Steganotaenia araliacea Hochst.
  • Flora


Cite taxon page as 'WFO (2021): Steganotaenia araliacea Hochst. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000431247. Accessed on: 01 Mar 2021'

Morphology

Compound umbels of small, white flowers

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    A small, soft-wooded tree

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    Glabrous small tree (rarely a bush), 2–10(–12) m. tall, usually straggling and untidy with an irregularly spreading crown; trunk with soft, sappy, pale yellow wood and thick, corky grey-brown bark with papery peel and a green slash.

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    Calyx-teeth broadly deltoid, acute, ± 0.5 mm.

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    Petals creamy to yellow, roundish, ± 1–1.5 mm.

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    Leaves clustered at the tip of younger twigs and more scattered along some old wood, imparipinnate with 3–4 pairs of leaflets, narrowly or broadly oblong in outline, up to ± 45 × 25 cm.; leaflets broadly lanceolate to broadly ovate or almost round, the terminal similar to the laterals, ± 2–14 × 1.25–8 cm., acuminate, ± abruptly narrowed to a sessile or shortly (to ± 6 mm.) petiolulate base, regularly serrate with the teeth terminating in a fine bristly arista up to 3 mm. long, shorter aristae frequently also present between the teeth; sheaths broad, pale- and sometimes lacerate-margined, ± 6–10 mm., abruptly narrowed to the petiole, the base of the sheaths of the upper (clustered) leaves ± surrounding the twig and visible on previous years’ growth as circumferential scars; petiole ± 6–15 cm.

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    Flowers usually appearing before (sometimes with) the leaves; flowering branchlets in clusters of mostly ± 6–11 at the tips of young twigs, ± 6–15 cm. long, each branchlet usually with a pair of broad scarious bracts above the middle, from the axils of each of which may arise lateral (generally ♂) umbels; umbels polygamous, some compound inflorescences entirely hermaphrodite and fertile, or all ♂, or the central hermaphrodite and the outer ♂; peduncles ± 1.5–10 cm.; rays 10–25(–40), glabrous, (1.25–)2.25–8 cm.; involucre of 7–8 reflexed, lanceolate bracts ± 3–5 mm. long; partial umbels 10–50-flowered, pedicels 4–9 mm.; involucel of 3–5 lanceolate-oblong to linear bracteoles 1–2 mm. long.

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    Fruit compressed-obpyriform, 8–15 × 5–8 mm., pale-stramineous to whitish at maturity, broadly and shallowly emarginate at the apex; stylopodia almost obsolete, disk broad, immersed in the fruit apex when ripe; styles 1–1.5 mm., divergent, rather slender, exceeding the apical notch.

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    Fig. 39.

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    Vittae rudimentary to obsolete.

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    Carpophore entire lying in a groove in the otherwise flat inner surface of the mericarp.

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    Fruit 12–13 × 6–8 mm., usually narrowly obovate, very strongly dorsally compressed, with well-developed lateral wings as wide as the seed-containing part. Mericarps with 3 distinct dorsal ribs which may occasionally be slightly winged.

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    Flowers with greenish-white to yellow or purplish petals; calyx teeth obsolete; stylopodium depressed, forming a disk 2–2·5 mm. in diameter in fruit; styles 1·5 mm. long, divergent, short, slightly clubbed at the apex.

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    Inflorescence of 7–10 compound umbels on robust peduncles 6–17 cm. long, densely crowded at the apex of branches, with short membranous basal bracts. Peduncles often with up to 3 smaller lateral umbels in addition to the central one, and these may be composed of male flowers only. Main umbels with 8–15 robust rays of 3–4·5 cm. long. Bracts few, small, almost obsolete. Partial umbels with numerous fine rays of c. 5–7 mm. long; bracteoles few, membranous, very small and inconspicuous.

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    Leaflets 3·5–12 × 2–7 cm., in 3–4 pairs plus a terminal one, lanceolate to narrowly lanceolate, rarely nearly circular, borne on short petiolules or sessile. Apex narrowly acute with a prolonged stiff mucro, base rounded to subcuneate; margin regularly serrate, the tips of the teeth produced as long stiff bristles (similar bristles are sometimes also found on the side of the teeth).

