NOMENCLATURAL NOTES IN NORTH AMERICAN POTENTILLA (ROSACEAE)

2008·7 MB·English

by  Barbara Ertter

NOMENCLATURAL NORTH
NOTES N AMERICAN
POTENIILLA
(ROSACEAE)
Barbara
Ertter
Curator of Western North American
Flora
and
University Jepson Herbaria
of
University California
USA,
Berkeley 94720-2465,
California
aho 83725-1 USA.
51
5,
volume (FN
For a forthcoming of Flora North America several nomenclatural notes, lectotypifications,
of A),
new name
and
a are required for Potentilla (Rosaceae); these are provided herewith.
Some names
overlooked
sectional in
Potentilla
I.
&
Subsequent
to the publication of Potentilla sect. Hippianae (Rydb.) Ertter Reveal (2007), a previously over-
names
looked source of validly published sectional has been encountered that supersedes Hippianae
sect.
and New
several other sections, at least as far as author attribution. In the key to Potentilla on page 255 of
&
Manual
Botany the Central Rocky Mountains (Coulter Nelson 1909), Nelson adopts several of Rydberg's
of of
unranked and them The
"groups" nomenclatural
explicitly refers to as sections. results are as follows:
&
New
Supinae
Potentilla sect. (Lehm.) A. Nelson in J.M. Coult. A. Nelson, Man. Bot. Centr. Rocky Mt.
255. 1909.
Basionym: Potentilla series Supinae Lehm., Revis. Potentill. 191. 1856.-Antedates Johnston's (Phytologia 57:297.
8,
Journal of the Botanical Research Institute of Texas 2(1)
U
9(1):669. 1904). Potentilla trib. Multifidae
-1.
from sensu
Segregates pensylvanica L. lato
Potentilla
II.
&
Hitchcock
Several frequently included within a broadly defined Potentilla pensylvanica L. (e.g.,
entities
FNA. The nomenclature
Cronquist 1961, McGregor 1986) will be recognized as distinct species in critical
new name
and
summarized with
briefly here, along a a lectotypification.
is
Potentilla pensylvanica Mant. 76 767. by Fernald (1935: 288) supersedes that of Sojak (1987: 298).
L. Pi. 1 Lectotypification
,
.
been
Excluded from synonymy is pensylvanica var. strigosa Pursh, since the homotypic P. strigosa (Pursh) Tratt. has lectotypified
P.
&
Potentilla lasiodonta Rydb., N. Amer. 22:351. 1908. An name KoUi Packer (Canad.J. Bot.
Fl. earlier for finitima
P.
Potentilla litoralis Rydb., Bull. Torrey Bot. Club 23:264. 1896. Type: CANADA. Prov. Quebec. Gaspe Co.: Sta. Anne des
&
been
and Rydb. have
(Lehm.) Watson, Douglas ex Hook. glabrata (Lehm.) Kohli Packer, glabrella
glabrata bipinnatifida var. P.
S. P.
Macoun, noted by Sojak (1996: 120).
belongs to the unrelated species ovina J.M. as
P.
nom.
ovium
Potentilla jepsonii Ertter, nov. Basionym: pensylvanica var. ovium Jepson, Fl. Calif. 2:184. 1936; P. litoralis var.
P.
2814
JEPS here designated the
overlapping range. Of the two sheets in the Jepson Herbarium of the type collection (Jepson 7307), is
83
Potentilla bipinnatifida Douglas ex Hook., Fl. Bor.-Amer. 1:188. 1 2. Sojak (2008) is proposing to conserve P.bipin-
exLindHBoLReg.
17:1412.
1831).
bimundorum bimmdomm
Odd. 141:195. 1974.
Potentilla Sojak, Cas. Nar. Mus., Prir. Sojak (1974) described
P.
and
concinna
Lectotypifications and identities of Potentilla nivea var. dissecta P. var. divisa
III.
was on
Watson Amer. Acad. Arts 8:559. 1873) described the basis of four
niveavax. (Proc.
Potentilla dissecta S.
