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Botrychium boreale (Fr.) Milde  
Family: Ophioglossaceae
[Botrychium brevifolium Ångstr., moreBotrychium crassinervium Rupr., Botrychium lunaria var. boreale (Milde) Fr.]
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  • FNA
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Warren H. Wagner Jr.
Florence S. Wagner in Flora of North America (vol. 2)
Trophophore stalk sessile or nearly so; blade shiny green, ovate-deltate, 1--2-pinnate, to 6 cm, fleshy. Pinnae to 6 pairs, ascending, mostly overlapping, distance between 1st and 2d pinnae only slightly greater than between 2d and 3d pairs, basal pinna pair usually considerably larger than adjacent pair, obliquely rhomboidal to oblanceolate-spatulate, mostly shallowly lobed to rarely pinnate, margins entire to very narrowly shallowly crenulate, apex pointed, venation pinnate only at bases of proximal pinnae, otherwise ± like ribs of fan. Sporophores 1--2-pinnate, 1--1.5 times length of trophophore. Leaves appearing in July and August. Dry meadows, south-facing slopes; 200--600 m; Greenland. This well-marked northern Eurasian species is best known in Scandinavia, where it occurs most commonly with Botrychium lunaria , with which it occasionally hybridizes.

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The PCC, and this data portal, were made possible by funding from the National Science Foundation’s Advancing Digitization of Biological Collections (ADBC) program, grant numbers 1802504, 1802352, 1802134, 1802033, 1802270, 1802255, 1802239, 1802446, 1802305.
The pteridoportal taxonomic thesaurus is based on the Checklist of Ferns and Lycophytes of the World, generously provided by Michael Hassler.