Rubiaceae
Heinsia

Heinsia zanzibarica (Bojer) Verdc.

First published in Kew Bull. 35: 422 (1980)
This species is accepted
The native range of this species is Kenya to Mozambique. It is a shrub or tree and grows primarily in the seasonally dry tropical biome.

Descriptions

Rubiaceae, D.M.Bridson & B.Verdcourt. Flora Zambesiaca 5:3. 2003

Morphology General Habit
Straggling to erect shrub or small tree 1.5–4.5 m tall; young shoots densely covered with pale brown shaggy hairs about 2 mm long; older shoots glabrescent or glabrous, often somewhat fissured.
Morphology Leaves
Leaf blades 5–15 × 2.5–6 cm, elliptic, oblong-elliptic or sometimes slightly elliptic-oblanceolate, acuminate at the apex, cuneate to almost rounded at the base, hispidly hairy to glabrescent above, densely rather velvety hairy beneath but leaf surface clearly visible under a lens; petiole 2–6 mm long, densely hairy like the stems; stipules 0.6–1.3 cm long, divided to near the base into 2 subulate attenuate lobes, pilose.
Morphology Reproductive morphology Flowers
Flowers sweet-scented, mostly numerous in dense terminal cymose inflorescences; peduncle 1–2 cm long, secondary branches 0.5–1 cm long, pedicels very short, all densely hairy.
Morphology Reproductive morphology Inflorescences Bracts
Bracts filiform.
Morphology Reproductive morphology Flowers Calyx
Calyx tube turbinate, 2 mm long, densely hairy; lobes 5, leaf-like, 1.2 cm × 3–4.5 mm, including the claw 3–4.5 × 1 mm, pubescent.
Morphology Reproductive morphology Flowers Corolla
Corolla white with greenish tube; tube 2–3 cm long, slender, densely pale yellowish hairy at the throat and densely velvety hairy outside; lobes 4–5, 2.1–3.4(3.6) × 0.9–1.9(2.1) cm, elliptic to oblong-elliptic, caudate-acuminate at the apex, the tail being 4–5 mm long, hairy on midrib beneath and densely finely pubescent on both surfaces.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers situated slightly below the throat in short-styled flowers and about 5 mm below in long-styled flowers.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Tips of stigma arms exserted about 2 mm in long-styled flowers but style only about 1 cm long in short-styled flowers, stigma arms 2–2.5 mm long.
Morphology Reproductive morphology Fruits
Fruit dry, indehiscent, 6–9 × 7.5–9 × 7–7.5 mm, oblong-globose or globose, compressed laterally, bristly pilose.
Morphology Reproductive morphology Seeds
Seeds c. 1.5 mm long, irregularly oblong-angular, strongly reticulate.
[FZ]

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/179689/1587174

Conservation
NT - near threatened
[IUCN]

Rubiaceae, B. Verdcourt. Flora of Tropical East Africa. 1976

Morphology General Habit
Straggling to erect shrub or small tree 1.5–4.5 m. tall; young shoots densely covered with pale brown shaggy hairs ± 2 mm. long; older shoots glabrescent or glabrous, often somewhat fissured.
Morphology Leaves
Leaf-blades elliptic, oblong-elliptic or sometimes slightly elliptic-oblanceolate, 5–15 cm. long, 2.5–6 cm. wide, acuminate at the apex, cuneate to almost rounded at the base, hispidly hairy to glabrescent above, densely rather velvety hairy beneath but leaf-surface clearly visible under a lens; petiole 2–6 mm. long, densely hairy like the stems; stipules 0.6–1.3 cm. long, divided to near the base into 2 subulate attenuate lobes, pilose.
Morphology Reproductive morphology Flowers
Flowers sweetly scented, mostly numerous in dense terminal cymose inflorescences; peduncle 1–2 cm. long, secondary branches 0.5–1 cm. long, pedicels very short, all densely hairy; bracts filiform.
Morphology Reproductive morphology Flowers Calyx
Calyx-tube turbinate, 2 mm. long, densely hairy; lobes 5, leafy, 1.2 cm. long, 3–4.5 mm. wide, including the claw 3–4.5 mm. long, 1 mm. wide, pubescent.
Morphology Reproductive morphology Flowers Corolla
Corolla white with greenish tube; tube slender, 2–3 cm. long, densely pale yellowish hairy at the throat and densely velvety hairy outside; lobes elliptic to oblong-elliptic, 2.1–3.4 cm. long, 0.9–1.9 cm. wide, caudate-acuminate at the apex, the tail being 4–5 mm. long, hairy on midrib beneath and densely finely pubescent on both surfaces.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers situated slightly below the throat in short-styled flowers and ± 5 mm. below in long-styled flowers.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Tips of stigma-arms exserted ± 2 mm. in long-styled flowers but style only ± 1 cm. long in short-styled flowers; stigma-arms 2–2.5 mm. long.
Morphology Reproductive morphology Fruits
Fruit dry, indehiscent ± oblong-globose or globose, 6–9 mm. long, 7.5–9 mm. wide, 7–7.5 mm. thick, compressed laterally, bristly pilose.
Morphology Reproductive morphology Seeds
Seeds irregularly oblong-angular ±1.5 mm. long, strongly reticulate.
Figures
Fig. 73.
Habitat
Forest edges; 90–480(–700) m.
Distribution
K7 T3 T6 T8 Z
[FTEA]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • Flora Zambesiaca

    • Flora Zambesiaca
    • 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

  • Herbarium Catalogue Specimens

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

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • 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