Bryopsis rhizophora M.Howe

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Plate 7. Bryopsis rhizophora
1. A single plant, natural size.

2 and 3. Apical parts of pinnae (branches of the first order).

4.	Apical portion of main axis.

5.	Base of plant.

6.	Branches of the second order, with short rhizoidal processes at base.

7-9. Bases of branches of the first order, 2-3 cm. above the base of the plant, showing

elongate rhizoidal processes.

10-13. Branches showing sporangium-like malformations, apparently due to an
endophyte, perhaps a Chytridiaceous fungus.

Figures 2-4 are enlarged 28 diameters; 5~9> 13 diameters; 10-13. 32 diameters.

Bryopsis rhizophora sp. nov.

Suberect, densely cespitose, irregularly branched, dark green,
dull (not nitent), 3-5 cm. high, from a matted base of branching
rhizoids; stipe 1-2 cm. long, mostly 300-650 n in diameter; main
axis percurrent, of about twice the diameter of the principal
branches; branches of two or sometimes three orders, opposite,
alternate, or irregularly few-ranked, subdistichous, subsecund, or
very irregularly grouped; branches of the first order fastigiate,
with long naked bases and subplumose or somewhat fasciculate-
racemose apices, or sparingly long-branched below, each of the
older (up to within 5-10 mm. of apex of main axis) bearing at its
base one or two finally much elongate and often furcate decurrent
or squarrose-recurved rhizoidal processes, of nearly equal diameter,
often giving the branch the appearance of being laterally adnate;
lower branches of the second order subfiliform, suberect or patent,
often curved, simple or subplumose-ramulose at apex, commonly
with a short decurrent rhizoidal process at base; apical ramuli
(branches of second or third order) erect or erecto-patent, long-
cylindric or subclavate, mostly 0.3-1.5 mm. long, 65-110 n in
diameter, lightly constricted at the base, the axis excurrent; older
ultimate ramuli becoming gametangia with little change in form;
scars from delapsed gametangia or ramuli wanting or very rare.
[Plate 6, figure A: plate 7.1

Bryopsis	39

“Abundant on rocks,” Pescadores Islands, region of Ancon,
Feb. 12, 1907, Coker 77 (type) and 80 p.p.

THE NEW YORK BOTANICAL GARDEN

MARINE ALGAE OF PERU, COLLECTED BY ROBERT E. COKER

Plate 6, figure A. Bryopsis rhizophora
Photograph of a dried specimen (Coker 77), natural size.

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THE NEW YORK BOTANICAL GARDEN

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