Stenostephanus suburceolatus J.R.I.Wood

This species is accepted, and its native range is W. Bolivia.


Wood, J.R.I. 2015. New species of Acanthaceae from Bolivia. Kew Bulletin 70: 34. DOI

Only known from a single recent collection so correctly Data Deficient according to IUCN (2012) guidelines. However, it is the first time it has been collected during the intensive studies of the flora of the Madidi National Park by Alfredo Fuentes and his team and, unless it is pliestesial, it is therefore very rare and will probably prove to be at least Endangered (EN) within IUCN guidelines when the population is properly assessed. Fortunately it grows within a legally protected area with a high profile nationally and internationally so habitat destruction is unlikely.
This species is only known from the type collection from the Madidi National Park in Bolivia close to the frontier with Peru.
A rare species of moist Andean hill forest at almost 1400 m.
Morphology General Habit
Perennial herb reaching at least 30 cm in height (1 m according to field notes); stem dark green, thinly crisped-hairy
Morphology Leaves
Leaves isophyllous, petiolate; petiole 1.5 – 5 cm long, shortly villous with crisped, brownish multicellular hairs; lamina 7 – 12.5 × 3.5 – 6.5 cm, ovate to ovate-elliptic, base broadly cuneate, slightly asymmetric, margin entire to slightly undulate, shortly ciliate, apex acuminate; lateral veins c. 9 pairs; adaxial surface dark green with linear cystoliths, hirsute with scattered stiff whitish hairs, these more dense on the veins; abaxial surface paler with weakly reticulate venation, the mid vein shortly villous with crisped brownish multicellular hairs, the side veins markedly less hirsute, the intercostal regions glabrous or nearly so
Morphology Reproductive morphology Fruits
Capsule and seeds not seen
Morphology Reproductive morphology Inflorescences
Inflorescence of pedunculate axillary racemes arising in the upper leaf axils; peduncles 5.5 – 8 cm, densely villous with crisped, brownish multicellular hairs; bracts 4 – 5.5 × 1.5 – 2.5 cm, paired, foliose, sessile, ovate-elliptic, acuminate, indumentum similar to that of the leaves; rhachis 3 – 4 cm, densely villous with whitish hairs, naked below, floriferous above; flowers in opposite pairs, subsessile with pedicels 0 – 1 mm long; bracteoles c. 2 × 0.25 mm, very narrowly linear-deltoid terminating in a long fine point; calyx subequally 5-lobed to base, the lobes 7 – 8 × 0.5 – 0.75 mm, linear, acuminate, pallid; corolla 21 – 22 mm long, suburceolate, the basal cylindrical part 7 × 1.5 – 2 mm, then abruptly widened to 7 mm before being narrowed slightly at the mouth, 4-lobed, the lobes subequal, 1.5 mm long and wide, ovate-triangular, exterior of corolla magenta, glandular-pubescent, interior of lobes deep pink; stamens 2, exserted 5 – 6 mm; filaments 15 – 17 mm, inserted at top of basal cylindrical part, thinly pilose below, glabrous above; anthers 2.5 × 0.5 mm, linear-oblong, 1-celled; style 22 – 24 mm, exserted, glabrous except for a few hairs at base; ovary c. 2 mm long, linear-lanceolate in outline, glabrous, basal disc prominent
Stenostephanus suburceolatus has a subequally 4-lobed corolla and so clearly belongs to the group of Stenostephanus species once placed in Hansteinia Oerst. Amongst Bolivian species it is closest to S. lyman-smithiiWassh. but that species has a distinctly long-spicate terminal inflorescence very different from the short axillary racemes of S. suburceolatus. Additionally the corolla of S. lyman-smithii is only 15 – 18 mm long and glabrous except for a few hairs near the apex. The strongly exserted stamens of S. suburceolatus recall those of S. longistaminus (Ruiz & Pavon) V. M. Baum but that species has a glabrous corolla and a terminal inflorescence. The most similar species to S. suburceolatus is represented by a specimen of an undescribed species at Kew from Cusco in Peru. This has the same short axillary racemes but they are subsessile, the corolla is shorter and the calyx lobes broader. It is hoped to describe this later in a paper on Stenostephanus in Peru.
Type: Bolivia, La Paz, Prov. Abel Iturralde, Parque Nacional Madidi, Asariamas, entre San Martín y Rancho Chico, 1382 m, 29 June 2013, A. Fuentes 18450 (holotype LPB; isotypes K, MO).

Native to:


Stenostephanus suburceolatus J.R.I.Wood appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Fuentes, A. [1845], Bolivia K000543790 isotype

First published in Kew Bull. 70(3)-34: 1 (2015)

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. Scientific Data 8: 215.


Kew Bulletin

  • Calzadilla, E. & Churchill, S. P. (2014). GlosarioIlustrado para MusgosNeotropicales. Missouri Botanical Garden Press, St Louis & Museo de Historia Natural, Santa Cruz.
  • Daniel, T. (2006). Synchronous Flowering and Monocarpy suggest plietesial life history for neotropical Stenostephanuschiapensis (Acanthaceae). Proc. Calif. Acad. Sci. 57: 1011 – 1018.
  • IUCN (2012). Guidelines for application of IUCN Red List Criteria at Regional and National Levels. International Union for the Conservation of Nature, Gland.
  • Wasshausen, D. C. & Wood, J. R. I. (2004). Acanthaceae of Bolivia. Contr. U.S. Natl. Herb. 49: 1 – 152.
  • Wasshausen, D. C. & Wood, J. R. I. (2015). Acanthaceae. In: P. M. Jorgensen, S. G. Beck & M. Nee (eds), Catálogo de las PlantasVasculares de Bolivia, 179 – 192. Missouri Botanical Garden Press, St. Louis.
  • Wood, J. R. I. (1988). Colombian Acanthaceae — some new discoveries and some reconsiderations. Kew Bull. 43: 1 – 51.CrossRefGoogle Scholar
  • Wood, J. R. I. (2009). New names, combinations and synonyms in Justicia and Stenostephanus (Acanthaceae). Kew Bull. 64: 49 – 55.
  • Wood, J. R. I. (2012). Two new species of Acanthaceae from Bolivia. Kew Bull. 67: 257 – 262.

  • Herbarium Catalogue Specimens

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    © Copyright 2017 World Checklist of Selected Plant Families.

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  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at and
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.