Hewittia malabarica
| Hewittia malabarica | ||||||||||||
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Hewittia malabarica |
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Hewittia | ||||||||||||
| Wight & Arnott, Madras | ||||||||||||
| Scientific name of the species | ||||||||||||
| Hewittia malabarica | ||||||||||||
| ( L. ) Suresh |
Hewittia malabarica is the only plant species of the genus Hewittia from the family of wind plants (Convolvulaceae). It occurs in tropical regions of Africa and Asia ; in Jamaica she is a neophyte .
description
Hewittia malabarica are twisting or prostrate, perennial, herbaceous plants that reach heights of 1 to 2 m. The shoot axes are more or less finely haired, and roots often form at the nodes . The leaves are on 1 to 6 cm long petioles , the leaf blades are egg-shaped, 3 to 10 cm long and 3 to 8 cm wide. They are covered with adjacent trichomes or almost hairless, occasionally they are also dotted with glands. The leaf margin is ciliate, entire or the leaf is multi-lobed, the leaf base is heart-shaped, spear-shaped or cut off. To the front, the leaves are pointed, prickly or with a long tip.
The plants bloom all year round and also produce fruit all year round. The inflorescences usually consist of only one flower . These stand on 1.5 to 10 cm long inflorescence stalks , the bracts are elongated-lanceolate, pointed towards the front, finely hairy and 0.7 to 1.5 cm long. The flower stalk is 2 to 4 mm long. The hermaphrodite, radially symmetrical flowers are five-fold. The five sepals are irregularly shaped, finely hairy on the outward-facing side. The outer three sepals are broadly ovate, 0.9 to 1.5 cm long and 0.6 to 0.9 cm wide. The inner two sepals are elongated-lanceolate and slightly shorter. The crown is 2 to 2.5 cm long, pale yellow or whitish with a purple center. A strip with dense, fine hairs runs along the middle of the individual petals. The stamens are 9 mm long, the filaments are finely haired at the base, the anthers are egg-shaped-triangular. The upper ovary is hairy shaggy.
The pressed-in spherical capsule fruits are surrounded by the constant and expanding calyx. They have a diameter of 8 to 10 mm, are finely haired and contain a maximum of four seeds. The seeds are dull black, ovate-triangular and 4 to 6 mm long. The hilum is finely haired, the rest of the seed surface is hairless.
The chromosome number is .
Occurrence
Hewittia malabarica is native to Africa and Asia , and is also found as an introduced plant in Jamaica . It grows in sunny locations on mostly sandy soil in thickets, on roadsides, on cleared forest areas, on river banks and in plantations. In China it occurs at altitudes between 0 and 600 m.
Taxonomy
It was first published in 1753 under the name ( Basionym ) Convolvulus malabaricus by Carl von Linné . The new combination to Hewittia malabarica (L.) Suresh was published in 1988 by Cheriyachanasseri Ramachandran Suresh . Other synonyms for Hewittia malabarica (L.) Suresh are: Hewittia asarifolia Klotzsch , Hewittia barbeyana Chod. & Roulet , Hewittia bicolor (Vahl) Wight & Arn. , Hewittia hirta Klotzsch , Hewittia puccioniana (Chiov.) Verdc. , Hewittia scandens (Milne) Mabb. , Hewittia sublobata (Lf) Kuntze .
swell
- Fang Rhui-cheng, George Staples: Hewittia malabarica , In: ZY Wu, PH Raven (Eds.) Flora of China , Volume 16, Science Press, Peking and Missouri Botanical Garden Press, St. Louis, 1995, p. 285.
Individual evidence
- ↑ Rafaël Govaerts (ed.): Hewittia malabarica. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved November 29, 2017.
