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This species is accepted, and its native range is Angola.
A specimen from Kew's Herbarium

[KBu]

Hind, D.J.N. & Goyder, D.J. 2014. Stomatanthes tundavalaensis (Compositae: Eupatorieae: Eupatoriinae), a new species from Huíla Province, Angola, and a synopsis of the African species of Stomatanthes. Kew Bulletin 69: 9545. DOI https://doi.org/10.1007/s12

Conservation
Although field observations indicate that the species is locally common at the type locality, and there is no serious threat to the habitat, it is probably better to record the species as DD (Data Deficient) until further fieldwork can be undertaken.
Distribution
Only known from the type collection from the Lubango Escarpment, Serra da Chela, Huíla Province, Angola.
Ecology
Found on rocky slopes (Bruco Formation — sandstones and siltstones interbedded with volcanic and conglomeratic levels) on a spur of the escarpment at the edge of burned Protea grassland. Fig. 1.
Morphology General Habit
Suffrutex to c. 35 cm tall; rootstock xylopodium to c. 4 cm diam., stems apparently arising from periphery of xylopodium, stem bases with several scale-like leaves, sessile, triangular, 5 – 6 × 2.5 mm, margins entire, apex acute, glabrous adaxially
Morphology Leaves
Leaves in alternate- to subopposite- pairs, sessile or subsessile, lamina cordate (except for lanceolate uppermost leaves or those on vegetative leafy branches), (3.5 –) 4 – 11 [12] mm long (from insertion of petiole)[including basal lobes] × (2 –) 3.5 – 10 mm, pale green and concolorous, 3-veined from base, venation yellowish-green, often conspicuously separate on underside of short petiole, primary and secondary venation prominent beneath (tertiary venation prominent only around areoles under a dissecting microscope at c. ×50), both surfaces glistening with clear or pale amber-coloured glandular exudate (with one gland per areole), pubescence of adpressed, uniseriate, multicellular, eglandular whitish hairs largely restricted to the primary, secondary and tertiary venation, margins coarsely dentate to serrate, teeth c. 1.5 mm (from sinus to sinus) × c. 0.5 mm long, lamina apex acute
Morphology Reproductive morphology Flowers Florets
Florets 5 (very rarely 6) per capitulum, hermaphrodite, corollas white (throat) to greenish-white (basal tube), corolla tube cylindrical in upper part, widened slightly at base, c. 2 mm long × 0.3 mm diam., sparsely glandular-punctate throughout, exudate clear, throat c. 1.5 mm long × 0.8 mm diam., very sparsely and irregularly pubescent, hairs uniseriate, multicellular and eglandular, corolla lobes 5, narrowly triangular, 0.5 – 0.7 mm long, apices abaxially glandular and rarely with few to several hairs; filament attachment point in upper part of corolla tube below expansion into throat, anther collar conspicuous and flattened with thickened margins, pollen sacs brownish, apical anther appendages exserted from corolla throat, triangular, apices acute, basal anther appendages rounded; style base lacking basal node, pubescent, style shaft glabrous, style arms linear, c. 3 mm long, eventually spreading
Morphology Reproductive morphology Fruits
Achenes 2.3 – 3 mm long, prismatic, 5-ribbed, ribs usually pale, setuliferous throughout but usually more densely so above carpopodium, setulae of twin hairs, apices subequal and scarcely- or conspicuously- divided or apices conspicuously unequal and divided low down on setulae, achene body blackish, sparsely setuliferous and moderately to densely glandular punctate, usually densely so and forming a collar beneath pappus, glandular exudate clear and glistening; carpopodium a conspicuous but narrow annulus, straw-coloured although sometimes greenish in some ±mature achenes; pappus setae uniseriate, subequal, 3.4 – 5 mm long, coarsely barbellate, white, apical cells acute Figs 2 & 3.
Morphology Reproductive morphology Inflorescences
Inflorescences terminal, moderately densely paniculate, c. 3.5 cm across, main inflorescence or subterminal stem branches subtended by lanceolate leaf-like bracts (smallest sizes of leaves mentioned above), bases cordate to usually cuneate, margins entire, apices acute
Morphology Reproductive morphology Inflorescences Capitulum
Capitula homogamous and discoid; involucre broad-cylindrical becoming flared in age; phyllaries distant to subimbricate, loosely 3-seriate, outermost c. 2 × 0.6 mm, inner 3.5 – 5 × 1 – 2.5 mm, margins narrowly to moderately broad-scarious, sparsely laciniate in lower half and conspicuously lacerate to laciniate towards apex, mid-portion light green, sparsely to moderately densely pubescent especially towards apex, apices acute (outer phyllaries) or obtuse to rounded (mid- to inner- phyllaries), phyllaries eventually spreading and straw-coloured; receptacle small, scarcely convex, glabrous, epaleaceous
Morphology Stem
Stems relatively few, simple (sometimes with few subterminal, ascending to erect, inflorescence branches), 22 – 34 cm tall, cylindrical, striate, and ribs somewhat paler yellowish-green, moderately to densely pubescent, hairs predominantly adpressed, occasionally ascending, uniseriate, multicellular and eglandular, sparsely glandular-punctate, gland exudate usually clear and glistening, main internodes 15 – 20 mm, usually conspicuously longer than laminas of leaves of leaf-pairs
Note
Stomatanthes tundavalaensis is similar to S. meyeri in its suffrutescent habit, few unbranched stems, and its subopposite cordate leaves with prominent venation (at least the primary and secondary) on both surfaces, but differs conspicuously in height (0.22 – 0.34 m vs 1.22 – 2 m), leaf size ((3.5 –) 4 – 11 [12] mm long × (2 –) 3.5 – 10 mm vs 4 – 7 × 3.5 – 5.5 cm), the leaves being sessile to subsessile throughout (petioles to c. 0.5 mm vs (2 –) 4 – 12 mm in basal leaves, the upper sessile to subsessile), subtending internodes (15 – 20 mm) between each leaf pair longer than the leaf lamina (vs subtending internodes 30 – 45 mm between each leaf pair shorter than leaf lamina), pubescence mostly of adpressed and erect hairs not forming a superficial layer (vs most hairs erect and often forming a distinct superficial layer), the inflorescences terminal or of few subterminal branches lacking any conspicuous leaf-like bracts and relatively small (c. 3.5 cm across) (vs densely paniculate with upper part of flowering stem bearing several inflorescence branches subtended by very conspicuous leaf-like bracts, the whole flowering part of the stem large and 15 – c. 40 cm long and up to 15 cm across or larger), phyllary apices sparsely to moderately pubescent (vs densely pubescent), and acute, to somewhat obtuse, apical anther appendages (vs truncate). The species is named after the Tundavala Gorge on the edge of the Lubango Escarpment overlooking Bibala to the north-west.
Phenology
Flowering September to October (possibly into November).
Type
Type: Angola, Huíla Province: Lubango area. Escarpment edge c. 1.4 km NE of Tundavala Gorge, 14°48'37""S, 13°23'32""E, 2216 m alt., 15 Oct. 2013, Goyder & Clark 7609 (holotype K; isotypes GRA, LUBA, Z).

Native to:

Angola

Stomatanthes tundavalaensis D.J.N.Hind appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Goyder [7609], Angola K000743193 holotype

First published in Kew Bull. 69(4)-9545: 5 (2014)

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 Bulletin

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The International Plant Names Index and World Checklist of Selected Plant Families 2021. 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

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Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. 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