Skip to main content
This species is accepted, and its native range is Ethiopia to NE. Tanzania.
A specimen from Kew's Herbarium

[FTEA]

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

Type
Type: Kenya, Machakos/Kitui District: Ukamba, Hildebrandt 2720 (B†, holo.; COR, iso.; K!, fragment & photo).
Morphology General Habit
Erect annual herb to 35 cm tall, unbranched with an apical rosette of leaves and 1–4 sessile spikes or with up to 4 branches up to 10 cm long from the rosette and these each ending in a rosette with a single sessile spike; young stems glandularpuberulous to pilose. Leaves subsessile; lamina obovate or narrowly so, largest 5–15 × 1–5 cm, apex subacute to broadly rounded, pubescent or sparsely so, usually only on veins when mature
Morphology Reproductive morphology Inflorescences
Spikes 2–12 cm long; fertile bracts broadly obovate to orbicular or transversely elliptic, 12–16 × 10–17 mm, ending in a straight spine 2–6 mm long and on each side with 4–6 prickles 3–6 mm long (sometimes also with a few short ones between these), basal part pilose, apical part puberulous, venation reticulate, very prominently raised; bracteoles 11–14 mm long, pilose
Morphology Reproductive morphology Flowers Calyx
Sepals lanceolate with long cuspidate-spinulose tip, pilose near tip, dorsal 12–15 mm long, ventral 10–13 mm long, lateral 9–11 mm long
Morphology Reproductive morphology Flowers Corolla
Corolla bright yellow; tube up to 15 mm long; limb 8–13 mm long
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers with a small apical horn
Morphology Reproductive morphology Fruits
Capsule 8–10 mm long
Morphology Reproductive morphology Seeds
Seed 3–4 × 2.5–3 mm.
Ecology
Grassland and Acacia bushland on black cotton soil, wet depressions in Acacia-Commiphora bushland, riverine forest and riverbanks; (150–)300–1200 m
Note
The pollen grains of this species are the longest ever reported in terrestrial angiosperms. They are rod-shaped and ± 0.5 mm long (visible with the naked eye). See Brummitt, Ferguson & Poole in Pollen et Spores 22: 12 (1980). They are probably a rudiment of the second locule. The peculiar small apical horns on the anthers have not been seen in any other species.
Distribution
Flora districts: U1 K1 K3 K4 K6 K7 T3 Range: Ethiopia, Somalia

[FSOM]

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Annual herb, 5–30 cm tall; young branches glandular hairy
Morphology Leaves
Leaves seemingly in whorls of 4, pubescent, subsessile; blade oblong-elliptic, 2–12 x 1–5 cm, subacute to obtuse at the apex
Morphology Reproductive morphology Inflorescences
Spikes sessile, 3–10 cm long; bracts with spiny tip and spiny margins, broadly obovate, c. 12 x 10 mm excluding spines, ± sparsely pilose, with 5–7 strong longitudinal veins and raised reticulum
Morphology Reproductive morphology Flowers Corolla
Corolla yellow; tube c. 15 mm long; limb c. 12 mm long.
Distribution
S1, 3; Ethiopia, Uganda, Kenya, Tanzania
Ecology
Altitude range 50–200 m.

Native to:

Ethiopia, Kenya, Somalia, Tanzania, Uganda

Crossandra stenostachya (Lindau) C.B.Clarke appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Sep 1, 2007 Festo, L. [2283], Kenya K000469021
Hildebrandt, J.M. [2720], Kenya K000394642 Unknown type material

First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 5: 113 (1899)

Accepted by

  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.
  • Hedberg, I., Kelbessa, E., Edwards, S., Demissew, S. & Persson, E. (eds.) (2006). Flora of Ethiopia and Eritrea 5: 1-690. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • Thulin, M. (ed.) (2006). Flora of Somalia 3: 1-626. The Royal Botanic Gardens, Kew.
  • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.

Literature

Flora of Somalia

  • Flora Somalia, (2000) Author: by M. Thulin [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • Blundell, Wild Fl. Kenya: 105 (1982)
  • E.P.A.: 955 (1964)
  • F.E.E. 5: 369 (2006)
  • F.T.A. 5: 113 (1899)
  • Fl. Somalia 3: 386 (2006).
  • K.B. 45: 529 (1990)
  • Lebrun & Stork, Enum. Pl. Afr. Trop. 4: 476 (1997)
  • U.K.W.F. ed. 2: 274 (1994)
  • U.K.W.F.: 581 (1974)
  • Wild Fl. E. Afr.: 390 (1987)

Flora of Somalia
Flora of Somalia
http://creativecommons.org/licenses/by-nc-sa/3.0

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