Enteromorpha marchantiae Setch. & N.L.Gardner

BOTANICAft
GARDEN
Enteromorpha Marchantae Setchell & Gardner, sp.nov.
Proc.Galif.Acad.Sei.IV.12:716.pi.16.f.40-42. 13 My 1924
Fronds 4-7 cm. high, up to 1 cm. wide in widest
parts, tubular, more or less búllate, clavate, taper-
ing below to a delicate stipe, simple or with a few
branches like the main frond and with delicate pro-
liferations on the stipe; cells in the smooth parts
arranged more or less in longitudinal and in cross
rows, mostly square in surface view, 16-22 p. diam. ,
membrane 24-27 ]x thick; cell walls 2.5-3.5 ]x thick,
not thickened on the inside; chromatophore not fill-
ing the cell, mostly in the outer end of the cell.
Cast ashore at La Paz, Lower California. Type,
Marchant, no. 3, May.
In form this species seems most closely related
to forma clavata of E. intestinalis. It differs from
all of the forms of E. intestinalis in having a thin
wall on all sides of the cell, in having the cells
arranged more or less in longitudinal rows, and in
having the cells nearly cubical. The specimens are
very much smaller than typical f. clavata
02131781