Portulaca eruca
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Portulaca eruca |
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| Hauman |
Portulaca eruca is a species of plant in the genus Portulaca ( Portulaca ), the only genus of the Purslane family (Portulacaceae).
description
Portulaca eruca is perennial and forms an uneven, bulbous rhizome with dark brown bark. From this arise one or rarely several ascending to upright shoots, which can be 10 to 12 centimeters long and have very short internodes . They are not very branched or not at all and transient. The crowded leaves are spread out and petiolate. They are grass green in color, are 5 to 7 millimeters long, are short spurred and pointed at the base. Rosettes are formed in the leaf axils from shorter secondary leaves and white hairs that are longer than the leaves.
The head-like, compressed inflorescence is surrounded by 8 to 9 leaves. The large, up to 2.5 centimeters in diameter, flowers have broadly ovate to clipped sepals that are up to 4.5 millimeters long. The inner sepals are shorter. 5 petals are formed, which can be 1.0 to 1.5 centimeters, sometimes up to 2 centimeters, long. They are wrongly heart-shaped and colored bright magenta. Many stamens are formed, the stamens are dark purple and the pollen orange. The dark magenta stylus is 5 to 8 millimeters long and at its upper end there are 5 to 6, sometimes 8, scars. The 3 to 5 millimeter large fruits tear on a third to half of their length. The purple-black to lead-black seeds are 0.5 to 0.6 millimeters in size, covered with small warts and have star-shaped or irregularly rounded testa cells .
Systematics and distribution
Portulaca eruca is common in Argentina in the province of Córdoba and in the adjacent provinces.
It was first described in 1925 by Lucien Leon Hauman . A description made by Carl Curt Hosseus as early as 1921 as Portulaca cordobensis is invalid according to the rules of the ICBN .
literature
- Urs Eggli: Portulaca . In: Urs Eggli (Hrsg.): Succulent lexicon . tape 2 dicotyledons (dicotyledons). Ulmer, Stuttgart 2002, ISBN 3-8001-3915-4 , p. 435 .
Individual evidence
- ↑ Anales del Museo Nacional de Historia Natural de Buenos Aires , Volume 32, p. 440, 1925
