- Family: Orobanchaceae Vent.
Striga Lour.
[FTEA]
Scrophulariaceae, S.A. Ghazanfar, F.N. Hepper & D. Philcox. Flora of Tropical East Africa. 2008
- Morphology General Habit
- Annual, rarely perennial herbs, semi-parasitic on roots, hirsute or scabrous, often turning black on drying
- Morphology Roots
- Root system greatly condensed, adventitious roots arising from subterranean scales, these fine roots terminated by small (1–2 mm diameter) haustoria, in some species a large (to 5 cm) primary haustorium present.
- Morphology Stem
- Stems stiffly erect, usually ridged
- Morphology Leaves
- Leaves opposite or subopposite, sessile or subsessile, reduced to small scales near the base of the stem in most species
- Morphology Reproductive morphology Inflorescences
- Inflorescence a spike, flowers in axils of bracts or in dense heads
- Morphology Reproductive morphology Inflorescences Bracts
- Bracts leaf-like or reduced; bracteoles 2
- Morphology Reproductive morphology Flowers Calyx
- Calyx tubular, 5-lobed or with 5 (rarely 4) teeth, in some species intercostal veins present
- Morphology Reproductive morphology Flowers Corolla
- Corolla with a narrow tube and expanded 2-lipped limb; tube bent at right angles; upper lobes fused, lower 3 lobes spreading
- Morphology Reproductive morphology Flowers Androecium Stamens
- Stamens 4, didynamous, inserted in the tube below the mouth; anthers monothecal, basifixed on short filaments
- Morphology Reproductive morphology Flowers Gynoecium
- Style usually persistent; stigma bifid
- Morphology Reproductive morphology Flowers Nectaries
- Nectary present at base of ovary
- Morphology Reproductive morphology Fruits
- Capsule loculicidal
- Morphology Reproductive morphology Seeds
- Seeds minute (“dust seeds”) with prominent encircling ridges.
- Ecology
- Semi-parasitic on roots of grasses, cereal crops and a wide range of other hosts; several species are serious cereal pests (especially of sorghum) in drier parts of West Africa.
[FSOM]
M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS
- Morphology General Habit
- Annual or perennial hemiparasitic herbs, hirsute, pilose or scabrid; stems simple or branched mainly from above middle, stiffly erect, square or terete
- Morphology Leaves
- Leaves opposite or subopposite, reduced to small scales at the base
- Morphology Reproductive morphology Inflorescences
- Inflorescence a dense or lax terminal spike or raceme
- Morphology Reproductive morphology Flowers Perianth
- Calyx tubular, (4–)5(–8)-lobed; lobes equal or subequal. Corolla-tube cylindrical with an acute bend; limb 2-lipped, upper lip 2-fid or emarginate, lower lip 3-lobed
- Morphology Reproductive morphology Flowers Androecium Stamens
- Stamens 4, 2 long and 2 short, included; anthers with 1 theca only
- Morphology Reproductive morphology Flowers Gynoecium Style
- Style persistent; stigma clavate
- Morphology Reproductive morphology Fruits
- Capsule oblong or subovoid, with loculicidal dehiscence
- Morphology Reproductive morphology Seeds
- Seeds dust-like, minute, with prominent ornamented ridges.
- Distribution
- Genus of some 50 species in the Old World tropics, well represented in Africa.
- Note
- In addition to the species treated here the following species known from adjacent countries may well turn up in Somalia: S. yemenica Musselman & Hepper, S. hermonthica (Del.) Benth., S. aspera (Willd.) Benth., and S. pubiflora Klotzsch. Species of Striga (witchweeds) are among the most specialized of all root-parasites and some of them cause severe damage to cultivated crops especially in semi-arid regions of Africa.
[FZ]
Scrophulariaceae, D. Philcox. Flora Zambesiaca 8:2. 1990
- Morphology General Habit
- Annual, rarely perennial, hirsute or scabrous root-parasitic herbs.
