Flora of Cameroon - Annonaceae Vol 45
Author
Couvreur, Thomas L. P.
https://orcid.org/0000-0002-8509-6587
IRD, DIADE, Univ Montpellier, Montpellier, France & Universite de Yaounde I, Ecole Normale Superieure, Departement des Sciences Biologiques, Laboratoire de Botanique systematique et d'Ecologie, B. P. 047, Yaounde, Cameroon & Naturalis Biodiversity Center, Botany Section, Darwinweg 2, 2333 CR Leiden, Netherlands
thomas.couvreur@ird.fr
Author
Dagallier, Leo-Paul M. J.
https://orcid.org/0000-0002-3270-1544
IRD, DIADE, Univ Montpellier, Montpellier, France
Author
Crozier, Francoise
IRD, DIADE, Univ Montpellier, Montpellier, France
Author
Ghogue, Jean-Paul
Universite de Yaounde I, Ecole Normale Superieure, Departement des Sciences Biologiques, Laboratoire de Botanique systematique et d'Ecologie, B. P. 047, Yaounde, Cameroon & Green Connexion, Environmental Group, siege face GP Melen, a cote de l'immeuble Palais des verres. Yaounde, Cameroun
Author
Hoekstra, Paul H.
Naturalis Biodiversity Center, Botany Section, Darwinweg 2, 2333 CR Leiden, Netherlands
Author
Kamdem, Narcisse G.
Universite de Yaounde I, Ecole Normale Superieure, Departement des Sciences Biologiques, Laboratoire de Botanique systematique et d'Ecologie, B. P. 047, Yaounde, Cameroon
Author
Johnson, David M.
https://orcid.org/0000-0003-2896-7419
Department of Botany-Microbiology, Ohio Wesleyan University, Delaware, OH, 43015, USA
Author
Murray, Nancy A.
Department of Botany-Microbiology, Ohio Wesleyan University, Delaware, OH, 43015, USA
Author
Sonke, Bonaventure
https://orcid.org/0000-0002-4310-3603
Universite de Yaounde I, Ecole Normale Superieure, Departement des Sciences Biologiques, Laboratoire de Botanique systematique et d'Ecologie, B. P. 047, Yaounde, Cameroon
text
PhytoKeys
2022
2022-09-20
207
1
532
http://dx.doi.org/10.3897/phytokeys.207.61432
journal article
http://dx.doi.org/10.3897/phytokeys.207.61432
1314-2003-207-1
29CD4EF8FB525DBAA022DF25CDB649C9
Uvariodendron fuscum var. giganteum (Engl.) Dagallier & Couvreur
comb. nov.
Figs 123
, 124
; Map 15F
≡ Uvariodendron giganteum
(Engl.) R.E.Fr., Acta Horti Berg. 10: 62, 1930;
Uvaria gigantea
Engl., Notizbl.
Konigl
. Bot. Gart. Berlin 2: 292, 1899;
Uva gigantea
(Engl.) Kuntze, Deutsche Bot. Monatsschr. 21: 173, 1903.
Type
.
Cameroon
.
Central Region
;
Yaounde
,
Zenker G.A.
&
Staudt A.
108
, 1895:
lectotype
designated by
Fries (1930)
, p. 62, sheet destroyed at B, sheet here designated: P[P00362654]; isolectotype: COI[COI00004926]
.
Description.
Differs from the type variety in having
young branches and petioles covered with long soft hairs producing a whitish appearance
quickly falling off (vs. young branches and petiole sparsely pubescent to glabrous); leaves
30-70 cm long and 8.2-22.5 cm wide
(vs. 15.9-45 cm long and 4.3-11.8 cm wide),
secondary veins 22 to 33
(vs. 15 to 24), and flowers with
sepals 21-30 mm long
(vs. 11-23 mm long);
carpels 33 to 104
(vs. 20 to 70).
Distribution.
From southern Nigeria to Gabon and Democratic Republic of the Congo; in Cameroon known from the East, South, Central and South-West regions.
Figure 123.
Uvariodendron fuscum var. giganteum
A
leaf
B
flower bud, side view
C
flower bud, side view
D
detail of receptacle, two outer and one inner petals removed
E
outer petal, outer view
F
inner petal, outer view
G
stamen
H
carpel, side view and detail of ovules
I
longitudinal section of receptacle
J
floral diagram
K
fruit, longitudinal sections of monocarps
A-K
from
Halle
3156
(as
U. giganteum
). Drawings by
Helene
Lamourdedieu, Publications Scientifiques du
Museum
national
d'Histoire
naturelle, Paris; modified from
Le Thomas (1969b
, pl. 50, p. 279).
