Streblonema cokeri M.Howe

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Streblonema Cokeri sp. nov.

Forming more or less penicillate tufts 150-800 /x broad or
widely confluent, destitute of hairs; endophytic filaments mostly
50-400 \i long, 8-22 ju wide, often freely branched and usually
interwoven and closely coherent; exterior filaments mostly 0.3-1.8
mm. long, 13-25 \x wide, usually simple or branched at the base
only, commonly broadest near the middle and tapering gradually
to the apex and often also to the base, often more or less dimor-
phous, one set short and slender, the other longer and coarser;
cells 13-35 M long, mostly 1-2 times as long as broad; chromato-
phores rather few, irregularly discoid or somewhat ribbon-shaped,
commonly anastomosing and often confluent, occasionally numer-
ous and rather regularly discoid; plurilocufar “sporangia” di-
morphous, the-two forms on the same individual, terminal on the
shorter and rarely on the longer filaments, also lateral on the longer
filaments with 1- or 2-celled pedicels; microsporangia (antheridia?)
elongate-ovoid to conic-cylindric, 38-102 /x X 16-27 ¡jl, often
curved, subacute or obtuse, mostly 4-6 loculi in width, the loculi
2-4 fx in diameter; megasporangia (?) elongate-ovoid, fusiform or
filiform, 38-105 m X 11—14 ix, 1 ox 2 loculi in width, the loculi 5-11
n in diameter. [Plate ii, figures 1-7.]

On and in Codium tomentosum peruvianum, Islands of Lobos
de Afuera, March 27, 1907, Coker 14s p.p. (type); on and in

old and partially decayed thalli of Spatoglossum crispatum, same
locality, dale, and number; also, same locality and date, on and
in Prionitis decipiens and its parasite Lobocolax, Coker 144 p.p.

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BOTANICAL
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1-7. Streblonema Cokeri M. A. Howe

Plate ii, figures 1-7. Streblonema Cokeri

1.	A tuft of filaments on apex of peripheral utricle of Codium.

2.	Portion of a tuft showing basal branching, rhizoidal or endophytic filaments, etc.

3.	A filament, showing form of cells, two microsporangia, etc.

4.	An apical microsporangium, with a lateral supposed megasporangium below.

5.	Portion of filament showing chromatophores and two lateral sporangia, of which

the one on the right is supposed to be a microsporangium and that on the
left a megasporangium.

6.	A portion of a filament, showing form of cells and chromatophores.

7- A supposed megasporangium.

All of the figures are drawn from the type material on Codium (Coker 145 p.p.).
Figure 1 is enlarged 15 diameters; 2-5, 7, 345 diameters; 6, 390 diameters.

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The New York
copyright reserved Botanical Garden

Volume 15, Plate ii

BOT ANlc AL
¿EìéRDEN*,

Mem. Torrey Club

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THE NEW YORK BOTANICAL GARDEN x

MARINE ALGAE OF PERU, COLLECTED BY ROBERT E. COKER * ''TANlGAL

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