Botrychium Swartz Botrychium Botrychium, E. Hitchc.

2. Botrychium Swartz View in CoL 3

Lamina usually compound, 1 - to 4-pinnate, rarely simple, oblong to triangular, somewhat fleshy, with dichotomous free veins. Fertile spikes always compound, with subsessile free sporangia in two rows.

1 Lamina oblong, ovate or triangular-ovate, longer than wide, almost glabrous

2 Lamina simple, trilobed, or pinnate; pinnae with dichotomous veins and without midrib

3 Lamina petiolate, simple or trilobed or pinnate, with

2(-4) pairs of pinnae 1. simplex 3 Lamina sessile, always pinnate, with (2)3-9 pairs of pinnae

2. lunaria 2 Lamina 2-pinnate; segments with ± conspicuous midrib

4 Segments about as long as wide, triangular to rhomboid or ovate 3. boreale 4 Segments longer than wide, lanceolate to oblong (if wider,

then pinnatifid)

5 Segments acute, lanceolate to linear-lanceolate, with pronounced midrib 5. lanceolatum 5 Segments obtuse, ovate to oblong, with somewhat inconspicuous midrib 4. matricariifoiium

1 Lamina broadly triangular, wider than long, hairy at least when young.

6 Laminafleshy,petiolate,2 - to3 -pinnate; segmentsobtuse

6. multifldum 6 Laminamembranous,sessile,3 - to4 -pinnate; segmentsacute

7. virginianum

1. B. simplex E. Hitchc. View in CoL in Silliman Amer. Jour. Sci. Arts 6: 103 (1823).

Leaves 2—10(— 15) cm; lamina with a long petiole, simple, trilobed, trifoliolate orpinnate, with 2 orrarely 3-4 pairs of obovate or roundish, entire pinnae with rounded (rarely lobed) apex. N. & C. Europe from 66° N. southwards, extending to C. France, the Italian Alps and C. Jugoslavia. Au Be Co Cz Da Fe Ga He Is It Ju No Po Rs (N, B, C) Su.