Rocky America and Montana (368 Drummond; Douglas; Howard); and in
syntypes: "in the Mts. of British
When
he
Rydberg proposed concinna
Utah Watson, (1896b: 431) divisa n.
the Uintas, (335 in part)." "P. v.,"
and
synonymy and included the Douglas ("Rocky Mountains")
in part" in
cited nivea var. dissecta "at least
P.
Howard among specimens representing his concept of
syntypes the P.
("Montana") of nivea var. dissecta
P.
W.H.
Forwood,
The by Rydberg were "South Dakota: Jenney. 1875;
concinna other collections cited
var. divisa.
Macoun, 1895."
1887; P.A. Rydberg, nos. 672 and 673. 1892. Assiniboia: John no. 10,468,
Nomenclatural notes North American
Ertter, Potentilla 203
in
synonymy
Rydberg's
citation of Potentilla nivea var. dissecta in has led to the interpretation that the two
names
synonyms,
are nomenclatural with the epithet divisa superfluous at the varietal level Boivin
(e.g.,
&
1952, Hitchcock Cronquist 1961). This interpretation not supported, however, by Rydberg's use of "in
is
and some
part" his explicit citation of of Watson's syntypes to the exclusion of others. Rydberg (1896b)
preceded specimens with Watson
the citation of the statement that "Dr. included the three specimens
first
[actually only two, those by Douglas and Howard] cited below in his nivea but in every respect
dissecta,
P.
much
they are nearer concinna than nivea: As proof Rydberg had two mind, he
P. P. that distinct entities in
had synonymy
(1896a: 303) not only previously
cited P. nivea var. dissecta in the of P. nivea var. quinquefolia
Rydb., but in his subsequent 1898 monograph North American he
of Potentilleae, cited nivea var. dissecta
P.
synonymy
"in part" in the of both nivea (Bunge) Rydb. and concinna The Drum-
P. var. altaica var.
P. divisa.
mond
and Watson
syntypes of nivea which were excluded from concinna were
P. var. dissecta, P. var. divisa,
among
instead listed the specimens seen of nivea var. altaica, preceded by the statement that "Watson's
P.
specimens agree exactly with the figure of in Ledebour's and name
altiaca Illustrations, this the
P. [sic] is
only one available ." (Rydberg 1898: 87). This dual citation was repeated in Rydberg's 1908 revision, in
. .
which
Rydb. was and
divisa (Rydb.) raised to a species nipharga Rydb. replaced nivea
P. P. P. var. altaica.
With
and
the distinction of Potentilla nivea var. dissecta concinna var. divisa established, lectotypifica-
P.
tion and identity need to be determined for both entities. Rydberg's removal of the Douglas and Howard
Drummond
syntypes from only 368 and Watson 335
nivea var. dissecta leaves as candidates. Sojak has an-
P.
NY
Drummond
notated the sheet of 368 as lectotype of nivea var. dissecta; this choice herewith honored
P. is
and The
formalized. identity of the single small, one-flowered plant unfortunately ambiguous, with no
is
precise locality to aid identification; because of the subpalmate/subpinnate leaves and short columnar
style
mm),
(ca 1 is tentatively identified as saximontana Rydb.
P.
it
Of
the syntypes of Potentilla concinna var. divisa, first stage lectotypification has been already been effec-
tively accomplished by Holmgren's (1997: 100) statement that Douglas's collection from the Rocky Mountains
was
designated lectotype by Rydberg (N. Amer. 22:330. 1908). In that Rydberg only indicated that the
Fl.
Rocky
Mountains
were the type without Holmgren's
locality, actually citing a specific collection, statement
an
serves as inadvertent lectotypification, without designating which herbarium houses the This would
type.
GH
be 19535, annotated as holotype by B.C. Johnston and cited as such in his (1980:165) unpublished
dis-
Potentilla nivea L. var. dissecta S. Watson, Proc. Amer. Acad. Arts 8:559. 1873, not P dissecta Pursh.
Type:
concinna
Potentilla Richardson divisa Rydb., Torrey Club 23:431. 1896.
var. Bull. Bot. Rocky Mourn
Type:
Lectotypification of pseudosericea Rydb.
IV. Potentilla
Potentilla pseudosericea Rydb. (Mem. Dept. Bot. Columbia Coll. 2:98. 1898) was described on the basis of
three syntypes: "Nevada: Shockley, No. 592, 1888. Rocky Mountains: Nuttall; Fremont, No. 218, 1845-7."
