Cryptogramma acrostichoides in South Dakota

1 Pages·1995·0.7 MB·English

by  Robert D Dorn

AMERICAN FERN VOLUME NUMBER
64 JOUIiNAL:
85
2 (1995)
—
Cryptogramma On we
acrostichoides in South Dakota. 10 1994,
July dis-
covered an abundance Cryptogramma Squaw
of acrostichoides R. Br. in Creek
km
Canyon
about 6.5 west of Lead, Lawrence County, South Dakota. This
canyon numerous
has outcrops of igneous rock that contrast with the mostly
sedimentary formations found in the Black Plants were located on both
Hills.
and
canyon
the east- west-facing sides of the in crevices of the rock outcrops.
m
The
elevation ranges from about 1675 1770 (5500-5800 The popula-
to
ft).
tion has likely been overlooked because of the difficult accessibility on private
property. Vouchers {Darn 5733) have been deposited MO, RM, and SDU.
at
The
species found on non-sedimentary formations throughout most
is of the
western cordillera. The closest previously known location in the Big Horn
is
km
Mountains, Sheridan County, Wyoming, about 270 west.—Robert
the
to
WY
DoRN, Box
D. 1471, Cheyenne, 82003, and Richard Harner, 5721
F. S.
CO
Spotswood
80120.
Littleton,
St.,
Caribbean
taxonomic
treatment
from
from Cuba
lyzed, the (without Wright 870 [BM, MO]) and
first locality, C. the
second from
Puerto Rico (Aguas Blanner
Claras, [BM]). Recently, another
s.n.
from Cuba was
collection determined
as this species (Prov. Santiago de Cuba,
[HAC, and common
Caluffs.n. SP]) called to our attention that this taxon not
is
Cuba.
in In addition, the collector suggested that very unlikely
that this
is
it
species represents an escape from Cuba no
cultivation in evidence
as their
is
for its horticultural use on the island. As noted by Lowe and
{Ferns: British
Groombridge and
Sons, London,
1872). a
difficult
is
it
to cultivate.
known
Caribbean was
oreviouslv
made
Nova
in Hispaniola (Swartz,
plantarum
seu prodromus, M.
D. Holmiae, Stockholm, The
1788). earliest col-
Cuba
lection ft-om probably dates to 1822 (without Poeppig [MO]),
locality,
s.n.
but the Wright collection above formed
cited the basis for the published
first
reports fi-om the country
(Grisebach, Catalogus Plantarum Cubensium, W. En-
gelmann,
Leipzig, 1866; Sauvelle, Flora Cubana, Imp. "La Havana,
Antilla",
1873). Several recent pteridophyte
floras for various other portions of the Ca-
by
ribbean Proctor
(Flora of the Lesser Antilles 2:1-414, Ferns
1977;
of Ja-
Museum
maica, New
British (Natural London. Mem.
History), 1985; York
Bot.
Gard
mention
the
In Cuba, denticulata grows open
P. in places of secondary vegetation on
m
humid
The from
elevation. materials
are clearly var
delimitation Prado, Amer. Fern
in 83:131-134, Based on
1993). a survey of
J.
the and specimens major we
literature at herbaria, conclude coUec-
that the