Callithamnion herveyi M.Howe

• Region

  North America

• Country

  Bermuda

• Locality

  Smith's Bay

• Coordinates

  32.3192, -64.713

• Coordinate Uncertainty (m)

  185.569

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates on shore closest to geogr. center of John Smith's Bay. Measured from coord. to farthest extent of the bay to find linear ext. (174 m). Used MaNIS Georef. Calculator to find uncertainty (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

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Callithamnion Herveyi M. A. Howe, sp. nov. Plants dingy purple, sub-
fuscous in age, gelatinous, forming tufts or cushions 2-4 cm. high, ramifica-
tion densely and repeatedly decompound, for the most part irregular or ob-
scurely tetrastichous, the ultimate ramelli more or less subdistichous or
dichotomo-distichous; main axes with rhizoidal cortications for three fourths
or more of their length, 0,3-0.35 mm. in diameter at base and in older parts
loosely hirto-tomentulose with simple or irregularly branched rhizoidal
ramelli; cells of the largest uncorticated branches 40-80 fi in diameter, sub-
cylindric, mostly l|-2 times as long as broad, their walls 12-25 n thick; ante-
penultimate ramuli cylindric-plumose, mostly 0.8-1.5 mm. long, and, with the
patent or erecto-patent ramelli, 0.3-0.6 mm. broad; cells of the ultimate
ramelli 14?'2 (rarely 3) times as long as broad, the terminal obtuse, 8-12 /u in
diameter, occasionally piliferous; dioicous; antheridia subglobose or sub-
hemispheric, 30-50 ft in diameter, usually crowning a short but manifest one-
celled pedicel; cystocarps subglobose, 100-220 /j. in diameter, scarcely. lobed, %
often geminate; tetrasporangia lateral, mostly solitary, irregularly scattered
or occasionally subsecund, obovoid or subglobose, mostly 38?40 fi in maximum
diameter, tetrahedrally divided or spores sometimes subdecussately paired;
monosporangia terminal, frequent on cystocarpie plants, occasional on anthe-
ridial and tetrasporic plants, scattered or irregularly clustered* solitary, some-
times concatenate in twos (very rarely in threes), obovoid, ellipsoid, pyriform,
or subglobose, 36?65 /®. in longer liameter. [ Phyc. Bor.-Am. 2046 as Cal-
lithamnion Hoolceri (Dillw.) Ag.]

Type from Smith?s Bay, December, 1913, communicated by F. S. Collins
as no. 8005, and preserved in the herbarium of the New York Botanical
Garden. The species is named in honor of Rev. Dr. A. Jf". Hervey, author of 25

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