The taxonomic identity of Bauhinia bassacensis var. nicobarica (Leguminosae: Caesalpinioideae)
Author
Bandyopadhyay, Subir
Botanical Survey of India, Central National Herbarium, Howrah 711103, West Bengal, India.
text
Phytotaxa
2014
2014-05-26
170
3
219
220
http://dx.doi.org/10.11646/phytotaxa.170.3.8
journal article
5253
10.11646/phytotaxa.170.3.8
b04dfc27-81c7-4ace-a568-4c8eebdc1e9a
1179-3163
5139104
Phanera bassacensis
(Pierre ex Gagnepain) de
Wit (1956: 472)
.
Bauhinia bassacensis
Pierre ex
Gagnepain (1912: 168)
.
Type:—
Harmand
1540 (
lectotype
P
,
n.v.
).
Gagnepain (1912)
in the protologue of
B. bassacensis
cited ‘
Laos
: Attopeu,
mars 1877
, n° 1540 [
Harmand
]. Cochin-chine: Phu-quoc,
janvier 1874
, n° 1399 [
Pierre
]’ after the morphological description. de
Wit (1956)
cited
Harmand
1540 at
P
as the
lectotype
. Whereas,
Larsen & Larsen (1996)
cited
Harmand
1240 at
P
as the
holotype
but it was not cited in the protologue of
B. bassacensis
.
I
have seen a Harmand’s collection having the field number 1240 at
P
(00798474, image!) with the same locality and date of collection as given in the protologue. The other collections of
Harmand
1240 at
P
(00798475 image!) and
K
(000760864 image!) have been collected from Attopeu in 2/77.
B. bassacensis
Pierre ex Gagnep. var.
nicobarica
Tiwari
et al.
(2013: 13)
,
syn. nov.
Type
:—
INDIA
.
Andaman
&
Nicobar Islands
:
Great Nicobar Island
,
Campbell Bay
,
20.2.2013
,
16 m
,
K
. Ravikumar,
N
.
Balachandran
&
Umeshkumar Tiwari
115533
(
holotype
FRLH
image!; isotypes
FRLH
image!,
PBL
)
.
Prior to the publication of
Tiwari
et al.
(2013)
this species was known to occur in
Thailand
,
Cambodia
,
Laos
,
Vietnam
and Malay Peninsula (
Larsen & Larsen 1996
). In
var.
bassacensis
all the petals were known to be greenish yellow or two of them with purple blotch at tip whereas in
var.
backeri
de
Wit (1956: 473)
to be greenish yellow with purple veins and two or all of them with purple blotch at tip. In the present collection of
var.
nicobarica
,
Tiwari
et al.
(2013)
stated the petals to be creamish with purple-red veins. From the image of the flower given in the protologue the petals appear to me as light yellow with purple veins. There is no purple blotch at tip in any of the petals. Thus not much difference in the colour of the petals exists between the said varieties. The herbarium specimens of
var.
bassacensis
can easily be separated from
var.
backeri
by the length and pubescence of the filaments and colour of the flower buds (
Larsen & Larsen 1996
).
Larsen & Larsen (1996)
recorded the filaments in the former variety to be
1.5–2 cm
long and pubescent whereas in the latter
variety the
filaments were found to be
2.5–3.5 cm
long and glabrous or sparsely hairy at base. Further the buds in the former
variety are
brownish pubescent whereas in the latter
variety greyish
pubescent.