1. Family: Euphorbiaceae Juss.
    1. Genus: Pseudagrostistachys Pax & K.Hoffm.
      1. Pseudagrostistachys ugandensis (Hutch.) Pax & K.Hoffm.

        This species is accepted, and its native range is S. Uganda to Zambia.

    [FZ]

    Euphorbiaceae, A. Radcliffe-Smith. Flora Zambesiaca 9:4. 1996

    Habit
    A much-branched small tree up to 9 m tall, mostly glabrous; stem c. 20 cm d.b.h.
    Petiole
    Petioles 1–3 cm long, with a pair of small subulate semipersistent stipels and/or a pair of sessile discoid glands at their apices.
    Leaf lamina
    Leaf blades 15–30 × 6–11 cm, elliptic-oblong, very shortly obtusely acuminate at the apex, rounded or sometimes very shortly decurrent at the base, shallowly spinulose-denticulate on the margin, firmly chartaceous to thinly coriaceous, with a pair of sessile discoid glands on the upper surface at the base, drying reddish-brown beneath; lateral nerves in 16–25 pairs, the lower open, the upper looped, slightly prominent on leaf upper surface, prominent on leaf lower surface, tertiary nerves numerous and closely parallel, ± perpendicular to the lateral nerves, quaternary nerves reticulate.
    Leaf sheaths
    Stipular sheath terminal, 2–3 cm long, subulate, sharply acute, readily caducous.
    Inflorescences
    Inflorescences 1–3(7) cm long, axillary or sometimes borne on old wood, 2–3 or more per fascicle, not pedunculate; axis densely pubescent; bracts 2–3 mm long, broadly ovate, rounded, pubescent at the base, otherwise glabrous, chestnut-brown; bracteoles similar, but smaller and dorsally keeled.
    Flowers
    Male flowers fragrant; pedicels 0.5–1 cm long, partly or entirely pubescent, reddish; calyx lobes 3–5 × 1 mm, lanceolate, acute, pubescent outside at the apex, otherwise glabrous, becoming reflexed; petals 4–5 × 3–4 mm, elliptic-oblong to elliptic-obovate, ± rounded, glabrous, creamy-white; disk gland-mass glabrous or sparingly pubescent; stamens 42–55, filaments 3.5–5 mm long, anthers 0.5 mm long, white; pistillode (when present) 2 mm long, tripartite, pubescent. Female flowers: pedicels 0.8–1.2 cm long, evenly to densely pubescent; calyx ± as in the male; petals 4–5 × 4–5 mm, broadly ovate-suborbicular, somewhat erose; disk evenly pubescent; staminodes ± 20, 1.5 mm long; ovary 2 ×3 mm, depressed-globose, densely tomentose; styles 2 mm long.
    Male
    Male flowers fragrant; pedicels 0.5–1 cm long, partly or entirely pubescent, reddish; calyx lobes 3–5 × 1 mm, lanceolate, acute, pubescent outside at the apex, otherwise glabrous, becoming reflexed; petals 4–5 × 3–4 mm, elliptic-oblong to elliptic-obovate, ± rounded, glabrous, creamy-white; disk gland-mass glabrous or sparingly pubescent; stamens 42–55, filaments 3.5–5 mm long, anthers 0.5 mm long, white; pistillode (when present) 2 mm long, tripartite, pubescent.
    Female
    Female flowers: pedicels 0.8–1.2 cm long, evenly to densely pubescent; calyx ± as in the male; petals 4–5 × 4–5 mm, broadly ovate-suborbicular, somewhat erose; disk evenly pubescent; staminodes ± 20, 1.5 mm long; ovary 2 ×3 mm, depressed-globose, densely tomentose; styles 2 mm long.
    Fruits
    Fruit 1.5–1.8 × 2–2.3 cm, depressed 3-lobed to subglobose, densely tomentose and intermixed with longer hairs, dull reddish-brown; columella 7–9 mm long.
    Seeds
    Seeds 8–10 × 7–8 × 7–8 mm, transversely ovoid-subglobose, smooth, slightly shiny, brownish, streaked with darker brown.
    [FTEA]

