A NEW SPECIES OF MIRABILIS (NYCTAGINACEAE) FROM JALISCO, MEXICO

3 Pages·1993·1.3 MB·English

by  Alice Le Duc

NEW
A
OF (NYCTAGINACEAE)
SPECIES MIRABILIS
FROM
MEXICO
JALISCO,
DUG
ALICE LE
1
Department Botany
of
University Texas
of
TX
78713
U.S.A.
Austin.
ABSTRACT
A
new species, Mirabilis russdlii, belonging to the section Oxyhaphoicks, described and
is
common
known
illustrated. It is from two collection sites along the coast ofJalisco. It is rather
Autonoma
along the entry road to the Instituto de Biologia de la Universidad Nacional de
Mexico, Chamela, Mexico, in tropical deciduous vegetation.
RESUMEN
Se describe e ilustra una especie niieva, AVirahilis rnssdlii, perteneciente a la scccion Oxybcipbokks.
comun
Se conoce unicamente de dos colectas a lo largo de costa de Jalisco. Es en el camino de
entrada a la estacion biologia de la Universidad Nacional Autonoma de Mexico "Chamela, yj
Mexico, en bosques bajos caducitolios.
Mirabilis russellii Le Due, sp. nov. (Fig.
1).
Mirahili oliganthae (^i'^.TiA\) Macbride arete affinis sed anchocarpiis pubescentibus clavatis 5-
porcatisque
differt.
dm
Much 4-7
branched shrubby perennial, high, branches glandularly
cm
Mid-stem 3-5
pubescent to glabrous, the nodes only sliglitly swollen. leaves
cm cm
1-2
long, 2.5-3.5 wide, petioles slender long; blades puberulent, broadly
to narrowly ovate, cordate or slightly truncate at the bcxse, the apex acuminate, the
margin entire, sparsely ciliolate. Involucres solitary or in cymules, in the axiles of
mm
upperleavesorsometimesterminal;pedicels2— long, pubescent. Involucre
5
mm
7—10
one-flowered, slightly accrescent in age, narrowly campanulate, long,
glabrous or slightly glandular pubescent, the lobes narrowly triangular, as long
cm
or longer than the tube, margin ciliolate. Perianth 1.5-2.5 long, pink,
mm
8-15 Stamens
expanded upwards, limb broad, the lobes obtuse. exserted
5,
mm
mm
4—8 beyond perianth. Pollen grains 0.11-0.12 in diameter.
ca.
mm mm
7-9
Anthocarp light brown, oblong-clavate, long, ca. 3 wide, 5-angled,
both and
the ridges tuberculate, scattered puberulent, constricted at base apex,
when
mucilaginous wet.
UN AM
MEXICO.
T^te: Jalisco: on the banks along the entrance road to the Biological Research
and
Station, Chamela, in tropical deciduous forest; vegetative specimen, material transplanted
^Present address: Department of Horticulture, Forestry and Recreation Resources, Kansas
KS
226 Waters Manhattan, 66506.
State University, Hall,
585-587.
SiDAl5(4): 1993
586
SiDA 1993
15(1):
t
cm
1
from
Fig. 1, Miyahilis VNssaUit the liolotypc-. Showini;: flowering stem and enlarged detail of
the anclioearp.
U
grown
in greenhotisc, with subsequent flowers attached, 10 Aug 1992, Due 2^0 (noLOTYPr:
UNAM,
TEX!;
be
isoTYPiiS: to distribtired).
MEXICO.
Additional specimens examined:
Jalisco: Man/.aniUo Ptierto VaUarta Road,
-
(MICH
Tomatlan, 15 Ecb 1975, MiVciKgh 263/7 Mpio. La Huerta, Estacion de Biologia
11.
);
Chamela (UNAM). Camino Nov
Eiurada, cera Estacion, 25 1981, 574 (NMU).
la Z:./ Lott
Known
from
Distr/b/n/ou. the coastal tropical deciduous of
forest Jalisco,
Mexico.
Le Due, Mirabilis 587
russellii
November March
Phenology. Flowering from to (or longer in the greenhouse).
Blooms open morning
in the only.
Monographic
studies o( Mirabilis section Mimbilis have revealed a heretofore
undescribed species^ Mirahilis placement in section Oxybaphoicks
russellii. Its lies
because of shrubby habit, involucres single-flowered and only slightly
its
when
accrescent in age, perianth campanulate, and anthocarps mucilaginous wet.
Within new
section Oxybaphoides this species appears to be related to the Mirabilis
M.
tenmloba S. Wats. - oligantha (Standi.) Macb. group because of the lanceolate
which However,
involucral lobes are at least as long as or longer than the tube.
the clavate, five ridges, and the pubescence of the anthocarp set Af russellii apart
.
from the other taxa of section Oxybaphoicks. These same anthocarp characters are
M.
similar to those exhibited by several taxa of the section Oxybaphus hirsuta
(i.e.,
MacM., M.pumila M. M.
(Pursh.) (Standi.) Standley, decumbens (Nutt.) Daniels,
(A. Gray) Heimerl. Mirabilis not placed in section Oxyba-
oblongifolia russellii is
phus, however, because the involucral and perianth morphology of this new
species firmly establishes close relationship with taxa of section Oxybaphoides.
its
my
named who
This species in honor of son Russell Jack has been so
is
my
supportive of graduate studies.
ACKNOWLEDGMENTS
am Guy Nesom
grateful to Luis Hernandez for the Spanish resumen and to
I
The
lor the Latin diagnosis. illustration provided by the author.
is