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North American Musci Pleurocarpi

ISSUED BY A. J. GROUT, PH. D.

471. Amblystegium ripareum obtusum, n. var.

In water in swamp by Franklin Road,
near Baltimore, Md.

June, 1914

Coll. Rev. Boyer, Comm. Dupret

Robust, floating, scarcely to be distinguished from var. fluitans (L.&J.)
R. & C., except for the bluntish apex of the leaves, which much resembles
that in A. vacillans to which this form has previously been referred.
Comparison of this plant with the type of A. vacillans shows it to be much
more robust than that species with alar cells much less distinct and with
the leaves more plainly decurrent. No. 355 N. Am. Musci Pleurocarpi
is to be regarded as the type as it is more uniform than the Baltimore
plant. No. 269 is probably best treated as a form of the same thing.

Leplodictyum riparium (L.) Warnst.
VAT. obtusum Grout.

Yale University Herbarium

YU.231658