Acrochaetium hoytii Collins

• Region

  North America

• Country

  United States of America

• State/Province

  North Carolina

• County/Municipio

  Carteret Co.

• City/Township

  Beaufort

• Locality

  Fort Macon Break-water, on Dictyota dichotoma (Huds.) Lamour

• Coordinates

  34.6962, -76.6789

• Coordinate Uncertainty (m)

  2836.57

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Can't find breakwater. Located coordinates of approx. geogr. center of Fort Macon. Measured from coord. to approx. geogr. center of nearest named place, Atlantic Beach; 1/2ed dist. (2825 m). Input info into MaNIS Georef. Calc. to find uncert. radius (Undefined Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

Acroohaetium Hoytil Collins, n. sp,
Bhodora,10: 134. Au 1908.

Oellula basali (spora original!) rotundata, 12-25 p diam.,
vel verticaliter elongata, tunc ad 30 P- longa, filamenta 1-3
erecta, 6-7 u diam., emittente, cellulis 2-4 diam. longis,;
ramificatione subfrequente inferne, supeme minus frequente,
ramis ultimis praelongis, simplicibus vel subsimplicibus, in
setam tenuissimam attenuatis. Sporis lateralibus, oblongis,

6-15 U. ad pedicellum unicellulare, parte superiore filamenti
affixis.

Basal cell (original spore) 12-25 U diam., spherical or
somewhat elongate vertically, then up to 30 p long; .1-3 fila-
ments arising from each basal cell; main filament about 6 ]i
diam., cells 2-4 diam. long; branching rather frequent below,
rarer above; ultimate branches very long, simple or nearly so,
gradually tapering into a hair. Spores lateral on the upper
part of the filament and branches, on one-celled pedicels, ob-
long, 6X15 )i. On Dlctyota dichotoma (Huds.) Lamour., Beau-
fort, North Carolina.

W. D. Koyt.

In this species the germinating spore not merely remains
distinct through the life of the plant, but increases to sev-
eral times its original size, and may s^nd up more than one
vertical filament. At least this seems to be the only explan-
ation of the appearance presented. The large cell is more or
less imbedded in the cortex of the host, but has neither descending
nor lateral growth. A mong American species it seems nearest
related to A. Dasyae Collins, but in the latter the persistent
spore increases little if any in size, and has not been observed
to produce more than one erect filament. T he spores in A. Das-
yae are larger and sessile. This plant was received from Mr.
fioy't, who has been making some interesting studies in Dlctyota
at the Beaufort station of the U. S. Bureau of Fisheries, of
which some of the results have been published. The type is in
the herbarium of the National Museum. For a liberal supply of
^identical material, to be distributed in the Phycotheca Boreali
Americana, the writer is indebted to the authorities of the'Bur-
eau of Fisheries.

Malden, Massachusetts.

(giantransia Hoytii nov* comb. Collins,
Rhodora^tf: 186* Aug© 1911*

Acroohaetium Hoytii Collins, RH0D0RA, Vol* X, p» 154« P* B»—A», No* 15^0*
Among the material collected by Dr® Hoyt another species of Qhantransia occurs,
which seems to be identical with a Mediterranean plant long since distributed in
Erb. Crit* Ital*, under the name of an Atlantic coast species, Callithamnion Lenor-
mandi Suhr; though Bomet ° notes that the two are distinct he does not propose a

new name; it may now be called

-?

Annotated

e c.

19.

BY.

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00899987	by ... ..	2

Phycotheca Boreali-Americana. Collins, Holden, and Setchell.

1540. Acrochaetium Hoytii coiims.

Collins, Rhodora, Vol. X, p. 184, 1908.

On Dictyota dichotoma (Huds.) Lamour, Fort Macon Break-
water, Beaufort, North Carolina, July 13, 1908.

U. S. Bureau of Fisheries, Beaufort Station; collected by
W. D. Hoyt.

The New York
copyright reserved botanical garden

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00899987