Berberis sanei Husain et al. (Berberidaceae), a new species from Arunachal Pradesh, India

5 Pages·1995·2.2 MB·English

by  T Husain

.
Berberis sanei Husain
et (Berberidaceae),
al.
new
a from Arunachal
species Pradesh, India
&
Garg Rao
Husain, B. Datt, A.
T. R. R.
A
Summary
new
species of Berberis L. from Arunachal Pradesh, India, describee
is
:
rium SEM.
as well as micromorphological studies through
Resume
Description d'une nouvelle espece de Berberis L. originaire de l'lnde
:
During
the course of a monographic study on the genus Berberis L. in India the authors detected
& LWG)
an
interesting specimen {Mehrotra Party 2439, wrongly Berberis
labelled as insignis
&
Hook.
f. Thorns, var. shergaonensis Ahrendt. Further, critical studies including the micromorpholo-
new
gical characters of leaf epidermis and pollen clearly established that this a species closely allied
is
to B. dasyclada Ahrendt, and same diagnosed and described
the here.
is
—
&
Berberis sanei Husain, Datt, Garg R. R. Rao, sp. nov. Fig.
1
rigic
•>inis
May
Pradesh, Bomdila, 3300 m, 5 1970,
Palit Hills, ca.
fl.
1
Habitat unknown shrub Stems yellow or yellow brown, often with warty hairs spines
(erect
?).
;
cm
3-fid, 1.7-2.3 long, Leaves 8-12.5 x 2.5-4.2 cm, elliptic to obovate-elliptic, apex ending into
stout.
a spine, base tapering, above distinctly white pruinose, dull, shining below, margins 13-18 spinose
;
mm mm mm
2-3
spines 1-1.5 long, up to 6 distant petioles long.
;
mm
Inflorescence up 13-flowered. Flowers yellow pedicels 13-15 long. Outer
fascicled, to
;
6-7 x 5-6 mm,
sepals 4-5 x 3-3.5 mm, obovate, obtuse, veins not distinct median and inner sepals
;
mm
obovate, obtuse. Petals 4.5-5 x 3-3.5 mm, obovate, obtuse, entire glands on petals 1.5-1 .75 long,
;
mm
mm
Ovary
lanceolate. Anthers long connective apiculate filaments 2 long. shortly stylose
1 ;
;
;
ovules 4-5.
Berries not seen.
D, petal with glands E,
; ;
—
—
71
&
The new
species is closely allied to Berberis dasyclada Ahrendt and to B. insignis Hook.
f.
A
Thorns, of the subsection Insignis Schneid. key to distinguish Indian species the subsection
all of" is
provided
below.
The
specific epithet is coined after Dr. V. Sane, a distinguished botanist and Director, NBRI,
P.
Lucknow.
Key
to Indian species of Berberis of the subsection Insignis
Stems
pubescent
anthers apiculate.
1
. ;
2. Stems yellow or yellow- brown spines 3-fid, rigid leaves distinctly white pruinose above, dull leaf
; ; ;
mm mm
serrations 1-1.5 long inflorescence up to 13-flowered pedicels 13 15 long B. sanei
; ;
mm
2'. Stems dark red usualh without spines loaves nitid above, leaf serrations 2-3 long inflorescence
; . :
mm
usually up to 6-flowered pedicels 6-12 long B. dasyclada
;
Stems
1 glabrous anthers obtuse or truncate.
'.
;
3. Petal
3'.
Petal
surtacc B.
.ul.m.,1
. .
,
= Mm
10 for A, B, E, F
MICROMORPHOLOGICAL
STUDIES
species was obtained through leaf epidermal and
/
upper epidermis papillose with convex periclinal cell walls
n B. sanei, the is
and inconspicuous boundaries. In B. dasydada, the periclinal cell walls on the upper epidermis are
cell
concave with prominent boundaries and without papillae. The arrangement of stomata on the lower
cell
epidermis also varies in two species, the former with partly clustered stomata and the latter with sto-
mata uniformly
scattered (Fig.
2).
—
below
Pollen morphology. Pollen morphological characters have been tabulated (Fig. 3).
Aperture
type
various
sometimes adjacent >erturate, spiral coils in
Basically 3-colpate, colpi long,
forming ections and turn tranversely to divide
or opposite rion)
col]
Sometimes
surface into cross-strips.
:
Margin
smooth.
heterogenous
granules
Membrane
smooth.
:,
Tips not well defined.
Surface
Finely reticulo-areolate (with n
Exine of varying
t
2.2 urn endoexin<
thick,
Shape and
size
56 x 52 |jm
Subspheroidal
Subspheroidal (prolate-spheroidal)
54-60 x 50-54
urn).
(range
67 x 61 urn (range 65-69 x 56-65 urn).
AMB
AMB circular oval.
circular angulate.
tectum distinctly
Grains tectate,