Acrothrix novae-angliae W.R.Taylor

• Region

  North America

• Country

  United States of America

• State/Province

  New York

• County/Municipio

  Suffolk Co.

• Locality

  Noyack Bay, Suffolk Co., L. I.

• Coordinates

  41.0107, -72.3426

• Coordinate Uncertainty (m)

  647

• Georeferencing Method

  GEOLocate Web Application. Used GEOLocate Web Application to georeference precise locality. (High precision.)

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

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Acrothrix novae-angliae n. sp. Wm*R. Taylor, American
Journal of Botany, XV: 577-583. p.578. December, 1928.

Plant loosely tufted, light brown in color, to 25
cm. tall and about 40 cm. in diameter; smooth but not
slimy, somewhat flaccid in the distal parts, but comp-
aratively rigid toward the base and collapsing very
little on being removed from the water; attached by a
rather thin, lobed, disciform hapteron- branching
radia, alternate, to 3 (occasionally 5; orders, in
places appearing aichotomous, members of all orders
frequently somewhat contracted at the base, otherwise
cylindrical except that the ultimate members taper to
an acute apex, 0.5-0.75-1.50 mm. in diameter, the main
axis soon dissolving into long primary branches which
may equal or exceed it in length; secondary or tertiary
branches inserted at about 60® to the supporting axis,
somewhat angularly bent, usually exceeding the long
(to 10 cm.) alternate flexuous flagelliform or sub-
falcate branches of the succeeding order which are naked
or bear a few short (1-2 cm.) curved ramuli; at the base
of the plant several short, very slender primary branch-
es may be present, especially rigid and rather closely
branched; structurally the older parts show a subparenchy-
matous cortex about the axial civity, the inner cells large
and colorless, the outer or peripheral cells much smaller
and with a few small chromatophores; surface loosely
clothed with chromatophore-bearing assimilatory fila-
ments, which arise singly or in pairs from some of the
outer cortical cells, if single frequently 2-rarely 3-
branched, straight or more often arcuate, 3-5-6-9 cells
long, the lower or basal cell short, the next frequent-
ly elongate, the upper cells moniliform, often asym-
metrical, 6.3-8.0 /x in average diameter, and 0.75-1.50
times as long as broad; colorless hairs not abundant,
having an average diameter of 7.7 Ai, replacing branches
of assimilative filaments; sporangia usually attached
to the basal cell of the assimilative filaments, gen-
erally single, but occasionally up to 3 sporangia dnd
one assimilative filament attached to a single basal
cell, at first ovoid, later subspherical and 21.7-26.75-
30.7 ax in diameter, uniocular, at maturity producing
numerous zobspores which are round-ovoid, about 4.6 xi
in greatest diameter, and show one large chromatophore
and a very prominent eyespot. Type Herb. W.R.T.,

Ho. 13234, coll. J J. Copeland drifting off Robska Pt.,
Wood's Hole, llassaehusetts, July 8, 1927."

02223879