate, 2-3-pinnate, or pinnatifid 



. Sori oblong or linear, borne on veins more or less oblique to the 



rachis or the midrib, not confluent. Indusium straight or sometimes 



curved, opening toward the midrib when single (sometimes double). Veins 



free. 



Fronds simply pinnate. 



Pinnae 12-30 pairs, oval, ovate, or rhomboidal, obtuse. 



Kachis purple-brown 1. A. trichomanes. 



Rachis green . . , . . . . . . . 2. A. viride. 



Pinnae only 2-5, linear-cuneate . . . . . . . 3. A. septentrionale. 



Fronds 2-3-pinnate or pinnatifid. 



Fronds 3-10 cm. long, ternate and bipinnate . . . . 4. A. Andrewsii. 



Fronds 2-4 dm. long, bipinnate 5. A. Filix-femina. 



1. Asplenium trichomanes L. Sp. PL 1080. 1753. Fronds 1-2 dm. long, 

 narrow, simply pinnate, with 15-30 pairs of subsessile, roundish-oval, or oval- 

 oblong pinnae; these obtusely cuneate or truncate at base, entire or erenu- 

 late, rarely slightly incised, falling separately from the persistent rachis: stipes 

 purple-brown, shining. Colorado, Wyoming, and across the continent. 



2. Asplenium viride Huds. Fl. Angl. 385. 1762. Stipes densely tufted, 

 5-10 cm. long, naked, the lower part chestnut-brown, merging into the green 

 of the rachis: fronds narrow, 5-15 cm. long, with 12-20 pairs of ovate or 

 rhomboidal pinnae; these obliquely truncate at base and crenate on the outer 

 edge: rachis naked: sori numerous. Idaho, northern Wyoming, ano! across 

 the continent. 



3. Asplenium septentrionale (L.) Hoffm. Deutsch. Fl. 2: 12. 1795. Stipes 

 densely tufted, 8-15 cm. long, slender, naked, ebeneous toward the base: 

 fronds irregularly forking, consisting of 2-5 narrowly linear-cuneate rather 

 rigid segments, which are entire or sometimes cleft at the ends into a few 

 narrow teeth: sori elongated, placed near the margin, usually facing each other 

 in pairs, commonly only 2 or 3 to each segment. Acrapteris septentrionale 



nk. In clefts in exposed rocks; southern Wyoming to New Mexico and 

 Ari/ona. 



1. Asplenium Andrewsii A. Nels. Proc. Biol. Soc. Wash. 17: 174. 1904. 

 ok enveloped in matted roots: stipes few to several, ebeneous below, 

 / into the green of the rachis: frond thin-herbaceous, deltoid-ovate, often 

 ternate; pinnae lanceolate, tapering gradually into the pinnatifid tip; pinnules 

 late, sharply incised and somewhat incisely serrate: sori short but 

 connecting with those in the successive lobes, forming nearly a contin- 

 uous sorus from the base to the apex of the pinnule: indusium straight, finally 

 forced hack and concealed by the sporangia. Type locality, sandstone cliff, 

 Boulder Canon, Colorado. 



>. Asplenium Filix-femina (L.) Bernh. Schrad. Neues Journ. Bot. 1 : 26. 



Frond* :; s dm. long: delicate and softly membranaceous, oblong- 



".-pinnate; pinnules adnate to the secondary rachis, ovate to 



'<ll.me.ol itr. variously toothed or incised: indusia more or less curved, 



often ero.v-1'rij.r tin- fertile veinlet and continued a short distance down the 



otl " <r BOe >f it, Hate. LADY FERN. Widely distributed; not rare 



in 01, 



