Striga angustifolia
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Striga angustifolia |
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| ( D.Don ) CJSaldanha |
Striga angustifolia is a plant type from the genus Striga in the family of broomrape plants (Orobanchaceae).
description
Striga angustifolia is a 10 to 50 cm tall, parasitic , annual plant . It is rigidly upright, hairy or occasionally densely covered with short, spike-haired, upwardly curved trichomes . It is usually not branched or provided with two or three branches in the middle of the stem . The stem is indistinctly square. The alternate leaves are 10 to 20 (rarely up to 30) × 1 to 3 mm in size, linearly shaped, with entire margins and with indistinct veins. They are about as long as the internodes .
The inflorescences are loose clusters in which the flowers are alternate. The inflorescences are shorter than the vegetative shoot. The flowers are accompanied by two bracts . These are 10 to 25 × 1 to 2 mm in size on the lower flowers, leaf-like and longer than the calyx . The leaves on the upper flowers are awl-like and shorter than the calyx. The calyx is provided with fifteen clearly protruding ribs, tomentose and 8 to 12 mm long. The calyx tube is 3 to 6 mm long, the five corolla lobes are of the same shape, linear to lanceolate and 3 to 6 mm long and thus the same or almost as long as the calyx tube. The crown is creamy white in color with a greenish corolla tube. This is 10 to 15 mm long, curved, widened above the calyx and densely hairy. The lobes of the lower lip are 4 to 8 × 2 to 4 mm in size and conversely egg-shaped. The upper lip is 3 to 4 × 3 to 4 mm in size, broadly inverted ovoid, notched or cut off.
Occurrence
The species occurs in East Africa in Tanzania , Malawi , Mozambique , Zambia and Zimbabwe , but does not infect cultivated plants there. In India , the species is a weed in grain and sugar cane cultivation .
swell
- Kamal I. Mohamed, Lytton John Musselman and Charles R. Riches: The Genus Striga (Scrophulariaceae) in Africa . In: Annals of the Missouri Botanical Garden , Volume 88, Number 1, Winter 2001. Pages 60-103.
