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VII. Pteridophyten. 
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— Some modern varieties of the Boston fern at their source. (Journ. N. York Bot. 
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Bolzon, P. Flora del Monte Marmolada con osservazioni sopra talune associazioni. 
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The American variations of Lycopodium annotinum. (Rhodera XVII [1915], 
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Greene, F. C. A preliminary list of the ferns of Rolia, Missouri. (Americ. Fern Journ. 
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Hayata, B. Can Prosaptia properly be placed under Davallia ? i. e. is it really distinct 
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Hieronymus, G. Neue Arten von Vittarieen aus den Gattungen Vittaria Sm. und 
Antrophyum Kaulf. (Hedwigia LVII [1916], p. 200 — 214.) 
