Polyspora Sweet

First published in News Lit. Fashion 2: 205 (1825)
This genus is accepted
The native range of this genus is Tropical & Subtropical Asia.

Descriptions

Timothy M. A. Utteridge and Laura V. S. Jennings (2022). Trees of New Guinea. Kew Publishing. Royal Botanic Gardens, Kew

Distribution
About 85 species in the Old World, found in tropical Africa and Asia from India to China, and southern Japan, and through Indo-China and Malesia to New Guinea; two species in New Guinea: Polyspora amboinensis (Miq.) Orel, Peter G. Wilson, Curry & Luu and P. papuana (Kobuski) Orel, Peter G. Wilson, Curry & Luu.
Morphology General Habit
Shrubs or trees to 35 m (in New Guinea). Leaves alternate, spirally arranged, simple, petiolate; leaf blade leathery, pinnately veined, margin crenate-serrate to entire
Morphology Reproductive morphology Flowers
Flowers solitary, axillary or extra-axillary; pedicel short; bracteoles 2(–3), caducous before flower matures leaving a scar on the pedicel; sepals (3–)5, unequal, persistent (in New Guinea); petals 5(–7), basally ±connate; stamens numerous, 50–120 (in New Guinea), filaments long, free except at the base and adnate to petals, anthers dorsifixed; ovary 3–5(–6), placentation axile, ovules 2–8 per locule; styles 3–6, partly fused
Morphology Reproductive morphology Fruits
Fruit a woody 3–6 angled capsule, loculicidally dehiscent leaving a central columella
Morphology Reproductive morphology Seeds
Seeds flat, apically with an oblong membranous wing.
Ecology
Polyspora papuana has been collected throughout New Guinea and New Ireland, and is found in lowland habitats from sea level to 2200 m in both primary and secondary forests.
Recognition
The species can be recognised by its habit being a large tree, the simple leaves with usually serrate margins, the solitary flowers with a pair of bracteoles soon falling from the pedicel and leaving a scar, the flowers which are usually white (rarely yellow or pink) and scented, and the woody capsular fruit with several flattened seeds in each locule. The leaves are spirally arranged and not longitudinally creased as in taxa previously included in Theaceae (e.g. especially conspicuous in Archboldiodendron in the Pentaphylacaceae).
[TONG]

Sources

  • Herbarium Catalogue Specimens

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Trees of New Guinea

    • Trees of New Guinea
    • http://creativecommons.org/licenses/by-nc-sa/3.0