Agave rosei

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Agave rosei
Systematics
Order : Asparagales (Asparagales)
Family : Asparagaceae (Asparagaceae)
Subfamily : Agave family (Agavoideae)
Genre : Agaves ( agave )
Subgenus : Manfreda
Type : Agave rosei
Scientific name
Agave rosei
Thiede & Eggli

Agave rosei is a species of the agave genus( agave ) in the subfamily of the agave family (Agavoideae). The specific epithet rosei honors the American botanist Joseph Nelson Rose .

description

The leaves of Agave rosei, which are not narrowed at their base, are about 30 centimeters long and 0.7 centimeters wide. Their leaf margins are indistinctly papilous .

The "eared" inflorescence is 110 centimeters long. The flower-bearing part is about 18 centimeters long and has about 10 blooming nodes. The lowest flower stalk has a length of 6 millimeters on withered flowers , otherwise from 2.5 to 4 millimeters. The tepals the flowers are white. The flower tube is curved near its base and 14 to 15 millimeters long. Their egg-shaped petals are 2.5 to 3 millimeters long and 1.5 to 2 millimeters wide. The anthers have a length of 4.5 to 4.7 millimeters, the free parts of the stamens are about 7 millimeters long.

Nothing is known about the fruits and seeds .

Systematics and distribution

Agave rosei is found in a deep canyon in the Mexican state of Nayarit . It is only known from the place where it was found.

The first description as Polianthes montana by Joseph Nelson Rose was published in 1903. Joachim Thiede and Urs Eggli placed the species in the genus Agave in 1999 . They had to choose a new name because the species Agave montana Villarreal (1996) already existed.

The species belongs to the subgenus Manfreda and is assigned to the Polianthes group there.

proof

literature

  • Joachim Thiede: Agave apedicellata . In: Urs Eggli (Hrsg.): Succulent lexicon. Monocotyledons . Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3662-7 , pp. 59 .

Individual evidence

  1. ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 205.
  2. ^ Joseph Nelson Rose: Studies of Mexican and Central American Plants - No. 3 . In: Contributions from the United States National Herbarium . Volume 8, Part 1, 1903, p. 11 (online) .
  3. ↑ Joachim Thiede, Urs Eggli: Inclusion of Manfreda Salisbury, Polianthes Linné and Prochnyanthes S. Watson in Agave Linné (Agavaceae) . In: Cacti and other succulents . Volume 50, Number 5, 1999, pp. 109-113 (online) .
  4. ↑ José Angel Villarreal-Quintanilla: Una nueva especie de Agave Subgenero Agave (Agavaceae) de Mexico . In: Sida . Volume 17, Number 1, 1996, pp. 191-195 (online) .

Web links

  • Holotype of Polianthes montana in the United States Natural Herbarium .