- Morphology Roots
- Root system greatly condensed, adventitious roots arising from subterranean scales, these fine roots terminated by small (1–2 mm. in diam.) haustoria, in some species a large (to 5 cm.) primary haustorium present.
- Morphology Stem
- Stems stiffly erect, green or grey, usually square in transverse section, of ten ridged.
- Morphology Leaves
- Leaves opposite or nearly so, sessile or subsessile, reduced to small scales near the base of the stem in most species.
- Morphology Reproductive morphology Inflorescences
- Inflorescence a spike, flowers in axils of leaves (bracts) or in dense heads.
- Morphology Reproductive morphology Inflorescences Bracteoles
- Bracts leaf-like or reduced, bracteoles 2.
- Morphology Reproductive morphology Flowers Calyx
- Calyx tubular, 5-lobed or with 5 (rarely 4) teeth, in some species intracostal veins occur.
- Morphology Reproductive morphology Flowers Corolla
- Orifice of tube small, less than 1 mm. in diam. with hairs abundant at orifice. Corolla with a narrow tube and expanded bilabiate limb. Upper lobes fused, erect, lower lobes 3, spreading.
- Morphology Reproductive morphology Flowers Androecium Stamens
- Stamens 4, didynamous, inserted in the tube below the orifice.
- Morphology Reproductive morphology Flowers Androecium Stamens Anthers
- Anthers unilocular, basifixed on short filaments.
- Morphology Reproductive morphology Flowers Pollen
- Pollen sparse, of ten sticky.
- Morphology Reproductive morphology Flowers Gynoecium Pistil
- Pistil tubular with numerous minute ovules.
- Morphology Reproductive morphology Flowers Gynoecium Style
- Style terete, elongate, stigma bifid.
- Morphology Reproductive morphology Flowers Nectaries
- Nectary present at base of ovary.
- Morphology Reproductive morphology Fruits
- Dehiscence loculicidal. Capsule cylindric or subovoid, style usually persistent.
- Morphology Reproductive morphology Seeds
- Embryo small. Seeds minute (“dust seeds”) with prominent encircling ridges. Seedlings achlorophyllous, squamate. Germination hypogeal and cryptocotylar.
Native to:
Aldabra, Andaman Is., Angola, Assam, Bangladesh, Benin, Botswana, Burkina, Burundi, Cambodia, Cameroon, Cape Provinces, Cape Verde, Central African Repu, Chad, China South-Central, China Southeast, Cocos (Keeling) Is., Congo, Djibouti, East Himalaya, Egypt, Eritrea, Ethiopia, Free State, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Hainan, India, Ivory Coast, Kenya, KwaZulu-Natal, Laccadive Is., Laos, Lesotho, Lesser Sunda Is., Liberia, Madagascar, Malawi, Malaya, Mali, Maluku, Mauritania, Mauritius, Morocco, Mozambique, Mozambique Channel I, Myanmar, Namibia, Nepal, New Guinea, Nicobar Is., Niger, Nigeria, Northern Provinces, Northern Territory, Oman, Pakistan, Philippines, Queensland, Rodrigues, Rwanda, Réunion, Saudi Arabia, Senegal, Seychelles, Sierra Leone, Socotra, Somalia, Sri Lanka, Sudan, Sumatera, Swaziland, Taiwan, Tanzania, Thailand, Togo, Uganda, Vietnam, West Himalaya, Western Australia, Western Sahara, Yemen, Zambia, Zaïre, Zimbabwe
Introduced into:
Chagos Archipelago, Florida, North Carolina, South Carolina
- Striga aequinoctialis A.Chev. ex Hutch. & Dalziel
- Striga alba Pennell
- Striga angolensis K.I.Mohamed & Musselman
- Striga angustifolia (D.Don) C.J.Saldanha
- Striga asiatica (L.) Kuntze
- Striga aspera (Willd.) Benth.
