Polyalthia Blume 1830
| Main Authors: | Turner, Ian M., Utteridge, Timothy M. A. |
|---|---|
| Format: | info publication-taxonomictreatment |
| Terbitan: |
, 2016
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3850917 |
Daftar Isi:
- Key to the species of Polyalthia 1. Inflorescences cauliflorous, ramiflorous or axillary........................................................................... 2 – Inflorescences subopposite leaves..................................................................................................... 8 2. Flower pedicel 2–5(–7) mm long; petals narrowly linear (generally more than 10 times long as broad). Monocarps subsessile (stipes to 5 mm long)......................................................................... 3 – Flower pedicel (6–) 10–30 mm long; petals not narrowly linear (rarely to 10 times as long as broad). Monocarps stipitate (stipes 10 mm long or more)............................................................................... 6 3. Subshrub to 30 cm tall. Petals not exceeding 3 cm long....................................................... P. pumila – Tree to 6 m or more tall. Petals to 5 cm or more long........................................................................ 4 4. Petals 5 mm wide or more. Monocarps densely brown woolly hairy........................... P. cinnamomea – Petals 2–5 mm wide. Monocarps pubescent, becoming glabrous with maturity............................... 5 5. Inflorescences mostly on trunk and branches. Twigs persistently brown hairy. Sepals 15–17 mm long. Monocarps 2 cm wide........................................................................................... P. stenopetala – Inflorescences mostly among leaves. Twigs becoming glabous with age. Sepals 7 mm long. Monocarps less than 1 cm wide................................................................................... P. angustissima 6. Inflorescences mostly cauliflorous, or if among leaves then pedicel generally 20 mm long or more............................................................................................................................................... P. cauliflora – Inforescences not cauliflorous, flower pedicel to 12 mm long.......................................................... 7 7. Leaves drying grey. Flower pedicel more than 1 mm wide, widening distally; petals 2–5 cm long. Monocarps more or less cylindrical, 6–7 mm diameter; stipe c. 1 mm diameter................. P. lateritia – Leaves drying brown or grey-brown. Flower pedicel c. 0.5 mm wide; petals less than 1 cm long. Monocarps more or less globose, c. 15 mm diameter; stipe c. 2 mm diameter..................... P. obliqua 8. Leaves with many lateral nerves (at least 18 pairs); lamina bullate.................................................. 9 – Leaves with up to 17 pairs of lateral nerves; lamina not bullate...................................................... 10 9. Twigs villose. Base of leaf auriculate or cordate, often extending below twig..................... P. bullata – Twigs glabrous or hairy, not villose. Base of leaf not auriculate or cordate, never extending below twig............................................................................... P. pakdin I.M.Turner & Utteridge sp. nov. 10. Leaves narrowly elliptic or lanceolate to 2.5 cm wide, apex long acuminate..................... P. dumosa – Leaves generally more than 2.5 cm wide, apex not long acuminate............................................... 11 11. Leaf apex obtuse. Branchlets with thick corky bark. Flower pedicel slender (5–25 mm long, <1 mm thick)................................................................................................................................. P. suberosa – Leaf apex generally acute to acuminate. Branchlets not corky-barked. Flower pedicels generally shorter and/or thicker....................................................................................................................... 12 12. Flowers subsessile (pedicel to 2 mm long)..................................................................................... 13 – Flowers distinctly pedicellate (pedicel 5 mm long or more)........................................................... 14 13. Leaves glabrous; elliptic-lanceolate; apex blunt. Petals coriaceous, fleshy...................... P. parviflora – Leaves pubescent beneath; lanceolate; acuminate. Petals thin.......................................... P. hirtifolia 14. Twigs, leaf undersides, flowers and fruits furry.......................................................... P. chrysotricha – Twigs, leaf undersides, flowers and fruits glabrous or hairy but not all furry.................................. 15 15. Leaves generally with 10 or fewer pairs of lateral nerves. Flower pedicel to 5 mm long. Monocarps to 6, stipe shorter than seed-bearing portion................................................................ P. brunneifolia – Leaves with 12 or more pairs of lateral nerves. Flower pedicel 5 mm or more long. Monocarps 10 or more, stipe generally longer than seed-bearing portion.................................................................. 16 16. Petals relatively thin; sparsely hairy outside. Stipe of monocarps c. 0.5 mm thick................. P. socia – Petals relatively thick and leathery; densely hairy outside. Stipe of monocarps c. 1 mm thick...... 17 17. Pedicel 3–6 cm long.......................................................................................................... P. oblonga – Pedicel to 1 cm long....................................................................................................... P. motleyana
- Published as part of Turner, Ian M. & Utteridge, Timothy M. A., 2016, Whither Polyalthia (Annonaceae) in Peninsular Malaysia? Synopses of Huberantha, Maasia, Monoon and Polyalthia s. s., pp. 1-26 in European Journal of Taxonomy 183 on pages 12-13, DOI: 10.5852/ejt.2016.183, http://zenodo.org/record/3833125