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

[FTEA]

Acanthaceae (part 2), Kaj Vollesen. Flora of Tropical East Africa. 2008

Type
Type: Tanzania, Mbeya District: Poroto Mts, Chimala, Bidgood, Congdon & Vollesen 2104 (K!, holo.!; BR!, C!, CAS!, EA!, K!, MO!, NHT!, P!, WAG!, iso.)
Morphology General Habit
Perennial or shrubby perennial herb with erect branched stems from a creeping rootstock; stems to 50 cm tall, when young retrorsely sericeous or puberulous with hairs 0.5–1 mm long, sometimes only on two sides, eventually with bark peeling in papery strips
Morphology Leaves
Leaves ovate to elliptic, largest 3.8–8 × 1.5–3.5 cm, more than twice as long as wide, apex acute to rounded, base attenuate to truncate, decurrent to an indistinctly delimited ciliate petiole to 5 mm long, uniformly puberulous or sparsely so above, below densest along veins with lamina sometimes glabrous; margin crenate to dentate, tertiary veins not or slightly raised, stipule sheath 0.5–1 mm long
Morphology Reproductive morphology Flowers
Flowers in 1- to many-flowered well separated condensed axillary cymes or these sometimes congested towards tip of branches; peduncles and pedicels 1–2 mm long, sericeous or densely so; outer bracts foliaceous, to 1.5 cm long; inner bracts and bracteoles linear to oblong, to 1.5 cm long, with scattered to dense broad glossy hairs (densest along margins) and often with a sparsely puberulous “undercoat”
Morphology Reproductive morphology Flowers Calyx
Calyx (12–)14–16(–21 in fruit) mm long, tube 5–7 mm long, puberulous or densely so, teeth gradually with sparser indumentum upwards, tube and basal part of teeth also with scattered to dense broad glossy hairs to 1 mm long; teeth narrowly triangular, acuminate to cuspidate, dorsal 6–9 mm long (longer than tube), ventral 5–7 mm long of which the free part 2–3 mm
Morphology Reproductive morphology Flowers Corolla
Corolla white with pale pink patches in throat, (15–)18–23 mm long, puberulent; tube 10–14 mm long of which the throat 4–5 mm; lips 5–9 mm long; lobes oblong, 2–3.5 mm wide, rounded to retuse; palate without long stiff hairs
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 3–5 mm long, with scattered hairs throughout; anthers 1.5–2 mm long, thecae rounded, connective densely glandular or with mixtute of glands and hairs
Morphology Reproductive morphology Flowers Gynoecium Stigma
Dorsal stigma lobe half the length of ventral
Morphology Reproductive morphology Fruits
Immature capsule ± 12 mm long, obovoid
Morphology Reproductive morphology Seeds
Seed not seen
Ecology
Open Brachystegia woodland on steep rocky slopes with brown gritty loamy soil; 1300–1550(?–2000) m
Distribution
Range: Not known elsewhere Flora districts: T7

Native to:

Tanzania

Duosperma porotoense Vollesen appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Apr 27, 2005 Bidgood, S. [2104], Tanzania K000393959 isotype
Apr 27, 2005 Bidgood, S. [2104], Tanzania K000393960 holotype

First published in Kew Bull. 61: 333 (2006)

Accepted by

  • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.

Literature

Flora of Tropical East Africa

  • K.B. 62: 333, fig. 13 L–N (2006).

Flora of Tropical East Africa
Flora of Tropical East Africa
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 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

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