Agave debilis
| Agave debilis | ||||||||||||
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| Agave debilis | ||||||||||||
| A. Berger |
Agave debilis is a species of agave ( agave ) in the subfamily of the agave family (Agavoideae). The specific epithet debilis comes from Latin , means 'weak' and refers to the leaves of the species.
description
Agave debilis reproduces vegetatively through horizontal rhizomes . The cylindrical or rarely egg-shaped rhizomes are 2 to 4 (rarely from 1) centimeters long and 1.3 to 2 centimeters wide. Their fibrous vertical roots are semi-fleshy. The two to six (rarely up to 8) spread out upright, somewhat succulent leaves are slightly runny or occasionally slightly wavy. Their point is pointed and has a medium-sized point. The smooth dark green, sometimes spotted leaf blade is 14 to 56 centimeters long and 0.8 to 2.2 (rarely up to 2.8) centimeters wide. The narrow hyaline leaf margins are occasionally lined a little purple-red, papillate to gnawed-serrated and are usually rough to the touch. The remains of the leaf bases are fibrous and 4 to 9 inches long.
The "eared" inflorescence reaches a height of 91.3 to 135 (rarely 28 to 149) centimeters. The short, compact, flower-bearing part is 2.5 to 7.5 (rarely up to 11) centimeters long and has five to 18 seated, almost upright flowers that are slightly curved at the connection between the ovary and the perigone tube . The ellipsoid ovary is 9 to 11 (rarely up to 12) millimeters long. The cylindrical perigone tube is slightly widened towards its mouth and not constricted over the ovary. It has a length of 9 to 15 millimeters and is 3 to 5 millimeters wide in the middle. The elongated, rolled back, green or purple-colored Perigonzipfel are 8 to 11 (rarely up to 16) millimeters long. The stylus protrudes over the flower tube by 30 to 48 millimeters. The club-shaped scars are triangular and gently furrowed. The flowering period extends from mid-July to mid-September.
The spherical fruits are 1.5 to 1.8 inches long and 1.3 to 1.5 inches wide. They contain seeds 3 to 4 millimeters long and 4 to 5 millimeters wide.
Systematics and distribution
Agave debilis is widespread in the Mexican Distrito Federal and in the states of Hidalgo , México , Morelos , Michoacán , Oaxaca and Puebla in moist pine forests or pine-oak heather formations at altitudes of 1830 to 2960 meters.
The first description by Alwin Berger was published in 1915. Synonyms are Manfreda angustifolia Rose (in schedula, without year, nom. Inval. ICBN -Article 29.1), Manfreda pringlei Rose and Polianthes debilis (A.Berger) Shinners .
The species belongs to the subgenus Manfreda and is assigned to the Manfreda group there.
proof
literature
- Joachim Thiede: Agave debilis . In: Urs Eggli (Hrsg.): Succulent lexicon. Monocotyledons . Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3662-7 , pp. 24 .
Individual evidence
- ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 62.
- ↑ Alwin Berger: The agaves. Contribution to a monograph . Gustav Fischer Verlag, Jena 1915, p. 33.
- ^ 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. 19 (online) .
- ↑ Lloyd Herbert Shinners: Texas Polianthes, including Manfreda (Agave subgenus Manfreda) and Runyonia (Agavaceae) . In: Sida . Volume 2, Number 4, 1966, p. 337 (online) .