Batrachospermum boryanum Sirodot

  • Filed As

    Batrachospermaceae
    Batrachospermum boryanum Sirodot

  • Collector(s)

    L. N. Johnson s.n., Nov 1893

  • Location

    United States of America. Michigan. Washtenaw Co. Ann Arbor. in swift water in Huron River.

  • Identifiers

    NY Barcode: 02341299

    Occurrence ID: 2258dd65-489c-4d53-9aee-e641ed0d614e

  • Exsiccatae

    Phycotheca Boreali-Americana, a collection of dried specimens of the Algae of North America

    Exsiccatae Number: 187 c

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  • Region

    North America

  • Country

    United States of America

  • State/Province

    Michigan

  • County/Municipio

    Washtenaw Co.

  • City/Township

    Ann Arbor

  • Locality

    in swift water in Huron River

  • Coordinates

    42.291, -83.7257

  • Coordinate Uncertainty (m)

    4901.57

  • Georeferencing Method

    Georeferencing Quick Reference Guide, Version 2012. Located coordinates of mdpt of Huron R in Ann Arbor by Measured btw endpts; 1/2ing dist., choosing closest coord. on shore. Meas. from coord.- farthest extent of section =linear extent (4890 m). Input info into MaNIS Georef. Calc. = uncert. rad.

  • Geodetic Datum

    WGS84

  • Distribution

    Map all specimens of this taxon

Phycotheca Boreali-Amerioana. Collins, Holden, and SetchelL
187. Batrachospermum Boryanum sirdt.
Sirodot, Les Batrachospermes, pp. 246-249, Pis. XXIX-XXXI, 1884.
a.	In running brooks, winter and spring, Bridgeport and Strat-
ford, Conn.
ISAAC HOLDEN.
b.	Brook in Middlesex Fells, Mass., April 14, 1890.
With antheridia.
F. S. COLLINS.
c.	“ Chantransia ” stage. Very abundant all winter on Potamog-
etón, etc., in swift water in Huron Elver, Ann Arbor, Mich., Nov.
1893.
L. N. JOHNSON.
This species, which is very widespread in the United States, although very
variable in external form is however fairly readily recognized. The character-
istic trichogyne is ovoid, but is generally distorted so as not to be readily
distinguished from the lageniform trichogyne of the moniliforme group.
The species differs from any of that section as well as from those of its own
section in being completely dioecious. The older specimens are characterized
by the cask-shaped verticils being much separated, while between them there
has been developed a cylindrical growth of interverticillary filaments, as is
shown in the various specimens distributed.
The prothalloid and Chantransia growths of this species are readily ob-
tained and studied, and the “metamorphosis” was demonstrated by Dr. John-
son in the case of the Chantransia distributed under (c). This species reaches
a length of 25-80 cm.
W. A. S.
02341599