- Striga barthlottii Eb.Fisch., Lobin & Mutke
- Striga baumannii Engl.
- Striga bilabiata (Thunb.) Kuntze
- Striga brachycalyx Skan
- Striga chrysantha A.Raynal
- Striga crispata Sheng Z.Yang, Zi X.Chen, Chien F.Chen & P.H.Chen
- Striga curviflora (R.Br.) Benth.
- Striga dalzielii Hutch.
- Striga densiflora (Benth.) Benth.
- Striga dewevrei De Wild. & T.Durand
- Striga diversifolia Pires de Lima
- Striga elegans Benth.
- Striga ellenbergeri A.Raynal
- Striga flava Miq.
- Striga forbesii Benth.
- Striga fulgens (Engl.) Hepper
- Striga gastonii A.Raynal
- Striga gesnerioides (Willd.) Vatke
- Striga glumacea A.Raynal
- Striga gracillima Melch.
- Striga hallei A.Raynal
- Striga hermonthica (Delile) Benth.
- Striga indica K.M.P.Kumar, P.Jayanthi, A.Rajendran & M.Sabu
- Striga junodii Schinz
- Striga kamalii Omalsree, K.M.P.Kumar, M.Sabu & Sunojk.
- Striga klingii (Engl.) Skan
- Striga latericea Vatke
- Striga lepidagathidis A.Raynal
- Striga linearifolia (Schumach. & Thonn.) Hepper
- Striga macrantha (Benth.) Benth.
- Striga magnibracteata Eb.Fisch. & I.Darbysh.
- Striga masuria (Buch.-Ham. ex Benth.) Benth.
- Striga micrantha A.Rich.
- Striga multiflora Benth.
- Striga musselmanii Omalsree & V.K.Sreenivas
- Striga parviflora (R.Br.) Benth.
- Striga passargei Engl.
- Striga pinnatifida Getachew
- Striga primuloides A.Chev.
- Striga pubiflora Klotzsch
- Striga schlechteri Pennell
- Striga scottiana Jeeva, Shyn.Brintha & Rasingam
- Striga spanogheana Miq.
- Striga squamigera W.R.Barker
- Striga strigosa R.D.Good
- Striga sulphurea Dalzell
- Striga yemenica Musselman & Hepper
Striga Lour. appears in other Kew resources:
Date | Reference | Identified As | Barcode | Type Status |
---|---|---|---|---|
Aug 26, 2003 | Laycock, D. [7463], Indonesia | K000183455 | ||
Milne-Redhead, E. [4161], Angola | 35210.000 | |||
Collenette, I.S. [6423], Saudi Arabia | 51532.000 | |||
Collenette, I.S. [6904], Saudi Arabia | 53238.000 | |||
Collenette, I.S. [7761], Saudi Arabia | 56125.000 | |||
Ash [518], Ethiopia | 71416.000 |
First published in Fl. Cochinch.: 22 (1790)
Accepted by
- Boudet, G., Lebrun, J.P. & Demange, R. (1986). Catalogue des plantes vasculaires du Mali: 1-465. Etudes d'Elevage et de Médecine Vétérinaire des Pays Tropicaux.
Literature
Flora of West Tropical Africa
- —F.T.A. 4, 2: 399.
Flora Zambesiaca
- Fl. Cochinch.: 22 (1790).
Flora of Somalia
- Flora Somalia, Vol 3, (2006) Author: by K.I. Mohamed & L.J. Musselman [updated by M. Thulin 2008]
- Mohamed, Musselman & Riches in Ann. Missouri Bot. Gard. 88: 60–103 (2001).
Flora of Tropical East Africa
- F.T.A. 4(4): 399 (1906)
- Fl. Cochinch.: 22 (1790)
Flora Zambesiaca
Flora Zambesiaca
http://creativecommons.org/licenses/by-nc-sa/3.0
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
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Kew Backbone Distributions
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© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0
Kew Names and Taxonomic Backbone
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© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0
Plants and People Africa
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