Volume 16 > Part 1 > Year 2022 > Page 28 > Annonaceae > Anaxagorea

1. Anaxagorea javanica Blumewfo-0000533461

Fl. Javae 2 (Anonaceae): 66, t. 32, 36A. 1830.— Xylopia javanica (Blume) Steud., Nomencl. Bot., ed. 2, 1: 84. 1840.

Accepted Name : This is currently accepted.

Description : Shrub to tree 2–8 m tall. Twigs greyish brown to brown, markedly to slightly angled in cross-section, sparsely hairy or glabrous. Leaves subcoriaceous to chartaceous, oblong, elliptic-oblong, elliptic, obovate or obovate-oblong, 8–20 cm by 3–8 cm, base slightly acute or rounded, apex obtuse to acuminate, the acumen 3–20 mm long, glabrous on both surfaces, midrib plane to slightly sunken above, secondary veins 6–12 per side; petioles 5–12 mm long, glabrous. Inflorescences terminal or leaf-opposed, 1–5-flowered, or plants cauliflorous, peduncles 3–10 mm long, pedicels 5–20 mm long; buds ovoid or globose. Sepals ovate or triangular-ovate, 4–6 mm long, obtuse to acute. Outer petals pale green to white, ovate-triangular or ovate, 12–25 mm by 8–14 mm, inner side varying from bifacial just below apex to bifacial or broadly keeled in upper third to upper half, slightly to strongly thickened toward apex, apex obtuse or acute, sparsely hairy to glabrous outside, glabrous inside. Inner petals present or absent (in var. tripetala), white, elliptic-rhomboid, 7–22 mm by 4–10 mm, inner side bifacial to broadly keeled in upper third, concave at middle part of inner side, apex acute to acuminate, glabrous on both surfaces. Stamens 37–88, spatulate, 2.5–4 mm long, plus 10–25 staminodes. Carpels 3–16, ovaries oblong or linear-oblong, 1.7–2 mm long. Fruit of 1–16 monocarps borne on a pedicel 10–20 mm long. Monocarps brown to blackish brown at maturity, 2.5–3.5 cm by 0.7–1 cm, persistent apical beak straight, 0.1–0.8 mm long, sometimes absent in var. tripetala, stipe 12–25 mm long, hairy. Seeds 1–2 per monocarp, obovoid, 10–13 mm by 6–8 mm.

Distribution : Peninsular Malaysia, Singapore, Java (type), Borneo.

Notes: A variable species in which two varieties are recognised, both occurring in Thailand. Most of the specimens from Peninsular Thailand belonging to Anaxagorea javanica var. javanica.