Book contents
- Frontmatter
- Contents
- Introduction
- List of symbols and abbreviations
- 1 Species associations
- 2 Vegetation in West Africa
- 3 Annonaceae – soursop family
- 4 Amaranthaceae – amaranth family
- 5 Cucurbitaceae – gourd family
- 6 Ochnaceae – ironwood family
- 7 Combretaceae – afara family
- 8 Guttiferae (Clusiaceae) – butter tree family
- 9 Sterculiaceae – cocoa family
- 10 Bombacaceae – silk cotton family
- 11 Malvaceae – cotton family
- 12 Euphorbiaceae – cassava family
- 13 Caesalpiniaceae – pride of Barbados family
- 14 Mimosaceae – Acacia family
- 15 Papilionaceae – cowpea family
- 16 Ulmaceae – afefe family
- 17 Moraceae – mulberry family
- 18 Meliaceae – mahogany family
- 19 Sapindaceae – akee apple family
- 20 Anacardiaceae – cashew nut family
- 21 Sapotaceae – sheabutternut family
- 22 Apocynaceae – frangipani family
- 23 Asclepiadaceae – blood flower or milkweed family
- 24 Rubiaceae – abura family
- 25 Compositae (Asteraceae) – Tridax family
- 26 Solanaceae – tomato family
- 27 Convolvulaceae – sweet potato family
- 28 Bignoniaceae – jacaranda family
- 29 Acanthaceae – Thunbergia family
- 30 Verbenaceae – teak family
- 31 Labiatae (Lamiaceae) – Hausa potato family
- 32 Commelinaceae – day flower family
- 33 Zingiberaceae – ginger family
- 34 Marantaceae – (West Indian) arrowroot family
- 35 Liliaceae – lily family
- 36 Araceae – cocoyam family
- 37 Palmae (Arecaceae) – palm family
- 38 Orchidaceae – orchid family
- 39 Cyperaceae – sedge family
- 40 Gramineae (Poaceae) – grass family
- General bibliography
- Index of family, generic and common names
31 - Labiatae (Lamiaceae) – Hausa potato family
Published online by Cambridge University Press: 02 November 2009
- Frontmatter
- Contents
- Introduction
- List of symbols and abbreviations
- 1 Species associations
- 2 Vegetation in West Africa
- 3 Annonaceae – soursop family
- 4 Amaranthaceae – amaranth family
- 5 Cucurbitaceae – gourd family
- 6 Ochnaceae – ironwood family
- 7 Combretaceae – afara family
- 8 Guttiferae (Clusiaceae) – butter tree family
- 9 Sterculiaceae – cocoa family
- 10 Bombacaceae – silk cotton family
- 11 Malvaceae – cotton family
- 12 Euphorbiaceae – cassava family
- 13 Caesalpiniaceae – pride of Barbados family
- 14 Mimosaceae – Acacia family
- 15 Papilionaceae – cowpea family
- 16 Ulmaceae – afefe family
- 17 Moraceae – mulberry family
- 18 Meliaceae – mahogany family
- 19 Sapindaceae – akee apple family
- 20 Anacardiaceae – cashew nut family
- 21 Sapotaceae – sheabutternut family
- 22 Apocynaceae – frangipani family
- 23 Asclepiadaceae – blood flower or milkweed family
- 24 Rubiaceae – abura family
- 25 Compositae (Asteraceae) – Tridax family
- 26 Solanaceae – tomato family
- 27 Convolvulaceae – sweet potato family
- 28 Bignoniaceae – jacaranda family
- 29 Acanthaceae – Thunbergia family
- 30 Verbenaceae – teak family
- 31 Labiatae (Lamiaceae) – Hausa potato family
- 32 Commelinaceae – day flower family
- 33 Zingiberaceae – ginger family
- 34 Marantaceae – (West Indian) arrowroot family
- 35 Liliaceae – lily family
- 36 Araceae – cocoyam family
- 37 Palmae (Arecaceae) – palm family
- 38 Orchidaceae – orchid family
- 39 Cyperaceae – sedge family
- 40 Gramineae (Poaceae) – grass family
- General bibliography
- Index of family, generic and common names
Summary
A cosmopolitan family, mainly of herbs, represented in West Africa by erect perennial herbs and undershrubs rarely over 2 m high, and a very few shrubs, in savanna and upland grassland. Apart from a few weed or culinary species introduced from the New World, our flora has only Old World affinities. Almost all West African genera have at least one species which also occurs in other parts of tropical Africa, sometimes in southern Africa and the Old World tropics in general as well; but within West Africa, most species have only local distributions. Gambia is recorded as having only five species (four genera), only Leucas martinicensis being indigenous.
Members of the family may be recognised by their four-sided stems bearing simple, exstipulate opposite or whorled leaves, which are often glandular and generally aromatic when crushed, small, toothed and either petiolate or sessile. Only lcomum (one to two species of tiny herbs in Guinée) has alternative leaves. The flowers are small, two-lipped, with four stamens, which usually lie on, or rise from, the bottom lip in West African species. White, pink, blue, violet and purple are common flower colours; yellow, orange and red are quite rare. Inflorescences are short axillary cymes, assembled in various ways into, for example, terminal and axillary interrupted spikelike structures (Ocimum), dense cone-like ‘spikes’ (Haumaniastrum, Hyptis), globular nodal clusters (Leonotis) or lax, spreading panicles (Englerastrum, Hoslundia). There is some doubt as to whether Haumaniastrum can be maintained as a genus separate from Acrocephalus (Robyns, 1966).
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- Chapter
- Information
- Flowering Plants in West Africa , pp. 258 - 263Publisher: Cambridge University PressPrint publication year: 1988