Peliostomum junceum (Hiern) Kolberg & van Slageren

This species is accepted, and its native range is SW. Botswana to N. Cape Prov.

[KBu]

Kolberg H., van Salgeren M. 2016. A synopsis of Aptosimum and Peliostomum (Scrophulariaceae) in Namibia, including the description of a new species, Aptosimum radiatum, and keys to all accepted species. Kew Bulletin 71:16. DOI 10.1007/S12225-016-9628-7

Conservation
Based on the few specimens available, the evaluation here is LC for Namibia. Under criterion B both the EOO and AOO are within that for the CR category, but none of the other criteria is met to qualify for a threatened status (IUCN 2012, 2013). Under criterion D, the species would also qualify for VU but these evaluations must be seen against the background of using only two Namibian specimens. The species is probably more widespread but difficult to find and occurs in parts of Namibia that are undercollected. The status in South Africa is LC (SANBI 2014).
Distribution
Africa: Botswana, Namibia, South Africa.
Ecology
Occurring in sandy soil of the Kalahari savanna vegetation type (Mendelsohn et al. 2010). Found in the undefined area between the Kalahari Sands in the south and Zambesian Domain in the north of Craven (2009). Altitude: c. 1500 m.
Morphology General Habit
Shrub, erect, rigid, much-branched, virgate, 8 – 55 cm tall, not spinescent
Morphology Leaves
Leaves sparse, mostly absent or reduced to c. 2 mm long scales, linear to narrowly obovate-oblong, 8 (– 15) × 0.3 – 0.5 mm, glabrous or nearly so; apex obtuse; base subsessile
Morphology Reproductive morphology Flowers
Flowers solitary, axillary, pedicellate; pedicels 1 – 6 mm long, glabrous; bracteoles filiform, to 1 mm long
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens four; filaments subequal in length; anthers equal, long-ciliate
Morphology Reproductive morphology Flowers Calyx
Calyx lobed to base; lobes linear to linear-lanceolate, 2 – 5 mm long, minutely puberulous or glabrous outside, minutely glandular-pubescent inside
Morphology Reproductive morphology Flowers Corolla
Corolla 12 – 18 mm long, minutely stipitate-glandular to glabrous outside; contracted part of tube exceeding calyx, gradually widening, pale purplish-blue to white with purple venation outside; lobes circular to ovate, to 5.5 mm diam., inside purplish-blue, darker patch at base
Morphology Reproductive morphology Fruits
Capsule ovoid-conical, slightly compressed, 5 – 8 × 2 – 3 mm; apex subobtuse or scarcely acute
Morphology Reproductive morphology Seeds
Seed not observed.
Morphology Stem
Stems slender, glabrous to minutely puberulous, somewhat herbaceous, ribbed, angular towards apex; smooth, woody-corky, white towards base
Note
This species has been recorded in the literature only for Botswana and South Africa (Smithies & Ready 2003) but was found recently in Namibia as well. Philcox (1985) considered this taxon sufficiently different from Peliostomum leucorrhizum to elevate var. junceum of Hiern (1904) to specific level but at the same time transferred it to Aptosimum. Following our decision to uphold Peliostomum and Aptosimum as separate genera, the capsule morphology places this species in the genus Peliostomum, necessitating a change of name here.
Phenology
Flowering and fruiting throughout the year. Peak flowering and fruiting: March – April.
Type
Type: [Botswana] Bechuanaland, Chooi desert [between Last-Water Station and Desert Station, Kalahari], Burchell 2338 (holotype K-410923!).

[FZ]

Scrophulariaceae, D. Philcox. Flora Zambesiaca 8:2. 1990

Morphology General Habit
Erect, virgate undershrub up to 55 cm. tall, much-branched from base.
Morphology Stem
Stem and branches glabrous, ribbed, often white-corky at base.
Morphology Leaves
Leaves up to 8(12) x 0.3–0.5 mm., narrowly obovate-oblong, glabrous where present, more usually absent or reduced to short leaf-like processes up to c. 2 mm. long.
Morphology Reproductive morphology Flowers
Flowers solitary, pedicellate.
Morphology Reproductive morphology Flowers Pedicel
Pedicels 4.5–6 mm. long, glabrous.
Morphology Reproductive morphology Flowers Calyx
Calyx lobes 2–3 mm. long, joined only at base for c. 0.5 mm., linear to narrowly linear-ovate, glabrous without but occasionally short-ciliate, minutely glandular-pubescent within.
Morphology Reproductive morphology Flowers Corolla
Corolla purplish-blue, tube (10)15–18 mm. long, funnel-shaped, narrow base much longer than calyx, wider above, sparsely, minutely stipulate-glandular to glabrous without; lobes broadly ovate-circular, to 5.5 mm. diam.
Morphology Reproductive morphology Fruits
Capsule 5.5–7 x 2.75–3 mm., obvoid-oblong to ovoid-conical, acute to subobtuse.

Native to:

Botswana, Cape Provinces

Peliostomum junceum (Hiern) Kolberg & van Slageren appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Burchell [2338], Botswana Aptosimum junceum K000410923 holotype Yes

First published in Kew Bull. 71(2)-16: 42 (2016)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

Literature

Kew Backbone Distributions

  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa an annotated checklist Strelitzia 14: 1-1231. National Botanical Institute, Pretoria.

  • Flora Zambesiaca

    Flora Zambesiaca
    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/

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. 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 Bulletin

    Kew Bulletin
    http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. 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