    Euphorbiaceae, A. R.-Smith. Flora of Tropical East Africa. 1987

    Habit
    A small tree ± 6 m. tall with straggling branches.
    Twigs
    Twigs lenticellate.
    Shoots
    Young shoots, petioles and stipules glabrous.
    Leaves
    Petioles 1–7 cm. long, with a pair of small subulate stipels and/or a pair of sessile discoid glands at their apices; leaf-blades oblong, elliptic-oblong, elliptic or elliptic-oblanceolate, (17–)25–45(–55) cm. long, (8–)12–20(–26) cm. wide, shortly obtusely acuminate, rounded-cuneate, rounded, truncate or shallowly cordate, shallowly and rather remotely serrulate or denticulate to subentire, firmly chartaceous to thinly coriaceous, with a pair of sessile discoid glands above at the base, lateral nerves 16–25 pairs, the proximal camptodromous, the distal brochidodromous, fairly prominent above and beneath, tertiary nerves numerous and closely parallel, ± perpendicular to the laterals, quaternary nerves reticulate, glabrous above and beneath, dark green above, paler beneath.
    Stipules
    Stipular sheath terminal, subulate, 2.5–5 cm. long, sharply acute, readily caducous.
    Inflorescences
    Inflorescences axillary or sometimes cauliflorus, 2–3 or more per fascicle, not pedunculate, up to 7 cm. long but more commonly 1–3 cm. long; axis densely pubescent; bracts broadly ovate, 2–3 mm. long, rounded, pubescent at the base, otherwise glabrous, chestnut-brown; bracteoles resembling the bracts, but dorsally keeled and smaller.
    Male
    Male flowers fragrant; pedicels 0.6–1.2 cm. long, pubescent below the articulation and otherwise glabrous or else entirely pubescent, reddish; calyx-lobes lanceolate, 3–5 mm. long, 1 mm. wide, acute, pubescent without at the apex, otherwise glabrous, becoming reflexed; petals elliptic-oblong to elliptic-obovate, 4–5 mm. long, 3–4 mm wide, ± rounded, glabrous, creamy or white; disc gland-mass glabrous or sparingly pubescent; stamens 42–55, filaments 3.5–5 mm. long, anthers 0.5 mm. long, white; pistillode (when present) tripartite, 2 mm. long, pubescent, usually 0.
    Flowers
    Female flowers:pedicels 0.8–1.2 cm. long, evenly to densely pubescent; calyx-lobes ± as in the ♂ flowers; petals broadly ovate to suborbicular, 4–5 mm. long and wide, somewhat erose; disc evenly pubescent; staminodes ± 20, 1.5 mm. long; ovary depressed-subglobose, 2 mm. long, 3 mm. diameter, densely tomentose, pale green; styles 2 mm. long. Male flowers fragrant; pedicels 0.6–1.2 cm. long, pubescent below the articulation and otherwise glabrous or else entirely pubescent, reddish; calyx-lobes lanceolate, 3–5 mm. long, 1 mm. wide, acute, pubescent without at the apex, otherwise glabrous, becoming reflexed; petals elliptic-oblong to elliptic-obovate, 4–5 mm. long, 3–4 mm wide, ± rounded, glabrous, creamy or white; disc gland-mass glabrous or sparingly pubescent; stamens 42–55, filaments 3.5–5 mm. long, anthers 0.5 mm. long, white; pistillode (when present) tripartite, 2 mm. long, pubescent, usually 0.
    Female
    Female flowers:pedicels 0.8–1.2 cm. long, evenly to densely pubescent; calyx-lobes ± as in the ♂ flowers; petals broadly ovate to suborbicular, 4–5 mm. long and wide, somewhat erose; disc evenly pubescent; staminodes ± 20, 1.5 mm. long; ovary depressed-subglobose, 2 mm. long, 3 mm. diameter, densely tomentose, pale green; styles 2 mm. long.
    Fruits
    Fruit depressed trilobate-subglobose, 1.5–1.8 cm. long, 2–2.3 cm. diameter, densely tomentose with an admixture of longer hairs in the tomentum, dull reddish brown. Columella 7–9 mm. long.
    Seeds
    Seeds transverse- ly ovoid-subglobose, 7–8 mm. long and deep, 8–10 mm. wide, smooth, slightly shiny, tawny or stramineous, mottled and streaked with chestnut or dark brown.
    Figures
    Fig. 30.
    Habitat
    Understorey tree of lake-level swamp-forest; 1130–1150 m
    Distribution
    U4

    Images

    Distribution

    Native to:

    Tanzania, Uganda, Zambia, Zaïre

    Pseudagrostistachys ugandensis (Hutch.) Pax & K.Hoffm. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jun 1, 1961 Fyffe, R. [64], Uganda K000422709
    Jun 1, 1961 Fyffe, R. [19], Uganda K000422708
    Drummond, R.B. [4564], Uganda 2128.000
    Fyffe, R. [64], Uganda K000422710
    Fyffe, R. [19], Uganda K000422707

    First published in H.G.A.Engler (ed.), Pflanzenr., IV, 147, XVII: 180 (1924)

    Accepted by

    • Lejoy, J., Ndjele, M.-B. & Geerinck, D. (2010). Catalogue-flore des plantes vasculaires des districts de Kisangani et de la Tshopo (RD Congo) Taxonomania. Revue de Taxonomie et de Nomenclature Botaniques 30: 1-307.
    • Radcliffe-Smith, A. & Hoffmann, P. (2006 publ. 2007). New records, names and combinations in African Euphorbiaceae sensu lato Kew Bulletin 61: 609-611.
    • Govaerts, R., Frodin, D.G. & Radcliffe-Smith, A. (2000). World Checklist and Bibliography of Euphorbiaceae (and Pandaceae) 1-4: 1-1622. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Radcliffe-Smith, A. & Hoffmann, P. (2006 publ. 2007). New records, names and combinations in African Euphorbiaceae sensu lato Kew Bulletin 61: 609-611.
    Flora of Tropical East Africa
    • J. Léon. in Flore du Congo Belge et du Ruanda-Urundi, 8(1): 185 (1962).
    • W.J. Eggeling, Indigenous Trees of the Uganda Protectorate ed. 2: 138 (1952).
    • Pax & K. Hoffm. in A. Engler, Das Pflanzenreich IV. 147 (17 - Addit. 7): 180 (1924).

    Sources

    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
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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