Part 11

Small. Sterile portion an ovate leaf. Fertile portion a slender spike. In moist meadows. P. 77.

9. RATTLESNAKE FERN

Botrychium Virginianum

Rather large. Sterile portion a thin, spreading, ternately divided leaf with three primary divisions; 1-2 pinnate. Fertile portion a branching fruit-cluster. In rich woods. P. 80.

10. TERNATE GRAPE FERN

Botrychium ternatum or dissectum

Of varying size, very fleshy. Sterile portion a broadly triangular, ternate, finely dissected leaf, long-stalked from near the base of the stem. Fertile portion a branching fruit-cluster. In moist meadows. P. 81.

11. LITTLE GRAPE FERN

Botrychium simplex

A very small fleshy plant. Sterile portion an oblong leaf more or less lobed. Fertile portion a simple or slightly branching spike. In moist woods and in fields. P. 82.

12. MOONWORT

Botrychium Lunaria

Usually small, very fleshy. Sterile portion divided into several fan-shaped lobes. Fertile portion a branching fruit-cluster. Mostly in fields. P. 84.

13. MATRICARY GRAPE FERN

Botrychium matricariæfolium

Small, more or less fleshy. Sterile portion ovate or oblong, once or twice pinnatifid. Fertile portion a branching fruit-cluster. In grassy woods and wet meadows. P. 86.

14. LANCE-LEAVED GRAPE FERN

Botrychium lanceolatum

Small, scarcely fleshy. Sterile portion triangular, twice-pinnatifid. Fertile portion a branching fruit-cluster. In woods and meadows. P. 86.

GROUP III

FERTILE FRONDS UNIFORMLY SOMEWHAT LEAF-LIKE IN APPEARANCE, YET DIFFERING NOTICEABLY FROM STERILE FRONDS

15. SLENDER CLIFF BRAKE

Pellæa gracilis

A small fern, 1-3 pinnate. Very delicate. Fertile fronds taller, more contracted and simpler than the sterile, sporangia bordering the pinnæ. Usually on sheltered rocks, preferring limestone. P. 87.

16. PURPLE CLIFF BRAKE

Pellæa atropurpurea

Medium sized, 1-2 pinnate, leathery. Fertile fronds taller and more contracted than the sterile, sporangia bordering the pinnæ. Usually on exposed rocks, preferring limestone. P. 90.

17. CHRISTMAS FERN