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    Leaves 15–40 cm. long, simply pinnate, densely crowded at the ends of the shoots.

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    Small glabrous deciduous tree or shrub, from c. 2–10 m. high, with ascending branches; bark grey formed with a small rectangular pattern; upper stem corky, pale grey; leaves normally absent at flowering and fruiting times.

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    Glabrous small tree (rarely a bush), 2-10(-12) m tall, usually straggling and untidy with an irregularly spreading crown; trunk with soft, sappy, pale yellow wood and thick, corky grey-brown bark with papery peel and a green slash. Leaves clustered at the tip of younger twigs and more scattered along some old wood, imparipinnate with 3-4 pairs of leaflets, narrowly or broadly oblong in oudine, up to ±45 x 25 cm; leaflets broadly lanceolate to broadly ovate or almost round, the terminal similar to the laterals, ±2-14 x 1.25-8 cm, acuminate, ± abrupdy narrowed to a sessile or shortly (to ±6 mm) petiolulate base, regularly serrate with the teeth terminating in a fine bristly arista up to 3 mm long, shorter aristae frequendy also present between the teeth; sheaths broad, pale- and sometimes lacerate-margined, ±6-10 mm, abrupdy narrowed to the petiole, the base of the sheaths of the upper (clustered) leaves ± surrounding the twig and visible on previous years' growth as circumferential scars; petiole ±6-15 cm Flowers usually appearing before (sometimes with) the leaves; flowering branchlets in clusters of mostly ±6-11 at the tips of young twigs, ±6-15 cm long, each branchlet usually with a pair of broad scarious bracts above the middle, from the axils of each of which may arise lateral (generally male) umbels; umbels polygamous, some compound inflorescences entirely male and fertile, or all male, or the central male and the outer female; peduncles ±1.5-10 cm; rays 10-25(-40), glabrous, (1.25-)2.25-8 cm; involucre of 7-8 reflexed, lanceolate bracts ±3-5 mm long; partial umbels 10-50-flowered, pedicels 4-9 mm; involucel of 3-5 lanceolate-oblong to linear bracteoles 1-2 mm long. Calyx-teeth broadly deltoid, acute, ±0.5 mm Petals creamy to yellow, roundish, ±1-1.5 mm Fruit compressed-obpyriform, 8-15 x 5-8 mm, pale-stramineous to whitish at maturity, broadly and shallowly emarginate at the apex; stylopodia almost obsolete, disk broad, immersed in the fruit apex when ripe; styles 1-1.5 mm, divergent, rather slender, exceeding the apical notch.

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    Small deciduous tree or shrub, 2-10 m high. Leaves simply pinnate, densely crowded at end of shoots; leaflets ovate or lanceolate to narrowly lanceolate; apex acute with prolonged stiff mucro; margin regularly serrate, tips of teeth produced as long stiff bristles. Flowers greenish white to yellow or purplish.

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    Ecology

    In savannah.

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    Habitat

    Chiefly in rather dry situations, commonly as scattered individuals on rocky slopes and hilltops, walls of ravines and escarpments, in dry woodland, deciduous bushland, open grassland; sometimes planted as a hedge.

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    Open woodland and on riverbanks.

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    Distribution

    Very widespread in tropical Africa from Guinee to Ethiopia, southwards to northern South Africa.

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     Information From

    Apiaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Plants Of the World Online Portal - FWTA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • B The Trustees of the Royal Botanic Gardens, Kew
    Plants Of the World Online Portal - FTEA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • C
    e-Flora of South Africa
    e-Flora of South Africa. v1.21. 2018. South African National Biodiversity Institute. http://ipt.sanbi.org.za/iptsanbi/resource?r=flora_descriptions&v=1.21
    • D All Rights Reserved
    Plants Of the World Online Portal - FZ
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • E
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • F CC0 1.0 Universal (CC0 1.0).
    Global Tree Search
    https://tools.bgci.org/global_tree_search.php
    BGCI. 2018. GlobalTreeSearch online database. Botanic Gardens Conservation International. Richmond, U.K. Available at www.bgci.org. Accessed on 30/11/2018.
    • G Botanic Gardens Conservation International