The Identity of Asplenium macilentum Kunze ex Klotzsch

2011·1 MB·English

by  Ledis Regalado Gabancho

Shorter Notes
The
Identity of Asplenium macilentum Kunze ex Klotzsch.—Asplenium
macilentum was first recognized by Kunze and validly published by Klotzsch
New
(Linnaea 20: 351. 1847), citing six syntypes. Morton and Lellinger (Mem.
York unknown
Bot. Gard. 15:18. 1966) designated a specimen of collector and
locality (Herb. Willd. 19890, B) as lectotype. This specimen consistent with
is
the protologue in the described elements for the identification of the species.
Moore
(Ind. Fil.: 115. 1859) regarded the epithet macilentum as a variety of
modern
In Floras for the Neotropics, this species has been considered as a
synonym New
Mem.
of a variety of A. auritum (Morton and York
Lellinger,
Gard.
Bot. 15:18. 1966) or as a distinct species (Proctor, Ferns of Jamaica: 381.
Adams,
1985; Flora Mesoamericana: 290-324. Smith Chiapas
1995). [Flora of
some
2:48. 1981) affirmed that plants identified in herbaria as A. macilentum
greatly resemble Asplenium monodon Liebm. He
also introduced the
criteria
number
of of spores per sporangium and morphology
of spores
to differentiate
A. auritum and A. monodon; 64 reniform spores per sporangium
characterize
A. auritum, while 32 globose spores per sporangium monodon.
typify A. After
a revision of the isosyntype (Moritz 183, from Venezuela, UC), Smith
(1981)
reported large globose spores for this specimen, which probably should be
monodon. He
referred to A. also found that another isosyntype [Schomburgk
from Guyana,
1168, UC), has small reniform consequently
spores, referable
to
New
A. auritum Mickel and Smith (Mem. York
s.s. Bot. Gard. 88:107. 2004)
further discussed the identity of A. macilentum and stated that since the spore
morphology
of the lectotype had not been studied, was "imprudent
still to
it
place the name".
Spores from the lectotype (Herb. Willd. 19890, B) were examined with the
SEM
Scanning
Electron Microscope 515
Phillips (15kw), in the Botanical
Museum
Garden and
Botanical of Berlin-Dahlem. Spores from specimen
this
proved have same
to the morphological ornamentation of A. auritum (Try on
and
Lugardon, Spores
of Pteridophyta: 545, Fig. 212. 22. 1991; Regalado and
Sanchez, Grana
41:111, Fig. 3 A, E. 2003): a psilo-lophate perispore with thin
ridges limiting lacunae of foveolate or perforate surface Mean values
(Fig. of
1).
measured
spore length along the major equatorial diameter of this specimen
were
^m,
(29-) 33.2 (-37.4) falling within the range 35.6 ^m)
((30-) (-47.5)
measured from nine Cuban specimens Asplenium
of auritum (unpublished
The removed
data). sporangium contained 44 spores, but the sporangium had
already opened. For Asplenium macilentum
reason, should be
this treated
under synonymy
the of A. auritum and not under A. monodon.
Asplenium
auritum
Sw., Bot. (Schrader) 1800 1801. TYPE:
52.
(2):
J.
JAMAICA,
[specimen].— Swartz by Morton and
n. (lectotype selected
s.
SHORTER NOTES
207
UPS
Lellinger 1966:18, R-450 Thunberg
isolectotypes: Herb. 24781,
S!;
24782).
=
Asplenium macilentum Kunze
ex Klotzsch, Linnaea 20: 351. 1847. TYPE:
[specimen].— and
Collector locality not stated (Lectotype selected by Morton
B-W
and
Lellinger, 1966:
18, 19890!).
=
Asplenium
auritum macilentum (Kunze Moore
var. ex Klotzsch) T. Ind.
Fil.
115. 1859.
am
Zimmer
grateful to Prof. Dr. Brigitte and Ms. Monica Liichow, from the
I
Museum
Botanical Garden and Botanical Berlin-Dahlem and Rosa
of
to Dr.
Rankin, from the Botanico Nacional, La Habana, Cuba,
Jardi'n for the pictures
and
counts from Asplenium
of spores the lectotype of macilentum.
also
I
my
extend appreciation to Dr. Alan R. Smith for his critical review of the
manuscript.—
Ledis Regalado Gabancho, Institute de Ecologia Sistematica,
y
Carretera de Varona kmSYz, Capdevila, Boyeros, La Habana CP 11900, La
19,
Habana, Cuba,
e-mail: [email protected].