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
Uvaria anisotricha (Le Thomas) Couvreur
,
comb. et stat. nov.
Figs 103
, 108
; Map 13B
≡ Uvaria poggei var. anisotricha
Le Thomas, Adansonia, ser. 2, 8, 2: 247, 1968.
Type
.
Gabon
.
Ogooue-Ivindo
;
Belinga
,
Halle
N.
&
Le Thomas A.
484
,
14 Aug 1966
:
holotype
: P[P00362742]
.
Description.
Liana, 5-20 m tall, d.b.h. unknown. Indumentum of stellate hairs; old leafless branches sparsely pubescent,
young foliate branches tomentose
. Leaves: petiole 2-4 mm long, 1-2 mm in diameter, tomentose, grooved, blade inserted on top of the petiole; blade 7-12 cm long, 3-5 cm wide, ovate, oblong or elliptic, apex acuminate, acumen 1-1.5 cm long,
base rounded to subcordate
, coriaceous,
below covered with a continuous persistent layer of small stellate hairs intermingled with larger stellate hairs
, above glabrous when young and old; midrib sunken or flat,
above densely pubescent
when young and old, below densely pubescent when young and old; secondary veins
18 to 20
pairs, glabrous above;
tertiary venation percurrent
. Individuals bisexual; inflorescences ramiflorous on young foliate branches or less often on old leafless branches, extra axillary. Flowers with 9 perianth parts in 3 whorls, 1 per inflorescence; pedicel 10-20 mm long,
2-3 mm in diameter
, tomentose; in fruit unknown; bracts 2, one basal and one towards the lower half of pedicel, basal bract 1-2 mm long, 1 mm wide, soon falling; upper bract unknown (soon falling?); sepals 3, valvate,
covering in bud, free
, 8-10 mm long, 8-10 mm wide, triangular, apex acute, base truncate, green to yellow, densely pubescent outside, densely pubescent inside, margins reflexed; petals free, sub equal; outer petals 3, 17-20 mm long, 10-15 mm wide, elliptic to suborbicular, apex obtuse to rounded, base truncate, light yellow, margins flat, pubescent outside, sparsely pubescent inside; inner petals 3, imbricate, 17-20 mm long, 10-15 mm wide, elliptic, apex obtuse to rounded, base truncate, light yellow, margins flat, tomentose outside, sparsely pubescent inside; stamens 150 to 200, in 8 to 9 rows, 2-3 mm long, oblong; connective discoid, sparsely pubescent; staminodes absent; carpels free, 27 to 32, ovary 4-5 mm long, stigma coiled, pubescent. Fruits unknown.
Figure 102.
Different type of hairs on lower side of leaf blades in Cameroonian
Uvaria
A
simple
B
stipitate stellate
C
short fasciculate
D
long fasciculate
E, F
minute stellate mixed with larger stellate
G
simple mixed with minute stellate. Drawings by
Helene
Lamourdedieu, Publications Scientifiques du
Museum
national
d'Histoire
naturelle, Paris; modified from
Le Thomas (1969b
, pl. 6, p. 51; pl. 8, p. 57; pl. 9, p. 63; pl. 13, p. 77).
Distribution.
A central African species, known from Gabon, Cameroon and Democratic Republic of Congo; in Cameroon only known from the South West region.
Habitat.
An uncommon species in Cameroon; mainly occurring in submontane or montane rain forests. Altitude 800-1300 m a.s.l.
Local and common names known in Cameroon.
None recorded.
IUCN conservation status.
Not evaluated.
Figure 103.
Uvaria angolensis
A
lower side of foliate branch
B
fruits
C
flower, top view, note reflexed petals and tongue shape stamen connectives.
Uvaria anisotricha
D
leaves, top view with a flower
E
close up of flower bud, note reflexed sepal margins
F
petals of flower (fallen on ground).
Uvaria comperei
(1/2)
G
leaf base, lower side
H
leaf base, upper side
I
flower
A, B
Bidault 3284
, Guinea
C
Mas 1301
, Guinea
D-F
Couvreur 959
, Rumpi Montains, Cameroon
G-I
Couvreur 893
, Gabon. Photos
A, B
Ehoarn Bidault. Tropicos.org, Missouri Botanical Garden
C
Cyrille Mas. Tropicos.org, Missouri Botanical Garden
D-I
Thomas L.P. Couvreur.
Uses in Cameroon.
None reported.
Notes.
Uvaria anisotricha
was first described under the name
Uvaria poggei var. anisotricha
by
Le Thomas (1968b)
distinguishing it from var.
Uvaria poggei poggei
by the presence of two layers of stellate hairs on the lower side of the leaf blades, one minute and another larger. Besides this character, and after close examination, we can add the following differences suggesting the status of species rather than simply a variety: In
U. anisotricha
the leaves are coriaceous, strongly discolorous, with two types of hairs on lower surface: short buff hairs fully covering the lower leaf surface mixed with sparser longer rufous hairs; and the flowering pedicels are thick (2-3 mm). In
U. poggei
the leaves are papyraceous, concolourous, with hairs all similar, sparse and not obscuring the surface and the flowering pedicels thin (1 mm).
Uvaria poggei
is also found in Cameroon but is restricted to the East region towards the border with the Central African Republic.
Uvaria anisotricha
belongs to a group of species in
Uvaria
with numerous secondary veins, generally more than 18 pairs and up to 25, whereas the rest of Cameroonian
Uvaria
have between 6 and 16 pairs of secondary veins. It resembles
U. baumannii
in this respect in addition to the presence of two layers of stellate hairs on the lower surface of the leaf blades, but differs by the flower buds being pyramidal in shape with the sepals free and reflexed at maturity, versus sepals completely fused and cylindrical in bud in
U. baumannii
(
Le Thomas 1968b
,
1969b
). Pyramidal flower buds with reflexed margins are also found in other species such as
U. poggei
and
U. klainei
, the latter only known from Gabon and differing by its larger leaves glabrous above (except for the midrib) and with a single layer of stipitate stellate hairs below and larger flowers.
Cheek and Cable (1998, p. 12) tentatively named
Tekwe 49
as
U. poggei
, but this specimen is
U. anisotricha
.
Specimens examined.
South-West Region
:
Monkey forest
descending to waterfall at
Ndip
,
5°N
,
9.7°E
,
20 January 1998
,
Cheek M.
8950 (K,YA);
Rumpi mountains
forest trail ca
5 km
after
Dikome Balue village
ca
40 km
north of
Kumba
,
4.93°N
,
9.239°E
,
10 January 2016
,
Couvreur T.L.P.
959 (WAG,YA); Kodmin,
5°N
,
9.666°E
,
16 November 1998
,
Gosline W.G.
147 (K,WAG,YA); Above
Upper Baondo
,
4.06°N
,
9.15°E
,
07 April 1992
,
Tekwe C.F.
49 (K,P,YA)
.