Amphipetalum paraguayense
| Amphipetalum paraguayense | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Amphipetalum | ||||||||||||
| Bacigalupo | ||||||||||||
| Scientific name of the species | ||||||||||||
| Amphipetalum paraguayense | ||||||||||||
| Bacigalupo |
Amphipetalum paraguayense is the only plant species of the monotypic genus Amphipetalum from the Talinaceae family .
The botanical name is derived from the Greek words amphi- for 'around', 'double' or 'different' and petalon for 'petal' and refers to the two different petal shapes.
description
Amphipetalum paraguayense grows as a perennial , herbaceous plant with halfway decrepit, loosely branched and velvety hairy shoots up to 40 centimeters in length, which arise from an elongated, thickened root . Their flat leaves are slightly succulent . The wedge-shaped to inverted heart-shaped, densely short with simple hairs occupied leaf blade is 3 to 11 inches long and 1.5 to 6.5 inches wide. The tip of the spreader is trimmed or edged. The petiole is short or absent.
The terminal, stalked, hairy inflorescence is up to 17 centimeters long. The flowers are arranged in somewhat whorled, tufted, zymose partial inflorescences . Her flower stalk , which is thickened towards the tip, is hairy and 6 to 8 millimeters long. The triangular, 1 to 2 millimeter long bracts are also hairy. The two broadly egg-shaped, blunt to marginalized sepals are green, bordered purple and hairy on the outside. The outer sepal is 3 millimeters long and 4 millimeters wide, the inner one is 5 millimeters long and 3.5 millimeters wide. The five petals are white. The two outer, egg-shaped, 5.5 to 6.5 millimeters long and 3.5 to 4 millimeters wide petals are hairy on the outside and have a purple spot on one half. Their edge is membranous and bare. The three inner obovate, edged petals are bare. They have a length of 7.5 to 9 millimeters and a width of 6 to 7.5 millimeters. There are twelve to 19 stamens , the stamens of which are mainly hairy near their base. The spherical to ovoid ovary contains 11 to 19 ovules . The thread-like stylus is thickened towards its tip. The scar is head-shaped and disc-shaped.
The fruits are dry capsule fruits that tear open from their base in three caps and are enveloped by the decaying remains of the flowers. They are 5.0 to 5.5 millimeters long and 4.0 to 4.5 millimeters wide. The capsule fruits contain eight to ten black, dull, egg-shaped, laterally compressed seeds that are 2.6 to 2.8 millimeters long and 1.5 millimeters wide. The seeds are finely warty, but appear almost smooth. The hilum has a whitish aril.
Systematics and distribution
Amphipetalum paraguayense is widespread in western Paraguay in the Boquerón department .
The first description of the genus and its single species occurs in 1988 by Nélida Maria Bacigalupo .
proof
literature
- Urs Eggli : Amphipetalum . In: Urs Eggli (Hrsg.): Succulent lexicon . Volume 2: Dicotyledons (dicotyledons), Eugen Ulmer, Stuttgart 2002, ISBN 3-8001-3915-4 , p. 397.
Individual evidence
- ↑ Nélida María Bacigalupo: 14. Amphipetalum NMBacigalupo, called nov. In: Rodolphe-Edouard Spichiger (Ed.): Notulae ad Floram parquaiensem . In: Candollea . Volume 43, 1988, pp. 409-415.
Web links
- Isotype of Amphipetalum paraguayense