Rhodopeltis borealis Yamada

• Region

  Asia

• Country

  Japan

• Locality

  Yonakuni Island, Ryukyu

• Coordinates

  24.4563, 122.988

• Coordinate Uncertainty (m)

  5651.57

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Yanakuni Island. Measured from coordinates to farthest extent of the island to find linear extent (5640 m). Input information into MaNIS Georef. Calc. to find uncertainty radius (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

Rhodopeltis borealis sp. nov.
PI. XIX. Fig. 1.
Frons minor, ca. 4 cm alta, a radice parva cartilaginea vix incrustata
fasciculate caespitosa, rosea, multo calce incrustata, dense dichotomo-
fastigiata et saepe prolificationibus ornata, ad nodos hie illic fracta;
internodiis complanatis, 2-3 mm latis, ad basin contractis subobconicis,
diametro 1.5-2.5 plo longioribus, sicco canaliculatis, glaberrimis, fragi-
lissimis, subnitidis. Tela peripherica crassa, e 7-9 stratis cellularum
constructa; cellulis interioribus majoribus ovatis vel ellipticis, 40-50 ¡jl
longis, cellulis exterioribus sensim minoribus; cellulis periphericis 3-4 ¡x
latis. Medula vix incrustata, filis 5-7 ¡jl crassis longitudinaliter dense
percursa. Nemathecia cystocarporum rotundata vel elliptica, diametro
ca. 1.5-2.0 mm magna, sparsa,
Loc. Riu-kiu (S. Sakaguchi); Ryusensui (!), Kotosho (S. Sasaki),
Formosa.
Frond small, about 4 cm high, standing on a small, cartila-
gineous, uncalcified root and very short stem. Those uncalcified parts
originate in the fall of the peripheral tissue after growing up of the
frond. Other parts of the frond are very strongly calcified, often
being broken at the base of the branches, red in colour. The branch-
ing is very dense, dichotomo-fastigiate and branches are often provided
with proliferating branchlets. Internods 2-3 cm broad, slightly nar-
rowed at the base, thus becoming subobconical, about 1.5-2.5 times as
long as diameter; in dried specimens they are very smooth, slightly
shining, not zonate and very brittle. Anatomically the frond consists
of a strongly calcified peripheral layer and an uncalcified medula;
the former being constructed from 7-9 layers of ovate or elliptical cells,
which are largest at the innermost side and become smaller gradually
towards the periphery, the diameter of the smallest, outermost cells
being about 3-4 ' The medula is composed of filaments, whigh run
densely in the longitudinal direction and measures about 5-7 ¡x in
diameter. The cystocarpic nemathecia are round or elliptical in shape,
mmw.
NEW YORK
BOTANICAS,
OAR DEIN
Rhodopeltis borealis Yainada
Yonakuni Island, Ryukyu.
NEW YORK BOTANICAL GARDEN
01089175
net a. hp
SbH*H
about 1.5-3D mm
of the frond..
In diameter, scattealmostly in the upper parts
Amphiroa australis Son!. and Khodopeltis australis H! arv. were
figured, by Harvey in Phyc. Austr. as two independent species. He
regarded the latter specfies as a parasite growing on the former.
On the other hand , Kutzing deliniated Sonder*s specimen in his
Tab. Phyc, (V. pi. 50, f. 1) and adds the note: Die Strukter
dieser Art, und namentlich die Kortlifcalschicht ist so eigentümlich
dass sie von den allen übrigen Gorallinen abweicht. Ich vermute
daher, dass diese Art eine eigne Gattung bildet, welche mit der fol-
genden Art (A. dilatata) nur etwas von Habitus G-emeln hat.
Afterward, however, Schmitz considered both species of Sonder
and Harvey as one and the same plant, looking upon H. australis
Harv. as the nemathecium of the plant called A. australis Sond. and
he referred this plant to the Hhizphyllidaceae calling it R. au-
stralis (Harv) Schm. (in Floral889). Weber van Bosse, however, es-
tablished a new genus called Liteharthron in her Siboga’s Coralline*
ceae basing upon Bonder’s &. australis, and Yendo appears to have
followed her oninion.
The specimens in my hand ?r*rom Formosa and Biu-Kiu show many
common characteristics with the Australian one. I was fortunate
enough to compare my specimens with the type specimen of Harvey in
Dublin. The latter is much larger and stronger than the ^ormer,
the diameter of the nemathecia attaining about 1 cm.
Jour. Fac. Sci. Hokkaido Imp. Univ.
V.
1J. 75. Afl931
NEW YORK BOTANICAL GARDEN
01089174
-PZcdau s/%
Fig. 1. Rhodopeltis borealis
The type specimen, x 1
NEW YORK
BOTANICAL
GARDEN
01089175
01089174