Ceramium leptozonum M.Howe

• Region

  North America

• Country

  Bermuda

• Locality

  in the ponds of Walsingham

• Coordinates

  32.3484, -64.7115

• Coordinate Uncertainty (m)

  491.569

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Idwal Hughes Nature Reserve. Measured from coord. to farthest extent of the park to find linear ext. (480 m). Used MaNIS Georef. Calculator to find uncertainty (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

T<^	> c> 31 ? 1*1/%.

Ceramiutti leptozonum M. A. Howe, sp. nov. Plants delicate, Indian
a e 01 deep purplish-vinaceous, c^icspitose, diehotomous, fastigiate, 14-3 cm.
* ? ma,ln filaments 40?7>2 ­x in diameter, lightly corticated at nodes only, the
1(r. řtřmies acute, the apices slightly forcipate or subereet; internodal cells
cy indrie below^ and 14-4 times as long as broad, becoming ovoid and shorter
a ove, all provided with conspicuous fibrillar chromatophores, becoming decol-

orate below; nodal bands of corticating cells very narrow, slightly protuberant,
mostly only one cell wide (high), the cells with their longer axes (20-40 m)
usually directed lengthwise of the filament, about four cells measuring the
diameter of the filament, irregular smaller cells sometimes forming an imper-
fect second (upper) row; tetrasporangia solitary or 2 or 3 at a node, mostly
secund along the outer side of the filament, occasionally subverticillate, 50-65 m
in maximum diameter, the primary wholly naked, the secondary (formed by
regeneration) subtended by 2-4 small sterile cells and thereby often much
exserted or substipitate, the tetraspores somewhat tetrahedrally disposed.

Type from a pond at Walsingham, having subterranean communication
with the sea, (Hoive 99, in herb. N. Y. Botanical Garden).

Ceramium leptozonum is related to C. byssoideum and the plants currently
known as C. tenuissimum, but seems to be amply distinct in having ordinarily
only a single row of corticating cells at the nodes, these cells nearly always
elongate in the direction of the filament, and in the naked primary tetra-
sporangia. In the narrow nodal zones, the regenerating tetrasporangia, and
the rather persistent coloring of the protoplasts of the large internodal cells,
the species is slightly suggestive of Ceramothamnion Codii, from which it is
easily distinguished by the apparently non-repent habit, the diehotomous
stouter and taller filaments, the usually single instead of double row of nodal
cells, which are also more elongate, the relatively smaller naked primary
tetrasporangia, etc. Ceramium cruciatum and C. tenuissimum also sometimes
show persistently colored fibrillar chromatophores in the internodal cells. In
soaked-out dried specimens, the nodal cells often appear to be more numerous
than they really are, owing to the segregation of chromatophores or to the
purely optical cutting of these cells by the nodal diaphragm. The tetraspores
^ sometimes gerbinate in situ, giving rise to small proliferations. The species
is apparently endemic.

BERMUDA ALGAE

Collected in the Bermuda Islands
by Marshall A. Howe, June 5 - July 7, 1900

^EW

BOTANICAL

¨L 'yu

In the ponds of Walsingham
(having subterranean communication with the sea)

TYPE

HERBARIUM ? F
THE NEW YORK B OTAN ICAL BARDEN

NEW YORK BOTANICAL GARDEN

ALGAE DF

BERMUDA

009000

99. Ceramium leptozonum M. A. HOWE
In the ponds of Walsingham
(having subterranean communication with the sea)

June 5 - July 7, 1900

Collected by M. A. Howe

WOLO TYPE OF:

Ce^AHiOM LEVT03.0HUH H-

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( N^VtW zool.

HERBARIUM BF
THE NEW YORK BUTANICAL GARDEN

ALGAE OF BERMUDA

99. Ceramium leptozonum M. A. Howe
In the ponds of Walsingham.

(having subterranean communication with the sea)

June 5 - July 7, 1900

Collected by m. A. Howe

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0 1	2	3 4	5	6 7 8	9 10	The New York
cm				copyright reserved		Botanical Garden

SLIDES	HERBARIUM BF

THE NEW YD R K BOTANICAL BARDEN

ALGAE DF BERMUDA
99. Ceramium leptozonum M. A. Howe
In the ponds of Walsingham.

(having subterranean communication with the sea)

June 5 - July 7, 1900

SLIDES	HERBARIUM DF

?THE NEW YBRK BBTANICAL GARDEN

ALGAE GF BERMUDA