Cryptonemia undulata Sond.

Cryptonemia undulata Sonder in Linnaea, vol. xxvi. 516;
Harvey,.Phyc. Austral, tab. 205; Kiitzing, Tab. Phycol. 19, tab. 31..
Ind^a': Dredged off Dwarka at about 5 fathoms ; Okha Port;
Karachi, J. A. Murray (in Herb. Kew.) ; K. G. Naik (a single
specimen in spirit).
Distr. Australia.
This plant may now be recorded from the Indian Ocean. In the
Kew Herbarium are to be found some large specimens from Karachi
labelled Delesseria subdichotoma, but it is evident that they do not
belong to that family but to the Cryptonemiales. They agree in fact
with Cryptonemia undulata, specimens of which I have seen from
Encounter Bay and Champion Bay in J. Agardh?s Herbarium at
Lund. My specimens are irregularly divided, the lobes having a
breadth of ^-3 cm. with vigorous nerves which run up through the
thallus and become divided several times until they disappear.
Along the edges of the older part of the thallus more or less numerous
proliferations are present, and these are also occa^anally developed
^juJUL. 'rur3,m^
/?%
from the surface. They are usually small, with a short stalk and a
small roundish leaf-like upper part 1-2 mm. broad.
Some smaller specimens collected at Dwarka and Okha Port
agree well with Kiitzing?s figure. The lobes reach a breadth of only
1-2 cm., their edges are very waved and they have few proliferations.
A transverse section of the thallus, which is about 70 ­jl thick,
shows that it consists at the periphery of a layer of densely placed
short assimilating cells and one or two layers of larger roundish ones
below. The medullary tissue is composed of thick-walled filaments
tightly woven together. The midrib develops through the division
of the cells of the cortical layer, which form short, dense, vertical
rows of cells.
In one of my specimens a few cystocarps were found. They
occurred in the small leaf-like part of the proliferations, immersed in
the medullary tissue (see Kylin in Lunds Univers. Arsskrift, Avd. 2,
Bd. xxi., 1925, p. 20, fig. 8). The cluster of carpospores forms
roundish clumps and the ripe carpospores escape through a small
ostiole.
NEW YORK
BOTANICAL
GARDEN
\J	det. F. Bergesen.
Herbarium of The University of Michigan
Cryptonemia undulata Sonder
Determined by
fl, Wynne 3,fi i, 1988
new york
botanical
GARDEN
02174782