. Our native ferns and how to study them; with synoptical descriptions of the North American species. Ferns. too Our Native Ferns. * Vernation wholly straight. I. B. simplex, Hitch. Plant 2'—7' high, fleshy. sterile segment stalked, very nearly approximate to the rhizoma, or even above the middle, ovate, obovate, or oblong, entire, incised, or pinnately parted into i —3 pairs of roundish or semi-lunate lobes; fertile spike long-stalked, simple or i—2 pinnate ; spores the largest of the genus, closely covered with small points ; bud smooth; apex o' both sterile and fertile segments erect. (Fig.
. Our native ferns and how to study them; with synoptical descriptions of the North American species. Ferns. too Our Native Ferns. * Vernation wholly straight. I. B. simplex, Hitch. Plant 2'—7' high, fleshy. sterile segment stalked, very nearly approximate to the rhizoma, or even above the middle, ovate, obovate, or oblong, entire, incised, or pinnately parted into i —3 pairs of roundish or semi-lunate lobes; fertile spike long-stalked, simple or i—2 pinnate ; spores the largest of the genus, closely covered with small points ; bud smooth; apex o' both sterile and fertile segments erect. (Fig. 29.) Specimens with the sterile segment composed of *^s- 29. Verna- two or three pinnately incised divisions form the jj"^." Z *"Tft var. compositum, Lasch. N. Eng., N. Y. and north- Davenport.) ward, the variety in Wy. T. and Cal. II. ** Vernation partly inclined in one or both portions. \Buds smooth; sterile segments sessile or short-stalked. 2. B. lunaria, Swz. (MoONWORT.) Plants'—8'high, fleshy; sterile segment nearly sessile, borne near the middle of the stalk, oblong, simply pinnate with 5—15 lunate or fan-shaped lobes which are crenate, incised, or entire, close and over- lapping, or distant; fertile segment bi—tripin- nate, panicled, about the height of the sterile. Apex only of sterile segment bent over and outside of the nearly straight fertile segment in vernation; divisions of sterile frond arranged nearly perpendicularly. (Fig. 30.) Ct., N. Y., L. Superior, Col. and British Columbia. II. 3. B. boreale, Milde. Plant lyi'—Y high, smooth, fleshy; sterile segment placed above the middle, sessile, cordate, ovate or deltoid, pinnately parted, acute; lowest segment spread- ing from a narrower base, ovate or cordate- ovate, acute, all entire, or here and there fla- bellately incised with acute lobes, or pinnately port) parted; secondary segments from a narrowed base, ovate, acute, serrate, the upper spreading, quickly decreasing, finally ellip
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Keywords: ., bookauthorunderwoo, bookcentury1800, bookdecade1880, bookyear1881
