Page:Parsons How to Know the Ferns 7th ed.djvu/74



Very common, usually but not always large, fronds oblong-ovate, 2–3 pinnate, lowest pinnæ unequally triangular-ovate, lobes of pinnæ thorny-toothed. In woods everywhere. P. 166.

From one and a half to more than three feet high. Sterile fronds smaller and simpler than the fertile, nearly or quite twice-pinnate, the lowest pinnæ triangular-ovate, upper longer and narrower, pinnules oblong-ovate, sharply thorny-toothed. In moist woods. P. 168.

Usually rather large, fronds linear-oblong or lanceolate, once pinnate with pinnatifid pinnæ, linear-oblong, fruit-dots between midvein and margin. In swamps. P. 170.

In every way larger than preceding species, fronds usually twice-pinnate, pinnæ broadest at base, fruit-dots near the midvein. In swampy woods. P. 172.

Large, fronds broadly ovate or the fertile ovate-oblong, once-pinnate with pinnatifid pinnæ, pinnæ broadest in the middle, fruit-dots very near the midvein. In rich woods. P. 175.