Articles

Willughbeia angustifolia (Miq.) Markgr.

Willughbeia angustifolia (Miq.) Markgr.

Family

Thymelaeaceae

Synonyms

Willughbeia apiculata Miq., W. elmeri Merr., W. rufescens Dyer ex Hook.f.

Vernacular Names

Malaysia gerit-gerit.
Indonesia jotan (Batak), jantahan, langgitan (West Kalimantan).

Geographical Distributions

Willughbeia angustifolia is distributed from Thailand, Malaysia, Indonesia (Sumatra, Kalimantan, Buru), Brunei, Nicobar Islands.

Description

W. angustifolia is a woody climber, up to measure 60 m long, with smooth branchlets and it produces latex.

The leaves are arranged opposite. The petiole is up to measure 2 cm long. The blade is elliptical, ovate or oblong in shape, with a size of measure about 3-14 cm x 1-4 cm, 2-4 times as long as wide, rounded to wedge-shaped base and obtuse to acuminate apex.

The inflorescence is an axillary cyme (rarely a fascicle of 3), up to measure 2 cm long and with 5-19 flowers. The flowers are 5-merous, actinomorphic, bisexual and they are white to greenish in colour. The petal is tubular, inflated tube, up to measure 3 mm long and with up to measure 4.5 mm long lobes.

The fruit is a fleshy, spherical berry, with a size of measure about 2-10 cm in diametre, pale green, yellow, orange or reddish in colour  and indehiscent.

The seed is a compressed ovoid in shape, with a size of measure about 2 cm x 1 cm and with absent coma.

Ecology / Cultivation

W. angustifolia is rather variable in leaf shape, size and venation. Its small inflated corolla tube and short delicate inflorescence are rather distinctive.

Line Drawing / Photograph

Willughbeia_angustifolia

References

    1. Plant Resources of South-East Asia No. 18: Plants producing exudates.