Gymnosporia obbiadensis Chiov.

First published in Fl. Somala 1: 126 (1929)
This species is accepted
The native range of this species is Central Somalia. It is a subshrub and grows primarily in the desert or dry shrubland biome.

Descriptions

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Type
C1, “Obbia, Magangib”, Puccioni & Stefanini 375 (FT lecto.)
Morphology General Habit
Low spreading shrub at least 35 cm tall and up to 2 m wide, with spines up to 3 cm long
Morphology Branches
Branches ash-grey or sometimes brownish in young parts, terete, becoming fissured, without or with few pale lenticels, glabrous
Morphology Leaves
Leaves alternate, or subopposite on spines; petiole 1–1.5 mm long, purple to glaucous, glabrous; blade ash-coloured to glaucous, 4–17 x 3–10 mm, obovate to oblanceolate or lanceolate, abruptly acute to rounded at the apex, cuneate at the base, leathery, glabrous, with 2–4 lateral nerves equally prominent on both surfaces and indistinct reticulation, margin entire to slightly denticulate
Morphology Reproductive morphology Inflorescences
Cymes 4–13 mm long, dichasial to submonochasial, solitary, or 2 together, axillary, often borne on spines, glabrous; peduncle 1–4 mm long; pedicel 2–5 mm long, articulated at the base; flowers 3–10(–15) in each cyme, 2–4 mm wide, functionally unisexual
Morphology Reproductive morphology Flowers Calyx
Sepals 5, purplish to brown, c. 0.8 x 1 mm, ovate with ciliolate margin
Morphology Reproductive morphology Flowers Corolla
Petals 5, white or pale yellow, 1–2 x 0.8–1.25 mm, oblong to ovate, with entire to toothed margin
Morphology Reproductive morphology Flowers
Female flowers with 5 staminodes c. 0.75 mm long; disk as in male flowers; ovary 2-celled, globose to subconical, 1/4 (slightly) immersed in the disk; style shorter than the ovary, with 2-lobed stigma Male flowers with 5 stamens c. 1.3 mm long, filaments 1 mm long, slender, inserted at the base of the disk; disk 1.3–1.5 mm in diam., concave, 5-lobed; pistillode small, globose, 1/2 immersed in the disk; style very short with unlobed stigma
Morphology Reproductive morphology Fruits
Capsule purple to red, darker with age, globose, 3–3.5 mm long, leathery, smooth to wrinkled, glabrous
Morphology Reproductive morphology Seeds
Seeds 1–2, dark red or dark brown, c. 3 x 2 mm with a white aril obliquely covering 2/3 of the surface.
Distribution
C1 not known elsewhere.
Ecology
Open sandy areas. Altitude up to 300 m.
Note
This is closely related to the widespread M. senegalensis. In both species the ovaries and capsules are 2-celled, the disk concave and the aril investing up to 2/3 of the surface of the seed. M. obbiadensis, however, has smaller leaves and shorter petioles (as shown in the key) and also differs in its spreading habit, probably an adaptation to the habitats in which it occurs.
[FSOM]

Sources

  • Flora of Somalia

    • Flora of Somalia
    • http://creativecommons.org/licenses/by-nc-sa/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 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