Ophioglossaceae

References: Clausen (1938), Wagner and Wagner (1993), Gilman (2002).

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Ophioglossum
1a. Trophophores (i.e., vegetative portion of leaf blades) simple, entire; venation reticulate; sporangia borne on a compact, linear sporophore
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Botrychium
1b. Trophophores lobed or compound (rarely simple in B. tenebrosum), the ultimate segments entire or toothed [Figs. 26,28]; venation forking; sporangia borne on pinnately branched sporophores [Figs. 28,29]

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