Laurencia yamadana M.Howe

• Region

  Oceania

• Country

  United States of America

• State/Province

  Hawaii

• Locality

  Oahu, Kaneohe Bay, near Wilcox Wharf

• Coordinates

  21.4546, -157.816

• Coordinate Uncertainty (m)

  6571.57

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Kaneohe Bay. Measured from coordinates to farthest extent of the bay to find linear extent (6560 m). Input information into MaNIS Georef. Calc. to find uncertainty radius (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

new roMM.

BOTANICAL	January 15, 1934	howe: Hawaiian algae

garden

Laurencia yamadana sp. nov.7

Frond spreading or reclinate, 5-7 cm. (or more?) high or broad, in branch-
ing irregularly 3 or 4 times compounded (or when pressed and dried,
pseudo-tri-quadripinnate), the branches mostly divaricate, the primary

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ALGAE OF THE HAWAIIAN ISLANDS

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PAUL C. GALTSOFF, Collector

193°

Fig. 4.—Laurencia yamadana. Holotype, left from fluid; right,
same specimen dried. Natural size.

2-4 cm. long, the ultimate branchlets clavate-obtuse and 2-3 mm. long or
mostly subterete-turbinate or verrucaeform and only 0.45-0.8 mm. long,
emerging in various planes, for the most part separated by spaces equal to
their own length; main axes terete or very slightly flattened, about 1-1.3 mm.
in diameter, their surface cells angulate-suborbicular, 20-45ju in diameter,
rather thin-walled, often separating, in transverse section slightly higher
than broad; surface cells of ultimate branchlets often oval or subelliptic
with longer axis transverse, 16-40/* in maximum diameter, thick-walled, in
transverse section palisade-like, commonly twice as high as broad, or, in
apical region, thrice as high; walls of medullary cells without lenticular
thickenings; other parts wanting. [Figure 4.]

Apparently associated with Hypnea nidifica, near Wilcox wharf, Kaneohe
Bay, Oahu, Paul C. Galtsoff, July, 1930. The holotype is divided between
The New York Botanical Garden and the United States National Museum.

Laurencia yamadana belongs to Yamada’s section Palisadae and is prob-
ably more allied to his Laurencia palisada8 of Japan and Formosa than to
his L. intermedia of Japan. It appears to differ from Laurencia palisada in
its less distichous branching and in its shorter, more divaricate, and less
capitate ultimate branchlets.

Hypnea nidifica J. Ag. Originally described from the Hawaiian Islands.

Chondria tenuissima (Good. & Woodw.) Ag., var. Apices of the ramuli
are occasionally broad and obtuse as in var. intermedia Grun.

POLYSIPHONIA TONGATENSIS Harv.

7^Fronde effusa aut reclinata, 5-7 cm. (an plus?) alta aut lata, irregulariter 3-4-ties
compositi-ramosa (aut, compressa et exsiccata, pseudo-tri-quadripinnata), ramis
plerumque divaricatis, primariis 2-4 cm. longis, ramulis ultimis clavatis obtusis et
2-3 mm. longis aut plerumque subtereti-turbinatisautverrucaeformibuset 0.45-0.8 mm.
longis, quoquoverse egredientibus, pro parte maxima spatiis suis longitudinibus
aequalibus separatis; caulibus vel ramis primariis teretibus aut aegre compressa, circa
1—1.3 mm. crassa, cellulis superficialibus angulati-suborbicularibus, 20-45/i latis, in
sectione transversali parum altioribus quam latis, denique saepe separantibus, ramu-
lorum ultimorum cellulis superficialibus ovalibus aut subellipticis a superficie visis,
16-40/i in diam. max., parietibus crassis, in sectione transversali cellulis valliformibus,
plerumque bis altioribus quam latis, aut in regione apicali ter altioribus; cellularum
medullarium parietibus partes incrassatas non ostendentibus; partes aliae desunt.

Cum Hypnea nidifica J. Ag. consociatam, speciem Laurenciae palisadae Yamadae
affinem, in sinu “Kaneohe” dicto, insulae “Oahu” hawaiiensis, Jul. 1930, Paul C.
Galtsoff legit.

8 Yamada, Y. Univ. Calif. Pubi. Bot. 16: 196. fig. c and pi. 4-fid- a- 1931.

Jour. Wash. Acad. Sci. 24: 37, .Ja 1934

HOLOTYPE OF:

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