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  1. Family: Solanaceae Juss.
    1. Genus: Solanum L.
      1. Solanum setaceum Dammer

        This species is accepted, and its native range is Kenya to Tanzania.


    Solanaceae, Jennifer M Edmonds. Oliganthes, Melongena & Monodolichopus, Maria S. Vorontsova & Sandra Knapp. Flora of Tropical East Africa. 2012

    Type: Tanzania, Kilimanjaro, Dehu, Kahe, Volkens 2202 (B†, holo.; GOET!, lecto., designated by Vorontsova & Knapp in Taxon 59: 1599, 2010; GOET!, isolecto.)
    Scandent or climbing subshrub to 1 m, armed; young stems stellate-pubescent, trichomes porrect, translucent, stalked, stalks 0.1–0.2 mm, elongating to form the bristles, rays 6–8, 0.2–0.3 mm, midpoints shorter or longer than rays; bristles curved, (2.5–)3–5 mm long, 0.1–0.5 mm wide at base
    Leaf blades drying concolorous to weakly discolorous, yellow-green, ovate, 1.5–5(–7) × 0.7–2(–4) cm, 2–4 times longer than wide, base cordate to obtuse, usually equal, margin subentire or lobed, the lobes 1–3 on each side, 0–5 mm long, broadly rounded, extending up to 1/3 of the distance to the midvein; apex obtuse; stellate-pubescent on both sides, trichomes on abaxial surface porrect (multangulate), stalked, stalks 0.1–0.2 mm, rays 6–8(–11), 0.1–0.3(–0.4) mm, midpoints ± same length as rays, adaxially with fewer shorter rays; primary veins 3–5 pairs; petiole 0.5–1 cm, (1/2–)1/3–1/4 of the leaf length
    Inflorescences not branched, 2–3 cm long, with 1–3(–4) flowers; peduncle 0(–8) mm long; rachis 0–1 cm long; peduncle and rachis unarmed; pedicels 0.6–1.2 cm long in flower, in fruit 0.9–1.6 cm long, unarmed or with 1–10 bristles
    Flowers perfect, 5merous. Calyx 3.5–7 mm long, lobes long-deltate or oblong, 3–5 mm long, acute to acuminate, unarmed or with a few bristles
    Corolla white to mauve, 1.4–2 cm in diameter, lobed for ± 4/5 of its length, lobes lanceolate to oblong, 6.5–8 × 2–3 mm
    Stamens equal; anthers 5–8 mm
    Ovary stellate-pubescent in the upper 1/3–1/4; style 8.5–14 mm long
    Berries 1–4 per infructescence, 6–9 mm in diameter, spherical, evenly green when young, red at maturity
    Seeds 2.8–3 × 2.1–2.3 mm
    Fig 21, p 181
    Acacia bushland, thickets and grassland on sandy loam or black cotton soil; 1000–1500 m
    Solanum setaceum is instantly recognisable by the long bristles on its younger stems. It is a frequent and fairly uniform species with shallowly lobed ovate yellowish leaves and trichome stalks 0.1–0.2 mm long on its vegetative parts. Stalks of some trichomes on the young stems lengthen and lignify to form the bristles, and stellate trichome rays are often visible on the apices of developing bristles. The bristles vary from long, dense, pale yellowish, filiform structures perpendicular to the stem to thicker, recurved, dark brown to grey structures that are further apart and similar to the prickles found in related species. Solanum setaceum lies within the distribution area of the variable S. hastifolium and has limited range overlap with S. taitense. There are no consistent morphological differences with S. hastifolium outside the bristles. The uniform nature of S. setaceum and its geographical coherence justify maintaining it as a distinct species.
    Range: Not known elsewhere Flora districts: K6 T1 T2 T5



    Native to:

    Kenya, Tanzania

    Other Data

    Solanum setaceum Dammer appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Greenway, P.J. [9908], Tanzania K001158028
    Greenway, P.J. [9686], Kenya K001158030
    Greenway, P.J. [11031], Tanzania K001158043
    Bally, P.R.O. [2388], Tanzania K001158015
    Bally, P.R.O. [4123], Tanzania K001158040
    Tanner, R. [4431], Tanzania K001158014
    Tanner, R. [3298], Tanzania K001158024
    Tanner, R. [1706], Tanzania K001158027
    Richards, M. [25650], Tanzania K001158017
    Richards, M. [20258], Tanzania K001158020
    Richards, M. [25666], Tanzania K001158022
    Richards, M. [23587], Tanzania K001158023
    Richards, M. [24743], Tanzania K001158025
    Richards, M. [25706], Tanzania K001158032
    Richards, M. [25506], Tanzania K001158033
    Richards, M. [24350], Tanzania K001158036
    Richards, M. [26590], Tanzania K001158037
    Richards, M. [23465], Tanzania K001158038
    Verdcourt [3851], Kenya K001158031
    Verdcourt, B. [3851], Kenya K001158029
    Abdallah, R. [95/37], Tanzania K001158019
    Abdallah, R. [95/159], Tanzania K001158026
    Haarer, A.E. [13], Tanzania K001158039
    Newbould, J.B. [5917], Tanzania K001158016
    Newbould, J.B. [6402], Tanzania K001158035
    Paulo, S. [381], Tanzania K001158034
    Chuwa, S. [2856], Tanzania K001158041
    Beesley, J.S.S. [101], Tanzania K001158021
    Richards, M.A.E. [20362], Tanzania K001158018
    Svens, G.W. [876], Tanzania K001158042


    First published in Pflanzenw. Ost-Afrikas, C: 253 (1895)

    Accepted by

    • PBI Solanum Project (2014-continuously updated). Solanaceae Source: a global taxonomic resource for the nightshade family


    Flora of Tropical East Africa

    • U.K.W.F., 2nd ed.: 243 (1994).
    • T.T.C.L.: 580 (1949)
    • P.O.A. C: 353 (1895)


    Flora of Tropical East Africa
    Flora of Tropical East Africa

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