Moderate-sized, rather robust homeophyllous root-climbing liane and
hammock-forming secondary hemiepiphyte 3 m. Eocaul not observed; stem
of juvenile shoot to 4 mm diam., sharply four-angled, minutely winged
along the angles, leaves rather scattered; stem of mature sterile
shoot to 8 mm diam., deep green, becoming black-brown with age, drying
dark green to almost black, weakly four-angled or slightly compressed-terete
in cross section, at first somewhat sparsely clothed with leaves,
later naked, naked portions with prominent, slightly stepped nodes
to 50 mm distant, stem of fertile shoot to 4 mm diam., mostly moderately
clothed with leaves, occasionally older portions naked for approximately
half their length, naked portions with prominent, stepped nodes to
30 mm distant; foraging shoot to 2 mm diam. with a few cataphylls
and reduced foliage-leaves at first but soon becoming naked with slightly
prominent nodes to 100 mm distant. Leaves when fresh deep green adaxially,
paler and slightly yellowish abaxially, drying dull olive green; petiole
20 50 x 10 20 mm, broadly winged, obovate-oblong, with
2 3 secondary veins and numerous veinlets per side, all veins
prominent, especially in dried material, base decurrent, apex truncate
to rounded or slightly auriculate; lamina 140 230 x 55
100 mm, ovate with 2 intramarginal veins per side, these arising from
the base and either reaching the leaf tip or merging into a prominent
submarginal collecting vein, all additional veins arising obliquely
from the midrib, remaining parallel with numerous veins arising from
them, base rounded, apex acuminate-mucronate. Flowering shoot much
abbreviated, arising from the middle and distal leaf axils of fertile
shoots, bearing a minute prophyll and up to seven 4 30 mm,
sequentially longer, cataphylls. Inflorescence solitary; peduncle
40 70 x 2 3 mm, robust, erect, tapering towards the
apex, deep purple; spathe 25 52 x 20 30 mm, ovate to
ovate-lanceolate, margins prominently inrolled, base slightly cordate
to decurrent, apex acute with a somewhat stout mucro, deep purple,
sometimes slightly greenish abaxially when fresh, drying almost black;
spadix stipitate; stipe 12 15 x c. 2 mm, terete in cross section,
deep purple; fertile portion 12 30 x 9 13 mm, ovoid
to clavate, yellow-green to off-white. Flowers c. 2 3mm diam.;
tepals 6, 4 x 1.3 mm, oblong-cymbiform, yellow-green to dirty white,
apex fornicate, triangular, truncate; stamens 1 4 x c. 0.5
mm, filaments strap-shaped, thecae 1 x 0.25 mm cream; ovary 5 x 1.75
mm, 3-locular, compressed angular-ellipsoid, yellow-green to dirty
white; stylar region truncate; stigma prominent, punctiform, purple.
Infructescence with 4 10 berries; fruit obclavate, 10
17.5 x 10 14 mm, green ripening through yellow to deep orange-red.
Seeds c. 5 8 mm diam., ellipsoid to compressed-globose.
4. Pothos grandis Buchet
ex P.C. Boyce & D.V. Nguyen Figs 4, 4a.
Buchet apud Gagnep. ex P.C. Boyce & D.V. Nguyen, Kew Bull. 50(4)
(1995) 754; P.H. HÈ, CâaycÀ Vi_tnam [Ill. Fl.
Vietnam in Vietnamese & English], 3(1) (1993) 421, pl.8255
[P. grandis Buchet apud Gagnep. in Lecomte, Fl. Gén. lIndo-Chine
6 (1942) 1088, nom.invalid., sine descr. Latin.] Type: Vietnam,
Hoa Binh, Kim Boi, June 1926, Colani 3002 (P! holo; P!, SAI! iso).
Habitat & Ecology On trees and cliffs in fragments
of very degraded lowland to lower hill evergreen forest on Karst limestone
formations. 75 250 m.
Vernacular name Co´m lênh la´buo´i
Notes The large sombre-coloured inflorescence, although
less eye-catching than, for example, P.
gigantipes, makes for a striking plant. Similar overall to
P. dzui but differing by the
ovoid to clavate spadix and by the spreading to slightly reflexed
To date P. grandis has only been recorded from Vietnam. However, the
he collection from Pac Mo, Lang Son province (Soviet-Vietnam Expedition
1137) was made close to the border with China and P. grandis is to
be expected in southern China.
Geographically representative selection of collections studied:
VIETNAM. Hanoi: Dong Ham, near Kien Khe, 14 May 1883 (fl.), Bon 2152a,b
(fl.) (P). Ha Tay: My Duc, Chua Huong, 28 May 1977, Nguyen Thi Nhan
HN 111 (fl.) (HN). Hoa Binh: Kim Boi, June 1926, Colani 3002 (fl.)
(type of Pothos grandis, P holo; P, SAI iso). Kon Tum: Dak
Glai, 29 March 1978, Tran Ding Ly 389 (fl.) (HN). Lang Son: Pac Mo,
23 March 1961, Soviet-Vietnam Expedition 1137 (fl.) (LE). Nghe An:
From Phu Qui to Kebon, Poilane 16565 (fl.) (P, SAI). Ninh Binh: Cuc
Phuong Nat. Park, 6 Jan. 1963, Nguyen Quo Chung HN 2130 (fl.) (HN).