Two new species of Diospyros (Ebenaceae) from New Guine
Author
Puglisi, C.
Royal Botanic Gardens, Kew, Richmond, Surrey TW 9 3 AE, England, UK.
c.puglisi@kew.org
Author
Jimbo, T.
Papua New Guinea National Herbarium, Papua New Guinea Forest Research Institute, PO Box 314, Lae, Papua New Guinea.
Author
Hagwood, A.
College of Humanities and Sciences, University of Montana, Missoula, MT 59812, USA.
text
Edinburgh Journal Of Botany
2022
2022-07-11
79
1
10
journal article
10.24823/EJB.2022.1879
685d3a9f-b0f7-4a6b-9d44-66c52a20967d
7374245
Diospyros multimaculata
C.Puglisi
,
sp. nov.
Diospyros multimaculata
is vegetatively most similar to
Diospyros rostrata
(Merr.) Bakh.
and
D. pulchra
Bakh. It
differs from the former in the fruit with a nearly smooth epicarp (markedly colliculate in
Diospyros rostrata
) and in lacking the pronounced apical projection, and from the latter in the trimerous calyx and the prolate to fusiform fruit (calyx tetramerous and fruit globose to oblate in
D. pulchra
). It also resembles
D. janowskyi
Bakh.
in the overall habit and fruit shape but differs in the conspicuously glandular and subcordate base of mature leaves (leaf base inconspicuously to not glandular and obtuse in
D. janowskyi
).
Diospyros multimaculata
is characterised by the large, mature leaves with subcordate base and acuminate apex; numerous dark glands at the leaf base and alongside the midrib; the hairy leaves; and the prolate to fusiform fruit subtended by a small, trimerous calyx.
–
Type:
Papua New Guinea
,
Sandaun
(
West Sepik
) Province,
Vanimo
District,
Ossima
,
30 m
a.s.l.,
30 i 1969
,
Streimann & Kairo
NGF 39283 (
holotype
K
[
K00618534
]
;
isotypes
E
[
E01014580
],
L
[
L.2667453
])
.
Figure 1
.
Small tree
6–8 m
tall; bark black, stems hairy.
Leaves
simple, alternate; petiole
6–8 mm
long, hairy, terete; lamina dark green above, paler beneath, ovate, elliptic or slightly obovate, 11–20 ×
3.5–8.5 cm
, base subcordate (obtuse to rounded in younger leaves), apex acuminate; indumentum simple on both sides, adaxially denser (although brittle and caducous) and more abundant along the midrib, abaxially also including T-shaped hairs on the lamina, young leaves with ciliate margin; black (at least in herbarium specimens) pitted glands along the midrib throughout its length, densely clustered at the leaf base and peculiarly visible on the adaxial side; on the adaxial side midrib raised at the base and then becoming sulcate, secondary veins flat or slightly raised, tertiary veins almost inconspicuous, on the abaxial side midrib raised throughout, secondary veins raised and visibly anastomosing near the margin in loops, tertiary veins raised and scalariform. Male inflorescences and flowers not seen. Remnants of female inflorescences axillary, to
2.5 cm
long, 4- to 10-flowered.
Flowers
not seen, reported as yellow for both sexes.
Fruiting calyx
very small, tube reduced, lobes 3, divided almost to base, broadly acute,
1–2 mm
long, spreading or slightly reflexed, hairy outside, glabrous inside.
Fruit
fleshy, prolate to fusiform, light green when immature, orange to red when ripe, sparsely hairy to nearly glabrous, 3.5–5.6 ×
2–2.5 cm
, acute at the base and acute at the apex, epicarp smooth to slightly irregular.
Seeds
up to 6, usually 5 or 6, dark brown, smooth.
Distribution
. New Guinea (
Figure 2
).
Habitat and ecology
. Lowland swampy or seasonally inundated primary forest, on clay soil.
Etymology
. This species is named after the numerous glands at the leaf base and throughout the lamina alongside the midrib.
Vernacular name
.
Usrapai
(Kemtuik [Kamtuk] language).
Other specimens examined
.
INDONESIA
.
Papua
Province
: Jayapura, Sekoli, South of Lake Sentani,
110 m
a.s.l.,
7 viii 1957
,
Kalkman
BW 3767 (
K
,
L
)
.
PAPUA NEW GUINEA
.
Sandaun
(
West Sepik
) Province
: Vanimo District, near Poar River,
30 m
a.s.l.,
22 vi 1975
,
Katik
LAE 62262 (
E
,
K
,
L
)
;
Madang
Province
: Wanang Village,
115 m
a.s.l.,
29 x 2008
,
Ctvrtecka
2971 (
K
)
;
Josephstaal FMA area,
160 m
a.s.l.,
5 viii 1999
,
Takeuchi
et al. 13764 (
K
,
L
)
.