AAdditional notes on Botrychium tenebrosumAdditional notes on Botrychium tenebrosumde A. A. EatonEdiciones (1)Additional notes on Botrychium tenebrosum (1903)inglésMás obras de A. A. EatonPPteridophytes observed during three excursions into southernPteridophytes observed during three excursions into southern FloridaIIsoetes riparia canadensis and Isoetes dodgeiIsoetes riparia canadensis and Isoetes dodgeiTThe genus Isoetes in New England
PPteridophytes observed during three excursions into southernPteridophytes observed during three excursions into southern Florida
SSixth list of additions to the flora of Washington, D. C. anSixth list of additions to the flora of Washington, D. C. and vicinity