Agave brunnea
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| Agave brunnea | ||||||||||||
| S. Watson |
Agave brunnea is a species of the agave genus( Agave ) in the subfamily of the agave family (Agavoideae). The specific epithet brunnea comes from Latin , means 'brown' and refers to the brown inside of the flowers.
description
Agave brunnea is robust and reproduces vegetatively through buds from the rhizome below the leaf bases. The rhizomes are usually elongated, about 2 inches long and 0.9 to 2.5 inches wide. Their roots are fleshy. The four to eight succulent, somewhat glaucoma and red marbled leaves are linear-lanceolate to broadly lanceolate and smooth. They are up to 32 inches long and 1.3 to 2.9 (rarely up to 3.6) inches wide. The tip of the leaf is pointed and has a long tip. The leaf margins are serrated. The cartilaginous, mostly large, teeth are deltoid or truncated-gnawed and are 0.3 to 1.1 centimeters apart. There is a light band between the teeth on the leaf margins. The remnants of the leaf bases are membranous and disintegrate at their tip into fine fibers 5.5 to 9.5 (rarely from 4.5) centimeters in length.
The "eared" inflorescence reaches a height of up to 130 centimeters. The flower-bearing part is 6.5 to 29 centimeters long and bears nine to 19 individual, seated, almost upright flowers . The long ellipsoid ovary is 10 to 20 (rarely up to 25) millimeters long. The narrow, funnel-shaped and straight perigone tube is gradually constricted above the ovary. It is 20 to 32 (rarely 15 to 35) millimeters long. Their outside is yellowish green, the inside brown. The blunt perigone lobes are not swollen at their tips. The stylus rises above the perigone tube by 35 to 53 (rarely up to 65) millimeters. The club-shaped scars are triangular and deeply grooved. The flowering period extends from late June to August.
The ellipsoidal to elongated, woody fruits are 1.8 to 3.6 millimeters long and 1.2 to 1.6 millimeters wide. They contain seeds 5 millimeters in length and 3 to 4 millimeters in length.
Systematics and distribution
Agave brunnea is common in the Mexican states of Chihuahua and Coahuila on dry hills or desert plains, volcanic or alluvial soils at altitudes of 1125 to 1400 meters.
The first description by Sereno Watson was published in 1891. Nomenclatory synonyms are Manfreda brunnea (S.Watson) Rose (1903) and Polianthes brunnea (S.Watson) Shinners (1966).
The species belongs to the subgenus Manfreda and is assigned to the Manfreda group there.
proof
literature
- Joachim Thiede: Agave brunnea . In: Urs Eggli (Hrsg.): Succulent lexicon. Monocotyledons . Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3662-7 , pp. 18 .
Individual evidence
- ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Springer, Berlin / Heidelberg 2010, ISBN 978-3-642-05597-3 , p. 33.
- ^ Sereno Watson: Contributions to American Botany . In: Proceedings of the American Academy of Arts and Sciences . Volume 26, 1891, p. 156 (online) .
- ^ 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) .
Web links
- Herbarium evidence with the type specimen of Agave brunnea