Ulva stenophylla Setch. & N.L.Gardner

Ulva stenophylla sp. nov.
Plate 2G, figure 2, and plate 29
Tliallo simplici, lineari-lanceolato, ad basim in stipitem brevissi-
muin, complanatum, cuneatum longo attenuato, 5-8 dm. longo, 5-10
cm. lato, medio piano, marginibus undulatis ; membrana 60-11 <V
crasso, cellulis e superficie quadrat is, 14—20^ diam. in sectione trans-
versali, 1.5-2-plo diam. longioribus ; chromatophoris tcnuibus, parie-
talibus, omnino aut partim cellulam tegentibus; pyrenoidibus nullis.
Frond simple, linear-lanceolate, tapering abruptly at the base to
a very short, flattened, cuneate stipe, 5-8 dm. high, 5-10 cm. wide,
plane in the middle with undulate margins; membrane 60-110/* 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 cell; pyrenoids absent.
Growing on rocks in the lower littoral belt. Central California.
Type no. 5415 (Herb. Univ. Calif., no. 98511), Setchell.
The plants described under this name are quite distinct from the
other species of Viva, in shape, in texture and in 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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UNIV. CALIF. PUBL. EOT, VOL, 7
I SETCHELL-GARDNER I PLATE 29
NEW YQ&K
BOTANICAL
GARDEN
Ulva stenophylla S. and G. VJLvJtL U,
Fig. 2. A microphotograph of a portion of the surface, showing the rounded
gles and relatively thick walls of the cells. X 442.
PLATE 29
Viva stenophylla S. and G.
A photograph of the whole plant, the type specimen. X 0.3.
Ulva stenophylla Setchell & Gardner,sp.nov.
Univ. Cai i f. Pubi. Bo t „7 : IX.282.pi.26#f.2.pi.29.8 J1 1920.
NEW YORK BOTANICAL GARDEN
Thallo simplici, lineari-lanceolato, ad basim in
stipitem brevissiraum complanatum, cuneatum longe atten-
uato, 5-8 dm. longo, 5-10 cm. lato, medio piano, margin-
ibus undulatis; membrana 60-110 ]i crasso, cellulis e
superficie quadratis, 14-20 diam. in seotione trans-
versali, 1.5-2-plo diam. longioribus; chromatophoris
tenuibus, parietalibus, omnino aut partim cellulam te-
gentibus; pyrenoidibus nullis.
Frond simple, linear-lanceolate, tapering abrupt-
ly at the base to a very short, flattened, cuneate
stipe, 5-8 dm. high, 5-10 cm. wide, plane in the middle
with undulate margins; membrane 60-110 y. thick; cells
squarish in surface view, 14-20 ji diam.,1.5-2 times as
long as the diameter in section, chromaUophore a thin,
parietal layer, covering a part or the whole of the cell;
pyrenoids absent.
Growing on rocks in the lower littoral belt. Central
California. Type no. 5445 (Herb. Univ. Calif.,no. 98511),
Setohell.
The plants described under this name are quite dis-
tinct from the other species of Ulva, in shape, in tex-
ture and in 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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02140659