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To find the name of a fern. Observe if the stem divides into two branches or forks.
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(a) | Feather-like parted (pinnatifid), i. e., divisions not reaching to midrib or stem. |
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(b) | Feather-like divided (pinnate), i. e., divisions reaching to midrib or stem. |
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(c) | Once divided, and divisions parted. |
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(d) | Twice divided (two pinnate). |
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(e) | Twice divided, and divisions parted. |
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(f) | Three times divided (three pinnate, or ternate). |
Compare general shapes, stems, and points with drawings on the black-ground plates; also lower leaflets with detail drawings in regard to veins, sawteeth, points, and fruit dots.
The drawings are all about one-third natural size.
