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This genus is accepted, and is native to Asia-Tropical, Africa, Australasia and Asia-Temperate.

[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 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
'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

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

Plants and People Africa
Common Names from Plants and People Africa http://www.plantsandpeopleafrica.com/
© Plants and People Africa http://www.plantsandpeopleafrica.com http://creativecommons.org/licenses/by/3.0/