Ulva stenophylla Setch. & N.L.Gardner

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AîîDëN
UNIV. CALIF, PUBL, EOT. VOL.
| SETCHELL-GARDNER | PLATE 24
1920]
Setchell-Gardner : Chlorophyceae
271
10. Ulva stenophylla S. and G.
Plate 21, fig. 2, and plate 24
Frond simple, linear-lanceolate, tapering abruptly at the base to
a very short, flattened, cimeate stipe, 5-8 dm. high, 5-10 cm. wide,
plane in the middle with undulate margins; membrane 60-110/x thick;
cells squarish in surface view, 14-20^ diam., 1.5-2 times as long as
the diameter in section, chromatophore a thin parietal layer, covering
a part or the whole of the cells; pyrenoids absent.
Growing on rocks in the lower littoral belt. Central California.
Setchell and Gardner, Pliyc. Cont. I, 1920, p. 282, pi. 26, fig. 2, and
plate 29.
The plants described under this name are quite distinct from the
other species of Ulva in shape, texture and anatomical details. They
are dark green, tough and harsh to the touch. The usually simple,
long, lanceolate shape serves to distinguish them from other species
at a glance.
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Fig. 2. A micro-photograph of a portion of the surface, showing the rounded
angles and relatively thick walls of the cells. X 442.
PLATE 24
Ulva stenophylla S. and G.
A photograph of a whole plant, the type. X 0.3.
NEW YORK BOTANICAL GARDEN
02140660
02140660