Lophosiphonia saccorhiza Collins & Herv.

• Region

  North America

• Country

  Bermuda

• Locality

  Gibbet Island

• Coordinates

  32.3232, -64.7438

• Coordinate Uncertainty (m)

  75.569

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Gibbett Island. Measured from coord. to farthest extent of the island to find linear ext. (64 m). Used MaNIS Georef. Calculator to find uncertainty (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

Collins I' Hervey.Algae of Bermuda.Contri-
butions Bermuda Biological Station for Re-
search no. 69, page 127 August 1917

2. L. Saccorhiza sp. now; P. B.-A., No. 2042. Cellulis peri-
centralibus 4; filamentis prostratis 50-70/x diam., segmentis 1-2
diam. longis; filamentis erectis numerosis, ad 2 mm. longis, 25-45^
diam., ad basin abrupte, apicem versus longissime attenuatis, prope
apicem folia bene evoluta sed fugacissima gerentibus; segment is 2-3
diam. longis, ad apicem diametro brevioribus; filamento prostrato
ad plantem hospitem rhizoideis numerosis affixo a parte inferiore fila-
menti ortis, primo cylindraceis vel ortu complanatis axis filamenti
sensu, mox in saecos ovoideos expansis, ad 800 ju longis, 100 ¿u diam.,
inter utriculos plantae hospitis penetrantes. Tetrasporangiis uniseri-
atis in parte superiore filamenti erecti sitis, diametrum filamenti
ad duplo superantibus; cystocarpiis subsphaericis, circa 100 n diam.,
apicibus ramorum proximis, segmentis proxime inferioribus saepe
ramulos breves solitarios vel paucos gerentibus. Antlieridiis folio-
rum evolutione ortis, conico-ovoideis. Colore roseo; substantia
molli. Plate II, figs. 13-14, Plate III, figs.15-17. ^ 'J
Pericentral cells 4; prostrate filaments 50-70 n diam., segments

1-2	diam. long, erect filaments numerous, up to 2 mm. long, 25-45 /j.
diam., contracted abruptly at base, gradually towards apex, segments

2-3	diam. long, at growing tip shorter than the "diam.; well developed
but very fugacious leaves formed on the upper part; prostrate fila-
ments attached to the host by numerous rhizoids issuing from the
lower pericentral cells of the prostrate filament, one or more from a
segment, at first cyclindrical in section, or flattened in a line with the
axis of the filament, below expanding into an ovoid sac, up to 800 ¡x
long, 160 n wide, penetrating between the utricles’of the host. Tetra-
sporangia in a single serie.s in the upper part of a filament, up to twice
the diameter of the filament. Cystocarps subspherical, about 100 /x
diam , near end of erect filament, one or more short branches issuing

932

COLLINS AND Ì1ERVEY.

from the segments next below. Antheridia developed from leaves,
conical-ovoid. Color rosy red; substance soft.

From the few 4-tubed species of Lophosiphonia this is distinguished
by branching characters, but specially by the great development of
the rhizoids, which show a remarkable adpatation to its habitat, the
fronds of Codium. The rhizoids take the shape of utricles, of much the
same shape and size as those of the host, but in reversed position. At
first a relatively slender cell, cyclindrical, or occasionally flattened in
a line with the axis of the filament, as soon as the rhizoid has pene-
trated between the stouter parts of the Codium utricles it expands,
and wedges itself in tightly among the latter. As seen under the
microscope, there is a striking contrast between the rosy color of one
set of utricles, and the green of the other. Type in Collins herbarium,
No. 7456, Gibbet Island, March, 1913, Hervey; also from Gibbet
Island, Jan., Smith’s Bay, March, Hervey; Tucker’s Town, April,
Cave near Ducking Stool, Hungry Bay, May, Collins. |p I 2 7

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