Villadia

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Villadia
Villadia batesii

Villadia batesii

Systematics
Nuclear eudicotyledons
Order : Saxifragales (Saxifragales)
Family : Thick-leaf family (Crassulaceae)
Subfamily : Sempervivoideae
Tribe : Sedeae
Genre : Villadia
Scientific name
Villadia
rose

Villadia is a genus of plants fromthe thick-leaf family (Crassulaceae). The botanical name of the genus honors the Mexican doctor and naturalist Manuel Maria Villada (1841-1924).

description

The species of the genus Villadia are bare perennial herbaceous plants or small shrubs with thickened spindle-shaped or fibrous roots . They reach heights of growth of 5 to 60 (rarely 90) centimeters and branch out abundantly from the bottom to the middle. In the species that grow as small shrubs, the shoots are mostly upright and largely woody and persistent. In the cushion-forming species, the shoots are herbaceous, only lignified at the base and more or less prostrate and ascending. The alternately arranged leaves are usually somewhat spread out to ascending and somewhat elongated to linear in shape. They are usually a bit round-stemmed and straight, pointed or blunt and more or less clearly spurred at the base. Their mostly bald, and more or less green leaf blades are 6 to 23 millimeters long (rarely 3 to 40 millimeters) and 1.5 to 3 millimeters wide (rarely 1 to 15 millimeters).

The more or less upright inflorescence is an ear, grape or mostly thyrse and is 2 to 20 (rarely 40) centimeters long. The flowers are five-fold (rarely four-fold) and obdiplostemon . Their flower stalks are almost absent or very short. The mostly green, almost free, mostly almost identical sepals are ascending to somewhat spread out, more or less elongated lanceolate or elongated ovoid, blunt or pointed. The corolla is shaped differently, often pentagonal at the base and reaches a diameter of 3 to 9 millimeters. The mostly whitish to pink petals are more or less ovate to elliptical-elongated and often keeled dorsally. They are 3 to 6 millimeters (rarely up to 9 millimeters) long and 1.2 to 2 millimeters (rarely up to 3 millimeters) wide. The flower tube is 0.5 to 1.6 millimeters (rarely up to 4 millimeters) long.

The fruit is a follicle fruit . The more or less brown seeds contained therein are somewhat spindle-shaped. Your seed coat is central papilla.

Systematics and distribution

The genus Villadia is common in the southern United States , Mexico , Guatemala, and Peru , where they grow primarily on rocky locations in mountainous and highland regions. The first description was made by Joseph Nelson Rose in 1903. According to Joachim Thiede , the genus Villadia consists of the following species:

Other types recognized by other authors are:

proof

literature

  • Urs Eggli (ed.): Succulent lexicon. Crassulaceae (thick leaf family) . Eugen Ulmer, Stuttgart 2003, ISBN 3-8001-3998-7 , pp. 384-391 .
  • Walter Erhardt among others: The big pikeperch. Encyclopedia of Plant Names . Volume 2. Verlag Eugen Ulmer, Stuttgart 2008. ISBN 978-3-8001-5406-7
  • The Plantlist. Retrieved July 3, 2013.

Individual evidence

  1. ^ Bulletin of the New York Botanical Garden . Volume 3, No. 9, p. 3, 1903.
  2. ↑ Urs Eggli: Villadia . In: Urs Eggli: Succulents Lexicon Volume 4. Crassulaceae (thick-leaf plants) . 2003, pp. 384-391

Web links

Commons : Villadia  - collection of images, videos and audio files