A revision of Homalium sect. Odontolobus (Salicaceae) endemic to Madagascar
Author
Applequist, Wendy L.
text
Candollea
2018
2018-05-03
73
1
27
48
journal article
20703
10.15553/c2018v731a4
023dbe5b-0635-4a3b-b1dc-d8a7532c75cc
2235-3658
5722136
6b.
Homalium moniliforme
subsp.
littorale
Appleq.
,
subspec. nova
(
Fig. 3
).
Holotypus
:
MADAGASCAR
.
Prov. Fianarantsoa
:
Fiv. Farafangana
,
firaisam-pokontany Mahabo Mananivo
,
fkt. Nosy ala
,
forêt d’A[g]nalazaha
,
23°10’13’’S
47°43’27’’E
,
22 m
,
26.VII.2003
, fl.,
Rabehevitra et al
. 516
(MO-04810771!
;
iso-:
G
[
G00418523
] image seen,
P
[
P04705768
]!,
TEF
)
.
Homalium moniliforme subsp. littorale Appleq.
differs from
H. moniliforme H. Perrier subsp. moniliforme
in having young twigs moderately pubescent with minute trichomes (vs glabrous to glabrate or minutely papillate at apex), and leaves with the petiole
1-3 mm
(vs 2-7(-10) mm) and the blade usually narrowly elliptical to elliptical, (1.8-)2.7-4.7(-5.6) × 0.7-1.6(-1.9) cm.
Young
twigs
moderately pubescent with minute hairs.
Leaves:
petiole
1-3 mm
; blade narrowly elliptical to elliptical (oblanceolate especially when young), (1.8-)2.7-4.7(-5.6) × 0.7-1.6(-1.9) cm; margins serrulate to crenate-serrate or subentire; apex rounded-acute to rounded (slightly acuminate with rounded tip).
Vernacular names.
– “Fotsiakara”
(Ludovic et al. 870);
“Fotsiakara mainty”
(Ludovic 649);
“Fotsiakara minty”
(Ludovic et al. 696);
“Fotsikara minty”
(Ludovic 761);
“Hazontsindrano”
(Louvel 53). Uses. –
Wood is used for construction
(Ludovic et al. 696, 870).
Distribution, ecology and conservation status. –
Homalium moniliforme
subsp.
littorale
is native to littoral or low-elevation coastal forests from Toamasina to Toliara provinces; it is reported to occur on sand. Coastal forest, where not protected, is one of the most threatened habitat
types
in Madagascar. The habitat is in fact quite fragmented; three locations are within the protected area network (i.e., Mahabo/Agnalazaha, Mandena, and Ste. Luce) but continuing decline in habitat area and quality can be expected for the remainder. There are only seven distinct locations, three of which (from Tulear) are very close together. The EOO is estimated by GeoCAT as c.
10.5 km
2
, and the AOO as
56 km
2
. The preliminary assessment of conservation status suggests that a status of “Vulnerable” [VU B1ab(iii)+B2ab(iii)] would be appropriate, though one could argue for “Endangered” [EN] on the grounds that the habitat might be considered “severely fragmented.”
Paratypi
. –
MADAGASCAR
.
Prov. Fianarantsoa
:
Fkt. Vohimasy
,
forêt d’Agnalazaha
,
bloc Agnanto
,
23°10’09’’S
47°41’51’’E
,
28 m
,
23.III.2004
, fl.,
Ludovic
649
(
MO
)
;
Fkt. Nosiala
,
forêt d’Agnalazaha
,
bloc de Betaindambo
,
23°08’42’’S
47°42’18’’E
,
31 m
,
22.IV.2004
, fl.,
Ludovic
761
(
MO
)
;
Fkt. Nosiala
,
bloc forestier d’Ampandramadinika
,
23°12’13’’S
47°42’41’’E
,
21 m
,
8.IV.2004
, fl.,
Ludovic et al
. 696
(
MO
)
;
Nosiala
,
forêt d’Ampitavananima
,
23°11’10’’S
47°43’02’’E
,
30 m
,
5.VIII.2004
, fr.,
Ludovic et al
. 870
(
MO
)
;
MahaboMananivo
,
forêt de Mahabo
,
23°10’20’’S
47°42’23’’E
,
29 m
,
23.IX.2002
, fr.,
Rabenantoandro et al
. 961
(
MO
,
P
)
;
ibid. loco,
23°10’37’’S
47°43’E
,
10 m
,
25.IX.2002
, fl.,
Rabenantoandro et al
. 990
(
MO
,
P
)
;
Trail E of Vohimasy Ankorabe
,
W edge of Ampanasanay forest
,
23°10’56’’S
47°42’00’’E
,
24 m
,
19.VI.2004
, fr.,
A. Randrianasolo et al
. 853
(
MO
,
P
)
;
Mahabo-Mananivo
,
Sahalava
,
4 km
à l’E du gite MBG
,
23°11’27’’S
47°42’39’’E
,
4 m
, s.d., fl.,
Razafitsalama et al.
1004
(
G
,
MO
,
P
)
.
Prov. Toamasina
:
Fkt. Tanambao Ambodimanga
,
forêt de Menagisy
500 m
du village Antanandava Martin
,
16°47’S
49°43’E
,
26.V.2010
, fl.,
Lehavana
&
Zackarie
692
(
MO
)
;
Tampina
, s.d., fr.,
Louvel
53
(
P
)
;
Fénérive
,
forêt à Mahambo
,
12.VIII.1961
, fl.,
Peltier
&
Peltier
3419
(
P
)
;
Vohibola
,
à l’W de Tampina
,
12-14.VIII.1957
, fl.,
Service Forestier
18072
(
P
)
;
Mahambo
,
au S de Fénérive
,
30.VIII.1957
, fl. & fr.,
Service Forestier
18146
(
MO
,
P
[3 sheets])
.
Prov.Toliara
:
Mandena
,
24°57’S
47°02’E
,
10 m
,
13.I.1990
, fl.,
Dumetz
1184
(
MO
,
P
)
;
forêt au NE de la rivière Antorendrika avant Belavenona
,
24°52’S
47°07’E
,
0-20 m
,
22.III.1989
, fl.,
Rabevohitra et al.
1781
(
MO
,
P
)
;
Forest of Ste. Luce
(
Manafiafy
),
2 km
NW of Ambandrika village
,
24°46’S
47°12’E
,
0-10 m
,
9.VI.1994
, fl.,
A. Randrianasolo
343
(
MO
,
P
)
.