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This genus is accepted, and its native range is NE. & E. Tropical Africa, Arabian Peninsula, Madagascar.
Hildebrandtia somalensis

[FSOM]

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

Morphology General Habit
Shrubs or shrublets, dioecious
Morphology Leaves
Leaves solitary or clustered on short shoots
Morphology Reproductive morphology Inflorescences
Flowers solitary or 2–4 together
Morphology Reproductive morphology Flowers
Female flowers pedicellate; sepals 4–5, unequal, the 2 or 3 outer ones larger than the 2 inner; corolla as in male flowers; ovary 2-celled with 2 ovules in each cell; styles 2, shorter than in male flowers, each with branched stigma; staminodes 4–5, 2 longer than the others Male flowers subsessile to pedicellate; sepals 4–5, subequal or unequal, usually 2 outer ones slightly larger than the others; corolla whitish, cream or greenish yellow, tubular, 4–5-lobed; stamens 4–5, 2 longer than the others; pistillode with 2 styles, each with a branched stigma
Morphology Reproductive morphology Fruits Fruiting calyx
Fruiting calyx with 2 or 3 outer segments enlarged, sometimes fused, adnate for 1–10 mm to the pedicel
Morphology Reproductive morphology Fruits
Capsule ovoid to globose, 4-valved, glabrous, 1–4-seeded
Morphology Reproductive morphology Seeds
Seeds trigonous-ovoid, finely reticulate.
Distribution
Genus of about 11 species, eight in tropical Africa and Arabia and two in Madagascar.

[FTEA]

Convolvulaceae, B. Verdcourt (East African Herbarium). Flora of Tropical East Africa. 1963

Morphology General Habit
Branched xerophytic shrubs with small alternate or fascicled leaves
Morphology Reproductive morphology Flowers
Flowers dioecious, 4–5(–6)-merous, axillary
Morphology Reproductive morphology Flowers Calyx
Sepals subequal in the ♂ flowers but in the ♀ flowers the outer 2–3 are larger and accrescent or if all sepals are accrescent then the outer ones are much larger
Morphology Reproductive morphology Flowers Corolla
Corolla small, funnel-shaped, several times longer than the calyx in ♂ flowers but only very slightly longer in ♀ flowers, 4–5-lobed
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers present but infertile in ♀ flowers
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary glabrous, 2-locular, 4-ovuled, present but sterile in ♂ flowers
Morphology Reproductive morphology Flowers Gynoecium Pistil
Styles 2; stigmas filiform, complicate, U-shaped with short lobes at intervals
Morphology Reproductive morphology Fruits
Capsule 2-locular, 4-valved, 1–4-seeded, enveloped in the membranous veined accrescent sepals
Morphology Reproductive morphology Seeds
Seeds trigonous, glabrous.

Native to:

Ethiopia, Kenya, Madagascar, Oman, Saudi Arabia, Somalia, Tanzania, Uganda, Yemen

Hildebrandtia Vatke appears in other Kew resources:

First published in Sitzungsber. Ges. Naturf. Freunde Berlin 1876: 7 (1876)

Accepted by

  • Baker, J.G. & A.B. Rendle in Thiselton-Dyer, W.T. et al. (eds.) (1905). Convolvulaceae Flora of Tropical Africa 4(2): 62-206. Secretary of State for the Colonies.
  • Deroin, T. (2001). Convolvulaceae Flore de Madagascar et des Comores (Plantes Vasculaires) 171: 11-287. Typographie Firmin-Didot et Cie., Paris.
  • Hedberg, I., Kelbessa, E., Edwards, S., Demissew, S. & Persson, E. (eds.) (2006). Flora of Ethiopia and Eritrea 5: 1-690. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • Sebsebe Demissew (1996). The genus Hildebrandtia (Convolvulaceae) from mainland Africa and Arabia Kew Bulletin 51: 525-541.
  • Thulin, M. et al. in Thulin, M. (ed.) (2006). Convolvulaceae Flora of Somalia 3: 221-258. The Royal Botanic Gardens, Kew.
  • Verdcourt, B. (1963). Convolvulaceae Flora of Tropical East Africa: 1-161.

Literature

Flora of Somalia

  • Flora Somalia, Vol 3, (2006) Author: by Sebsebe Demissew [updated by M. Thulin 2008]
  • Sebsebe Demissew in Kew Bull. 51: 525–541 (1996).

Flora of Tropical East Africa

  • J.B. 14 : 313 (1876)
  • Verdc. in K.B. 15 : 1 (1961)
  • in Monatsb. Acad. Berlin 1876 : 864 (1877)
  • in S.B. Ges. naturf. Fr. Berlin 1876 : 7 (1876)

Flora of Somalia
Flora of Somalia
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0