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Rh

Rh

1. A native specimen of Woodsia hyperborea, natural size.

2. The stipes and lower part of the frond of the same plant, magnified 3 times in diameter.

3. A pinna of the same plant, magnified 10 diam.

4. A pinna from another specimen, in which the clusters of capsules (sori) are more numerous and confluent, 10 diam.

5. A single cluster of capsules within their involucrum, the membranaceous base of which they entirely conceal, magnified 50 diam. (2500 times in superficies).

6. The involucrum spread open, with only one capsule left in it, magnified 50 diam.

7. An unripe capsule.

8, 9. Side and back views of a ripe capsule.

10,11. Capsule opening and entirely burst, shedding its seeds.

} magnified 50 diam.

12. A seed magnified 200 diam.

13. A frond of a cultivated plant of the same species, natural size.