Olinia huillensis subsp. discolor (Mildbr.) Sebola

First published in Kew Bull. 64: 112 (2009)
This subspecies is accepted
The native range of this subspecies is SW. Tanzania to S. Tropical Africa. It is a shrub and grows primarily in the seasonally dry tropical biome.

Descriptions

Sebola, R.J. & Balkwill, K. 2013. A monographic study of the Oliniaceae. Kew Bulletin 68: 419. https://doi.org/10.1007/s12225-013-9465-x

Type
Type: Tanzania, Iringa Province, Lupembe, Likanga-Bushes, Schlieben 20 (holotype BM!).
Morphology General Habit
Shrubs up to 2 m high
Morphology Stem
Stem and bark pale-grey branchlets grey
Morphology Leaves
Secondary veins conspicuous on abaxial surface Leaves broadly elliptic, 36 – 57 × 21 – 34 mm, base cuneate, symmetrical apex slightly notched to emarginate, distinctly discolorous margins slightly undulate, coriaceous, glabrous on both surfaces Primary veins slightly raised above
Morphology Leaves Petiole
Petiole short, sparsely pubescent above, up to 1.5 mm long
Morphology Reproductive morphology Inflorescences
Inflorescence units compact to slightly sparse axes thick, distinctly quadrangular
Morphology Reproductive morphology Inflorescences Bracts
Bracts leathery, caducous
Morphology Reproductive morphology Flowers
Flower 5-merous, glabrous
Morphology Reproductive morphology Flowers Pedicel
Pedicels glaucous, very short, 0.5 – 1 mm long
Morphology Reproductive morphology Flowers Hypanthium
Hypanthium narrow, longer than petals, up to 20 mm long
Morphology Reproductive morphology Flowers Calyx
Sepals as in subsp. burttdavii
Morphology Reproductive morphology Flowers Corolla
Petals broadly spathulate, narrower, than 3 × 3 mm
Morphology General Scales
Scales as in subsp. burttdavii
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens as for the genus
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary as for the genus style pubescent, short, up to 1.5 mm long stigma slightly globose to terete
Morphology Reproductive morphology Fruits
Fruit globose, pink.
Note
Olinia huillensis subsp. discolor can be distinguished from subsp. burttdavii by its leathery, broadly elliptic leaves with slightly recurved margins a short petiole (less than 1.5 mm long) and a hypanthium that is narrow, longer than petal lobes and up to 20 mm long. Olinia huillensis subsp. discolor differs from both the typical subsp. huillensis and subsp. burttdavii by having leaves that are leathery, dicolorous with an asymmetrical base bracts that are leathery and caducous. However, specimen Carmichael 324 has papery bracts (as in O. ruandensis where bracts are caducous) that are persistent.
Distribution
Occurs largely in Zambia, Nyika Plateau Malawi, north of Lake Malawi and in Tanzania, Mufindi and Ufipa Distrs. Also occurs in Zimbabwe, Chimanimani Mts and Mozambique, Manica and Tete provinces. Map 8.
Ecology
Occurs in forests, at forest margins and on windswept rocky outcrops alt. 1768 – 2250 m.
Conservation
This taxon is widely distributed in northwestern Malawi, western Tanzania, north eastern Zimbabwe and northern Mozambique. In addition, it appears to be common and is thus considered to be Least Concern (LC).
[KBu]

Sources

  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Bulletin

    • Kew Bulletin
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0