. Our native ferns and their allies [microform] : with synoptical descriptions of the American pteridophyta north of Mexico. Ferns; Fougères. ^2 OUR NATIVE FERNS AND THEIR ALLIES, J, I â III! X \ spores maturing in autumn ; leaf long~stalked. \ Ultimate leaf-s^ments laciniate, narrow, ^' or less wide. 9. B. disseotum Sprang.âPlant 6'â15' high, with slender fleshy stems. Leaf long-stalked from near the base of the stem, with broadly deltoid basal divisions, decompound; sec- ondary pinnae lanceolate from a broader base, pinnate with laciniate and deeply cut pinnules, the ultimate divisions dive
. Our native ferns and their allies [microform] : with synoptical descriptions of the American pteridophyta north of Mexico. Ferns; Fougères. ^2 OUR NATIVE FERNS AND THEIR ALLIES, J, I â III! X \ spores maturing in autumn ; leaf long~stalked. \ Ultimate leaf-s^ments laciniate, narrow, ^' or less wide. 9. B. disseotum Sprang.âPlant 6'â15' high, with slender fleshy stems. Leaf long-stalked from near the base of the stem, with broadly deltoid basal divisions, decompound; sec- ondary pinnae lanceolate from a broader base, pinnate with laciniate and deeply cut pinnules, the ultimate divisions diver- gent, often 2-toothed at their apices, usually less than i mm. wide; sporophyll long-stalked, 2â3-pinnate; bud pilose, en- closed in the base of the stem, both portions bent in vernation. New England (where a more compact variety is more common) to Virginia and inland to Kentucky and Indiana. III Leaf-segments small, rounded, or obliquely ovate, i\"â3" wide ; plant small {leaf i'â2' wide). 10. B. matrlcarlae (Schrank) Spreng. Plant 4'â6'high, with slender flesh/ stems; leaf moderately short-stalked, ternate, small, i'â2 wide and high, the three divisions similar, bipin- natifid or bipinnate; ultimate segments small, i^'â3" wide, rounded or somewhat obliquely ovate, the margins undulate or crenate; sporophylls rather long-stalked for the size of the plant, 2â3-pinnate with large sporanges; bud pilose. Northern New England and New York and northward. II III Leaf-segments obliquely ovate, large, 5"-10" long. {Eastern.) 11. B. obllquum Muhl. Plant robust, 7'â20' high; leaf rising from near the base on a stalk 3'â4' long or more, ternate with the three divisions nearly equal, bipinnate or somewhat tripin- natifid in larger forms, the ultimate segments obliquely ovate or oblong-lanceolate, the terminal one of each division elongate, all 5"â10" long, 2i"â4" wide, the margins cre- nate or serrate; sporophyll long-stalked t
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