Illigera luzonensis
Description
Leaves: petiole 4-12 cm, petiolules 0.5-3 cm, glabrous or velutinous; leaflets thinly chartaceous or chartaceous, (sub)orbicular, or ovate, 4-13 by 3-10.5 cm, acute or with an 0.5-1 cm long acumen, base truncate, cordate, or cuneate, the upper surface drying (blackish) brown, the lower surface conspicuously paler, both surfaces glabrous or (sparsely) hairy, especially the midrib; domatia sometimes present; lateral nerves 3-5 pairs, at angles of c. 30° with the midrib; leaflets of flowering lateral shoots smaller, 4-7 by 2.5-5.5 cm, ovate or suborbicular with base almost rounded (rarely subcune- ate).
Flower buds ovoid or ellipsoid, (5-)8 mm long.
Fruits with 2 large wings and with (one or) two obsolete wings or ridges; nut 1.5-3.5 cm long, wings variable, hemi-orbicular or sublingulate, longer wings 1.5-2.5 cm long, shorter ones 0.5(-l) cm long.
Distribution
Asia-Temperate: Taiwan (Taiwan present), Asia-Tropical, Babuyan Is. present, Luzon present, Mindoro present, Palawan present, Samar present, southern Ryukyu Islands present
Taiwan and southern Ryukyu Islands; in Malesia: Philippines (Babuyan Is., Luzon, Palawan, Mindoro, Samar).
Morphology
The sterile collection PNH 19128 (Mindoro) is somewhat deviating, with both leaf surfaces with rather long hairs.
A remarkable character is the colour of the dried leaves: upper surface black-brown, lower surface contrastingly lighter. The comparatively rather large flowers are noteworthy.