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This species is accepted, and its native range is Peru to NW. Brazil and W. Bolivia.
A specimen from Kew's Herbarium

[KBu]

Wood, J.R.I. Stenostephanus (Acanthaceae) in Peru. Kew Bulletin 74: 64 doi:10.1007/s12225-019-9843-0

Morphology General Habit
Herb to subshrub 0.4 – 1.5 m; stems quadrangular, pubescent or glabrous
Morphology Leaves
Leaves petiolate; petioles 0.3 – 2.5 cm, pubescent; lamina 8 – 30 × 2.5 – 15 cm, elliptic, shortly acuminate, base attenuate and shortly decurrent onto the petiole, veins 10 – 12 pairs, margins undulate to irregularly crenate, adaxially glabrous to subglabrous but with scattered hair bases and short hairs, abaxially paler, glabrous or pubescent, especially on the veins
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens exserted 5 – 20 mm, anthers 3 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx 4 – 5 mm long, the basal part c. 1 mm long, the lobes 3 – 3.5 mm, lanceolate-deltoid, acute, glabrous or puberulous
Morphology Reproductive morphology Flowers Corolla
Corolla 1.6 –3 cm long, pink, “fuchsia” or pinkish-purple, glabrous or pubescent especially towards the apex, basal tube 2 – 2.5 cm long, weakly 2-lipped, the upper lip 3 – 5 mm long, entire, erect, the lower lip shorter, unequally 3-lobed, the lateral lobes longer than the central lobe, 1 – 2 mm long
Morphology Reproductive morphology Flowers Gynoecium Style
Style glabrous, stigma subglobose
Morphology Reproductive morphology Flowers Pedicels and Peduncles
Peduncles, secondary peduncles and pedicels very short, 2 – 3 mm, pubescent
Morphology Reproductive morphology Fruits
Capsule 15 × 2.25 cm, weakly clavate, glabrous, 4-seeded
Morphology Reproductive morphology Inflorescences
Inflorescence a pedunculate, hirsute, terminal thyrse 4 – 12 (– 20) × 2 – 5 cm, sometimes spike-like; rhachis densely yellow-green hirsute with short, spreading hairs, bracts at base of inflorescence resembling small, pubescent, sessile leaves; dichasia dense, many-flowered, c. 1.5 cm long, up to 20 arranged along the rhachis, c. 2 cm distant below but imbricate above, bracteoles lanceolate-deltoid, c. 2 × 1.5 mm long
Morphology Reproductive morphology Seeds
Seeds 1.5 × 1 mm, lenticular, reticulate.
Note
The epithet longistaminea (with “e”) was inexplicitly changed to longistaminus (without “e”) by Baum (1982) when making the combination in Stenostephanus. Most recent publications have followed this spelling but the original, as used by Ruiz & Pavon, should be used. This species is sometimes filed, as in Madrid, under the name Odontonema longistamineum (Ruiz & Pav.) Kuntze, but this appears to be a nomen nudum as it was never published. The photograph of the Berlin specimen of Stenostephanus thyrsoides at the Field Museum (FOBN008836) does not appear to be an image of the type as it is labelled as Weberbauer 6798. It is possible that the holotype was never at Berlin although there is nothing to indicate this in the protologue. Stenostephanus longistamineus is an exceptionally widespread species, occurring in three countries and is also exceptionally variable. Variation is most marked in the form of the inflorescence (subspicate to a lax thyrse), in the size of the inflorescence (short and much exceeded by the subtending leaves, to elongate and much exceeding the subtending leaves), inflorescence indumentum (glabrous to densely hirsute) and to a lesser extent corolla size and indumentum.

Native to:

Bolivia, Brazil North, Peru

Stenostephanus longistaminus (Ruiz & Pav.) V.M.Baum appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Sep 19, 2006 Ule, E. [9795], Peru K000529044
Jan 1, 1995 Cardenas, M. [1905], Bolivia K000529043 isotype

First published in Brittonia 34: 433 (1982)

Accepted by

  • Jørgensen, P.M., Nee, M.H. & Beck., S.G. (eds.) (2013). Catálogo de las plantas vasculares de Bolivia Monographs in Systematic Botany from the Missouri Botanical Garden 127: 1-1741. Missouri Botanical Garden.

Literature

Kew Backbone Distributions

  • Forzza, R.C., Zappi, D. & Souza, V.C. (2016-continuously updated). Flora do Brasil 2020 em construção http://reflora.jbrj.gov.br/reflora/listaBrasil/ConsultaPublicaUC/ResultadoDaConsultaNovaConsulta.do.
  • Jørgensen, P.M., Nee, M.H. & Beck., S.G. (eds.) (2013). Catálogo de las plantas vasculares de Bolivia Monographs in Systematic Botany from the Missouri Botanical Garden 127: 1-1741. Missouri Botanical Garden.

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 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 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