As noted byjepson 592 from White Mountains Mono
(1936: Shockley actually the
184), of Co., California,
is
GH
GH
Of
not Nevada. the two Shockley annotated by Rydberg
collections in as pseudosericea
n.
"P. sp.,"
19583
is labeled in Watson's handwriting as originating in Esmeralda Co., Nevada, but with the caveat
S.
think—
(GH
"I ticket lost." The other 19584) bears an original label on which a printed "Esmeralda Co.,
W. Nevada" by Mono
is supplanted Shockley's handwritten "White Mts., Co., Calif., Aug. 19, 1888, W.H.
Shockley 592," confirming Nevada was indeed
that the erroneous.
citation
The name
Shockley syntype represents the species which the has been endemic
to traditionally applied,
and Nevada
s of California, possibly (unconfirmed). In contrast, the Nuttall
Journal of the Botanical Research Institute of Texas 2(1)
204
Hook. Rydberg
Douglas ex (1898) also
and Fremont syntypes belong an unrelated species, bipinnatifida
to P.
name synonymy and subsequently (Rydberg 1908: 348)
manuscript holosericea" in
"Potentilla
cited Nuttall's
specimen
Johnston annotate Nuttall's at
"Rocky Mountains" the type This led B.C. to
as locality.
specified
NY (GH an unpublished variety of
and annotate Shockley's "Nevada" syntype 19583) as P.
lectotype, to
as
lectotypiflcation
However, alone insufficient for
pensyhanica honoring the collector. citation of a locality is
W.
begins with Jepson's (1936: 184)
Note McNeill 2006), so that effective lectotypiflcation
et
(Art. 37.3, 2, al.
GH
19583
Mono 592" To complete the process,
type
"White Cal, Shockley as locality.
Mts., Co.,
citation of
herewith formally designated the lectotype of pseudosericea.
P.
is
Potentilla pseudosericea Rydb., Mem. Dept. Bot. Columbia Coll. 2:98. 1898. type: "Nevada. Esmekalda Co." [actu-
me
who provided loans used during the
have hosted or
acknowledgments due herbaria
are the
Special
MO,
MICH,
FNA GH,
(ALA, BM, BRY, CAS/DS, K, LE,
extended period preparing the treatment for E, F,
of
GH, NY, and
WTU),
NY, PR, RM, SRP, UC/JEPS, US, UTC, WIS, with special thanks to the curatorial staff of
and John
The and Kanchi Gandhi, Jim Reveal,
US advice of
type specimens. assistance
locating
for critical
shared
and John Packer generously
Sojak
nomenclatural
McNeill were essential in unraveling snarls. Jiri
am
and indebted
Zazvorka. also
by Adolf Ceska,
on Jan Kirschner,
expertise facilitated I
their Potentilla,
J.
FNA who
my
on have influenced the
and Dave Murray, collaborators Potentilla,
Jim Reveal, Reidar Elven,
to
from Lawrence Hediard
Support the
summarized here and served as sharp-eyed reviewers. R.
conclusions
acknowledged.
Herbarium
Fund ojthejepson gratefully
is
REFERENCES
4:89-93.
Phytologia
1952. Pugillus Potentillarum.
Boivin, B.
New American Book
Rocky Mountains.
and manual of botany of the central Co.,
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Coulter, J.M. A.
1
New
York.
Novon
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and Rosaceae, Potentilleae.
and Reveal 2007. sections, combinations, varieties in
J.L
Ertter. B.
17:315-325.
name
Pursh (Rosaceae).
and 2008. Proposal to reject the Potentilla dissecta
Murray, Reveal
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Ertter, R. J.L.
B.,
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57(3): in
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Wl
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B.C.
1
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\\\.
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1
bimundorum
novy
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Notes on group
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J. X. microphylla steno-
XI.
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P.
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Syst.
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XIV.
J. in Preslia
68:97-124.
name m
2008. Proposals conserve the
SojAk, to and
Potentilla bipinnatifida against normalis
J.
P. P.
name
the
stolonifera against sprengeliana (Rosaceae). Taxon
ined.
P. P.