1. Family: Malvaceae Juss.
    1. Genus: Pterygota Schott & Endl.
      1. Pterygota perrieri Hochr.

        This species is accepted, and its native range is E. Tanzania to Mozambique, Mayotte, Madagascar.

    [FTEA]

    Sterculiaceae, Martin Cheek & Laurence Dorr; Nesogordonia, Laurence Dorr, Lisa Barnett. Flora of Tropical East Africa. 2007

    Type
    Type: Madagascar, Iabohazo R. banks, Perrier 1395 (P, holo.; K!, iso.)
    Habit
    Tree 18–36 m tall, buttressed to 4.5 m high; flowering branchlets 3–4 mm diameter, glabrous when mature
    Leaves
    Leaf-blade of flowering branchlets digitately 3–5nerved, lanceolate, entire or obscurely 5-lobed, rarely shortly oblong, shallowly 5-lobed, 13.5–19 cm long, 8.5–13 cm wide, apex acute to rounded, base truncate or slightly cordate (on vegetative shoots larger, ovate, to 26 × 21 cm, base cordate, petiole 6–7.5 cm long, 3 mm diameter); both surfaces with inconspicuous, thinly scattered stellate hairs, domatia absent; petiole 4.5–6.5 cm long, 1–1.5 mm wide, glabrous with indumentum as blade when young, glabrescent
    Inflorescences
    Inflorescences axillary in the topmost nodes, indumentum denser than leaf-blade, puberulous, 2–4(–6) inflorescences per branch, each (2.5–)4–4.5 cm long, bearing ± 5 partial peduncles; bracts highly caducous, not seen; partial peduncle 1(–8) mm long, 1(–2)-flowered; pedicel 2 mm long
    Flowers
    Male flowers with outer indumentum as inflorescence, divided for 9/10, lobes oblong, 16–19 mm long, 2.5–3.5 mm wide, basal part saucer-shaped, 2 mm long, 5 mm wide, inner surface densely invested with a mixture of papillae and stellate hairs; androgynophore 7–9 mm long, lower third minutely puberulous, upper third glabrous, 0.5 mm diameter, base dilated, conical, apex with subcylindrical head of anthers 2.5 mm long, 2.5–4.5 mm wide. Female flowers as the male, androgynophore <1 mm, stamens forming a cylinder 4 mm diameter; carpels ovoid, 5 mm long, 2–2.5 mm wide, puberulous, styles slender, 4.5 mm long, revolute
    Male
    Male flowers with outer indumentum as inflorescence, divided for 9/10, lobes oblong, 16–19 mm long, 2.5–3.5 mm wide, basal part saucer-shaped, 2 mm long, 5 mm wide, inner surface densely invested with a mixture of papillae and stellate hairs; androgynophore 7–9 mm long, lower third minutely puberulous, upper third glabrous, 0.5 mm diameter, base dilated, conical, apex with subcylindrical head of anthers 2.5 mm long, 2.5–4.5 mm wide.
    Female
    Female flowers as the male, androgynophore <1 mm, stamens forming a cylinder 4 mm diameter; carpels ovoid, 5 mm long, 2–2.5 mm wide, puberulous, styles slender, 4.5 mm long, revolute
    Fruits
    Fruit with carpels ellipsoid, 7.5–8(–13) cm long, 7–8 cm wide, carpel wall 5–6 mm thick, outer surface indumentum as inflorescence.
    Seeds
    Seeds with embryo area highly wrinkled, wing deep brown, obovate to oblong, 6.5–7 cm long, 2.5–4.2 cm wide
    Figures
    Fig 7, p 51
    Ecology
    Riparian forest, sometimes on limestone; 0–400 m
    Conservation
    Six specimens are cited in the Flore de Madagascar, all from locations in the western half of the island. Despite numerous collection trips to Madagascar in the last 20 years by several institutes, no new specimens have come to light. In 2001 the taxon was discovered in Mayotte ( Pascal 717). In E Africa, ± 10 sites are known from almost as many specimens. The single specimen seen from Zanzibar ( Robins 93, K!) is sterile, therefore a degree of uncertainty attaches to its identification. The stronghold for this species appears to be T 3 where eight specimens from five districts are known. Where noted, specimens represent either single trees or a small grove of up to five individuals. Pterygota perrieri appears to be a timber species. This may constitute a threat to its survival. Threats at one site, Kwamgumi, have been recorded (Kew Bull. 57: 417, 2002) but are unknown at its other sites. On the basis of the data above, the taxon is here assessed as Near Threatened. Survey work is recommended to assess the conservation status of this species properly.
    Note
    The E African material has long been regarded as a possible new species but on the evidence available to me I am unable to distinguish it from P. perrieri, previously believed to be endemic to Madagascar. While the material in Madagascar tends to have more slender, 3nerved leaves than the E African material (usually 5-nerved), this is not clear cut. I have found no distinguishing characters in the flowers. Unfortunately I have not had access to fruiting material from Madagascar. Since fruit characters can be important at the species level in the genus, it may be necessary to reassess the taxonomic status of the E African material should these become accessible. The habitat of the E African and Malagasy material seems to be identical.
    Distribution
    Flora districts: T3 T8 Range: Zanzibar Range: Mozambique, Madagascar, Comores (Mayotte)

    Distribution

    Native to:

    Comoros, Madagascar, Mozambique, Tanzania

    Pterygota perrieri Hochr. appears in other Kew resources:

    First published in Candollea 3: 148 (1926)

    Accepted by

    • Cheek, M. & Dorr, L. (2007). Flora of Tropical East Africa, Sterculiaceae: 1-134.

    Literature

    Kew Backbone Distributions
    • Cheek, M. & Dorr, L. (2007). Flora of Tropical East Africa, Sterculiaceae: 1-134.
    Flora of Tropical East Africa
    • Fl. Madag. 131:18, t. 6 (1959).
    • Candollea 3: 148 (1926)

    Sources

    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 2019. 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 2019. 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