Inflorescences
of spaced verticils; verticils dense, often glomerate, many-flowered; bracts leaf-like, becoming smaller towards apex; bracteoles usually present, linear-subulate; flowers sessile
Calyx
tubular, widening towards mouth, 5-10-nerved, densely hairy inside mouth; teeth 10, subequal, spine-tipped, recurved or hooked
Corolla
small, white to purplish; tube included in calyx, glabrous or with a ring of hairs within; upper lip erect, almost flat or concave, almost entire to deeply 2-fid; lower lip slightly longer than upper, spreading, 3-fid, middle lobe broader and emarginate
Stamens
4, didynamous, included in corolla lobe, anterior pair the longer; anthers 2-thecous, thecae divaricate, confluent
Style
2-lobed at apex, lobes obtuse
Nutlets
ovoid, smooth truncate at apex
x = 17 (7, 9) (polyploidy)
Nomenclature:
*Marrubium
L.
Linnaeus: 582 (1753)
Linnaeus: 254 (1754)
Bentham: 1206 (1876)
Briquet: 230 (1896)
Cullen: 137 (1972)
Codd: 25 (1985)
Distribution & Notes:
Global
: Species 30, natives of Europe, N Africa and Asia
Southern Africa
: Species 1: *
Marrubium vulgare
L. from Europe is now a widespread weed in E Free State, Lesotho and Eastern Cape
References:
BENTHAM, G. 1876.
Labiatae
. In G. Bentham & J.D. Hooker,
Genera plantarum
2. Lovell Reeve & Co., Covent Garden
BRIQUET, J. 1895-1897.
Labiatae
.
Die natürlichen Pflanzenfamilien
4,3a
CODD, L.E. 1985.
Lamiaceae
.
Flora of southern Africa
28
CULLEN, J. 1972.
Marrubium
.
Flora europaea
3
LINNAEUS, C. 1753.
Species plantarum
. Salvius, Stockholm
LINNAEUS, C. 1754.
Genera plantarum
, edn 5. Salvius, Stockholm
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