Our Native Ferns And How to Study Them; With Synoptical Descriptions of the North American Species

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Club, June, 1880.
^'^^ Fronds deltoid-ovate, tri — quadripiunate at base.
XRachises straight or nearly so.
9. N. dealbata,* Kunze. Stipes densely tufted, nearly black ; rachis and all its branchesstraight, capillary ; fronds deltoid-ovate, quadripiunate at base gradually simpler above ; pinnje mostly op- posite ; ultimate pinnules oval, entire or some of them 3-lobed.
Upper Missouri to N. Mex. and Ariz. V.
XXRachises zigzag and flexuous.
10. N. nivea, Desv. Rhizoma short, chaffy with narrow sca
...les; stipes tufted, 4'— 6' long, wiry, black and polished; fronds 3'— 6' long, ij' — 1'. broad, pyramidal-ovate, tripinnate ; primary pinnae mostly opposite the rachises, nearly straight ; pinnules long-stalked with blunt oblong or roundish, entire or more or less lobed seg- ments;' upper surfaces green, smooth, lower densely coated with pure white powder; sori brown, often descending the free veins half-way to the midvein. Ariz., N. Mex., 1880. V.
11. N. Fendleri,* Kunze. Stipes densely tufted, dark -brown, 3' — 5' long ; rachis and all its branches zigzag and flexuous ; fronds broadly deltoid-ovate 3' — 5' each way, quadripinnate below, grad- ually simpler above; pinnae alternate; ultimate pinnules oval or elliptical, simple or 3-lobed.


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