Genus:
Leucas R.Br.

Leucas urticifolia (Vahl) Sm.

This species is accepted, and its native range is Mauritania to India.

[FSOM]

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

Morphology General Habit
Annual herb, 0.1–0.5 m tall; stems moderately to densely pubescent with recurved hairs
Morphology Leaves
Leaves petiolate or upper leaves sessile; blade ovate to lanceolate, up to 12–35 × 8–22 mm, 1.5–5 times as long as wide, more densely hairy below, apex rounded to subacute, margin crenate
Morphology Reproductive morphology Inflorescences
Verticillasters spaced at least at the based of inflorescence, globose; cymes 15–40-flowered; bracteoles 9–14 mm long; pedicels 0–1 mm long
Morphology Reproductive morphology Fruits Fruiting calyx
Fruiting calyx (8–)10-lobed, strongly zygomorphic, 9–13 mm long at dorsal side, 11–15 mm long at the ventral side, and often with a ± recurved lip at the ventral side; lobes unequal, 0.2–2 mm long
Morphology Reproductive morphology Flowers Corolla
Corolla 7–12 mm long; lower lip slightly to distinctly longer than upper lip
Morphology Reproductive morphology Flowers Gynoecium Style
Style-branches very unequal
Morphology Reproductive morphology Fruits
Nutlets oblong, 2–2.5 × 0.8–1 mm, glossy, apex rounded and glandular.

[FTEA]

Lamiaceae (Labiatae), A.J. Paton, G. Bramley, O. Ryding, R.M. Polhill, Y.B. Harvey, M. Iwarsson, F. Willis, P.B. Phillipson, K. Balkwill, C.W. Lukhoba, D.F. Otieno, & R.M. Harley. Leucas, G. Bramley. Flora of Tropical East Africa. 2009

Type
Types: India, Koenig s.n. & Yemen, Forsskål s.n. (C, syn.)
Morphology General Habit
Annual herb, 30–90 cm high, with erect stems, sometimes branching
Morphology Stem
Stems pubescent with short downward curving hairs, rarely densely pubescent
Morphology Leaves
Leaves petiolate or appearing ± sessile; blades ovate to narrowly ovate to lanecolate, 2–7 × 0.6–5 cm, margins broadly serrate to crenate-serrate, apex acute to ± obtuse, base ± cuneate to shortly attenuate, upper surface pubescent with short appressed eglandular hairs, lower surface pubescent with appressed hairs, more plentiful on venation, also with scattered yellow sessile glands; petioles 6–20 mm long, pubescent with appressed hairs
Morphology Reproductive morphology Inflorescences
Inflorescence of 2–4 verticils spaced 12–50 mm apart, usually laxly spaced, becoming more congested near apex; verticils congested with many flowers in each cyme; pedicels ± 1 mm long; bracteoles linear to narrowly oblanceolate, 5–10 mm long, pubescent with patent hairs, with occasional yellow sessile glands, usually curved up around the verticils
Morphology Reproductive morphology Flowers Calyx
Calyx narrowly funnel-shaped, tube 5–7 mm (8–11 mm long with anterior lip) at anthesis, extending 1–2 mm in fruit, the anterior side somewhat to conspicuously deflexed, pubescent with short hairs near the bottom of the tube and near the teeth apices, the hairs longer, patent and more plentiful along the vein ridges, also with yellow sessile glands, inner surface with short appressed hairs; throat asymmetric, the anterior side 1–5 mm longer than the posterior; lobes 10, 5 on each lip, subequal, narrowly to broadly triangular at base, 0.5–1 mm, with short spinescent tips 0.5–1 mm long, the central three teeth on each lip larger
Morphology Reproductive morphology Flowers Corolla
Corolla white, 6–10 mm long; tube 4–6 mm long, outer surface with appressed hair, inner surface with an undulate band of short glandular hairs halfway down the tube, sometimes only vaguely apparent; posterior lip 1–4 mm long; anterior lip 2–5 mm long, inner surface with patch of papillae near the corolla mouth, outer surface pubescent and with yellow sessile glands
Morphology Reproductive morphology Fruits
Nutlets 2–2.4 mm long, upper surface with big sessile glands and other smaller stalked glands.

Native to:

Afghanistan, Eritrea, Ethiopia, India, Iran, Kenya, Mauritania, Oman, Pakistan, Saudi Arabia, Socotra, Somalia, Sudan, Tanzania, West Himalaya, Yemen

Leucas urticifolia (Vahl) Sm. appears in other Kew resources:

First published in A.Rees, Cycl. 20: n.° 4 (1812)

Accepted by

  • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • 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.
  • Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.
  • Paton, A.J., Bramley, G., Ryding, O., Polhill, R., Harvey, Y., Iwarsson, M., Willis, F., Phillipson, P., Balkwill, K., Lukhoba, C., Otiend, D & Harley (2009). Lamiaceae (Labiatae) Flora of Tropical East Africa: 1-430.
  • Thulin, M. (ed.) (2006). Flora of Somalia 3: 1-626. The Royal Botanic Gardens, Kew.

Literature

Flora of Somalia

  • Flora Somalia, (2000) Author: by O. Ryding [updated by M. Thulin 2008]
  • Pickering, H. & Awale, A. I. (2018). Introduction to plants in Central Somaliland. Ponte Invisibile, Redsea Cultural Foundation.

Flora of Tropical East Africa

  • A. Rees, Cycl. 20 [without pagination] (1812) [generic position suggested by Robert Brown, Prodr. Fl. Nov. Holl.: 564 (1810) but new combination not properly made]
  • Benth., Lab. Gen. Sp.: 605 (1834)
  • Blundell, Wild Fl. E. Afr.: 404, t. 137 (1987)
  • DC., Prodr. 12: 524 (1848)
  • F.P.S. 3: 216 (1956)
  • F.T.A. 5: 489 (1900)
  • Fl. Eth. 5: 546 (2006).
  • Fl. Somalia 3: 329 (2006)
  • Stuttgarter Beitr. Naturk., ser. A, 341: 133 (1980)
  • U.K.W.F. ed. 2: 286 (1994)

  • 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

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. 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 2022. 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

  • Kew Science Photographs

    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/