Figure 124.
Uvariodendron fuscum var. giganteum
A
leaf, hand for size
B
detail of young branch, note pubescence of long whitish appressed hairs
C
base of leaf blade, lower side
D
base of leaf base, upper side
E
flower, side view
F
flower, top view
G
young fruit
A, C-G
Couvreur 1057
, Mt Cameroon
B
Couvreur 1206
,
Masea
, Cameroon. Photos Thomas L.P. Couvreur.
Habitat.
a common variety; in lowland or premontane primary or old secondary rain forests, on inundated soils or along streams or rivers. Altitude: 100-1300 m a.s.l.
Vernacular names (as assigned to
U. giganteum
): Obom,
ossoe
(
Yaounde
,
Biholong 279
), Limboto (Bakweri,
van Andel 3761
).
IUCN conservation status.
Least Concern (LC) (
Cheek 2014b
).
Uses in Cameroon.
None reported.
Notes.
This variety is more common and widespread than the type variety. Most of these characters provided above overlap with the type variety. Without the young branches covered with long soft hairs it can be hard to identify some specimens as var.
Uvariodendron giganteum giganteum
with certainty.
The specimen
Zenker G.A. & Staudt A. 108
, defined to be the type specimen by
Fries (1930)
, was not found in B (lost or destroyed), so we make the duplicate from P as the lectotype and the duplicate from COI as the isolectotype.
Selected specimens examined.
Central Region
:
Mont Mbam Minkon
on trail
5 km
from
Nkol Nyada village
,
3.96°N
,
11.40°E
,
21 March 2013
,
Couvreur T.L.P.
419 (WAG,YA);
Yaounde
,
3.87°N
,
11.52°E
,
1895
,
Zenker G.A.
108 (P);
Yaunde
,
3.86°N
,
11.51°E
,
Feburary
1895
,
Zenker G.A.
698 (K)
.
East Region
:
80 km
south of
Yokadouma
30 km
after
Ngato
15 km
after river ALPICAM 'base de
vie'
then
40 km
on forestry road starting
4 km
before
Masea
village
,
3.16°N
,
14.70°E
,
05 March 2019
,
Couvreur T.L.P.
1206 (MPU,WAG,YA);
66 km
south of
Yokadouma
30 km
after Ngato
15 km
after river ALPICAM 'base de
vie'
then
40 km
on forestry road starting
4 km
before
Masea
village
,
3.08°N
,
14.67°E
,
08 March 2019
,
Couvreur T.L.P.
1229 (MPU,WAG,YA)
.
South Region
:
Pres
d'Alati-Ancienne
piste
Alati-Mintom II
,
2.2°N
,
13.42°E
,
17 January 1973
,
Biholong M.
279 (P,YA);
Massif de Ngovayang village
de Atog Boga
,
3.22°N
,
10.50°E
,
04 September 2015
,
Droissart
V. 2125
(BRLU);
Bipindi
,
3.08°N
,
10.41°E
,
1898
,
Zenker G.A.
1438 (L)
.
South-West Region
:
Nyasoso village
on
max's
trail to
Mt
4.82°N
,
9.699°E
,
05 April 2016
,
Couvreur T.L.P.
1057 (WAG,YA); on trail from
Ekongo village
located
5 km
before the entrance to
Limbe
7 km
on secondary road
On
flank of
Mt Etinde
100 m
in
Mont
Cameroon
National Park
,
4.07°N
,
9.133°E
,
16 October 2013
,
Couvreur T.L.P.
512 (WAG,YA);
Bakossi Mountains
1-8 km
NNE of Menyum Village
,
5.05°N
,
9.612°E
,
22 May 1987
,
Doumenge C.
473 (L,P);
Ebondji
,
4.76°N
,
9.598°E
,
08 June 2017
,
Kamdem N.
557 (YA);
Forest
trail
2 km
south from
Etube-Tape village
,
4.85°N
,
9.7°E
,
02 February 1995
,
Lane P.
501 (K,WAG,YA);
Cameroon
Mountain
,
4.12°N
,
9.187°E
,
21 June 2001
,
van Andel T.R.
3761 (U,WAG)
.