Itzaea sericea
| Itzaea sericea | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Itzaea | ||||||||||||
| Standl. & Steyerm. | ||||||||||||
| Scientific name of the species | ||||||||||||
| Itzaea sericea | ||||||||||||
| (Standl.) Standl. & Steyerm. |
Itzaea sericea is the only kind of plant genus Itzaea from the family of wind plants (Convolvulaceae). The species is common in Central America.
description
Vegetative characteristics
Itzaea sericea is a large, woody liana that reaches lengths of over 15 m. The trunks are dense and finely haired with silky hair. The leaves have 1.5 to 3.5 cm long petioles and 7 to 13 cm long and 3.5 to 6.5 cm wide, elliptically elongated or elliptically ovate, entire leaf blades . Towards the front they are blunt to tapering to a point, at the base they are slightly heart-shaped to pointed. The upper side of the leaves is hairless, the underside is densely hairy, shiny and silky.
Inflorescences and flowers
The individually in the axils standing inflorescences are cymes shaped and consist of few to many flowers . The inflorescence stalks are very short, the flower stalks are 3 to 4 mm long. The sepals are about 4 mm long, slightly different in length and almost round. The outside is silky hairy, the inside is hairless. The small, green crown has a length of 1 cm and is bell-shaped, weakly five-lobed and silky hairy on the outside. The stamens start in the corolla tube and protrude slightly beyond the corolla. The stamens are elongated and slightly broadened at the base. The anthers are elongated. The ovary is unilocular, forms four ovules and is hairy matted. The two styles are short and have two large, spherical-head-shaped scars .
Fruits and seeds
The fruits are almost spherical capsules that reach a diameter of about 13 mm and are hairless. They are slightly lignified, have a dry pericarp and initially spring up from the top with three or four flaps, later they divide into a multitude of straight, lengthways segments that are reminiscent of the staves of a barrel. The three to four seeds are hairless and are surrounded by a bright red pulp.
distribution
The species is distributed in Central America and is known there from Mexico, Guatemala , Belize , from the Atlantic coast of Honduras and from Nicaragua.
Botanical history and etymology
The species was first described in 1931 by Paul Carpenter Standley with the name Lysiostyles sericea . The genus Itzaea was established in 1944 by Standley and Julian Alfred Steyermark with Itzaea sericea as the only species. The name of the genus is derived from the Itzá -Mayas.
Systematics
Within the bindweed family, the genus is provisionally classified in the tribe of Cresseae according to molecular biological knowledge .
swell
Individual evidence
- ↑ Rafaël Govaerts (ed.): Itzaea. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved November 22, 2017.
- ^ Saša Stefanović, Daniel Austin and Robert Olmstead: Classification of Convolvulaceae: A Phylogenetic Approach. In: Systematic Botany , Volume 28, Number 4, 2003. Pages 791-806. doi : 10.1043 / 02-45.1 (currently unavailable) ( online )
literature
- Paul Carpenter Standley, Louis O. Williams, and Dorothy N. Gibson: Flora of Guatemala , Fieldiana: Botany, Volume 24, Part IX, Numbers 1-4, Field Museum of Natural History, 1970-1973.