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Havard's Century Plant

Agave havardiana Trel.

Comments

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Agave havardiana hybridizes with A. lechuguilla to form A. × glomeruliflora, with which it may also hybridize.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 26: 445, 450, 458 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Description

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Plants acaulescent, sparsely suckering; rosettes usually solitary, (4–)5–8 × (5–)10–15 dm, rather open. Leaves ascending, 30–60 (–70) × 15–27 cm; blade glaucous-gray to gray-green, not cross-zoned, lanceolate to broadly lanceolate, rigid, adaxially concave, abaxially convex; margins straight, armed, teeth single, well defined, (5–)7–10 mm, 1.5–2 cm apart; apical spine dark brown to gray, subulate, 3–5(–10) cm. Scape 2–7 m. Inflorescences paniculate, not bulbiferous, dense; bracts persistent, lanceolate, (3–)5–10 cm; lateral branches 12–20, slightly ascending, comprising distal 1/2–2/3 of inflorescence, longer than 10 cm. Flowers 21–48 per cluster, erect, 6.8–9 cm; perianth yellow to yellow-green, tube funnelform, 14–22 × 15–22 mm, limb lobes erect, slightly unequal, 18–24 mm; stamens long-exserted; filaments inserted irregularly ca. mid perianth tube, erect, yellow, 5–6.5 cm; anthers yellow, 25–30 mm; ovary 3–4 cm, neck constricted, 2–8 mm. Capsules short-pedicellate, oblong to obovoid, 4–5.7 cm, apex beaked. Seeds 6–7 mm.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 26: 445, 450, 458 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
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eFloras

Distribution

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Tex.; nw Mexico.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 26: 445, 450, 458 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
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eFloras

Flowering/Fruiting

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Flowering summer--early fall.
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copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 26: 445, 450, 458 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
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eFloras

Habitat

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Gravelly to rocky, often calcareous places in grasslands, desert scrub, pinyon-juniper, and oak woodlands; 1200--2000m.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 26: 445, 450, 458 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
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eFloras

Agave havardiana ( German )

provided by wikipedia DE

Agave havardiana ist eine Pflanzenart aus der Gattung der Agaven (Agave). Ein englischer Trivialname ist „Havard’s Century Plant“.

Beschreibung

Agave havardiana formt offene Rosetten, die spärlich Ausläufer bilden. Die Wuchshöhe reicht von 40 bis 60 cm mit einem Durchmesser von 50 bis 80 cm. Die lanzettförmig, variabel angeordneten, hell- gelbgrünen bis bläulichen, spitz zulaufenden Blätter sind 30 bis 60 cm lang und 15 bis 20 cm breit. Sie bildet deutliche Abdrücke der Knospe. Die Blattränder sind kräftig gezahnt und formen einen variablen hornigen Rand. Der kräftige, dunkelbraune bis graue Enddorn ist 3 bis 10 cm lang.

Der rispige Blütenstand wird 2 bis 4 m hoch. Die hellgrünen bis gelben Blüten sind 68 bis 88 mm lang und erscheinen an der Mitte bis zur Spitze des Blütenstandes an variabel angeordneten Verzweigungen. Die tief trichterige Blütenröhre ist 14 bis 22 mm lang.

Die eiförmigen bis länglichen dreikammerigen Kapselfrüchte sind 4 bis 5,5 cm lang und 1,4 bis 2 cm breit. Die glatten, schwarzen, variabel geformten Samen sind 6 bis 7 mm lang und 4 bis 5 mm breit.

Die Blütezeit reicht von Juni bis Juli.

Systematik und Verbreitung

Agave havardiana ist im Südwesten der Vereinigten Staaten in New Mexico und Texas und in Mexiko in den Bundesstaaten Coahuila und Chihuahua in verschiedenen Bodenformationen an steinigen Hängen, in Gras- und Waldland und in Gebirgsregionen in 1200 bis 2000 m Höhe verbreitet. Sie ist vergesellschaftet mit zahlreichen Sukkulenten- und Kakteenarten.

Die Erstbeschreibung durch William Trelease ist 1912 veröffentlicht worden.[1]

Agave havardiana ist ein Vertreter der Sektion Parryanae. Sie ist innerhalb der Gruppe durch die differenzierte Blatt- und Blütenstruktur charakterisiert.[2] Die Art ist nahe verwandt mit Agave parryi, jedoch sind Unterschiede der Blattstruktur erkennbar. Agave havardiana wird im Ruth Bancroft Garden in Kalifornien kultiviert. Sie kann bei trockenem Stand Frostperioden bis minus 18 °C vertragen.

Literatur

  • August J. Breitung: Agave havardiana. In: The Agaves. The Cactus & Succulent Journal Yearbook, 1968, S. 78.
  • Howard Scott Gentry: Agaves of Continental North America. University of Arizona Press, 1982, S. 522, 527, 531–535.
  • T. Heller: Agaven. Münster 2006. S. 95–96.
  • Mary & Gary Irish: Agaves, yuccas, and related plants. A Gardener's Guide. Timber Press, 2000, ISBN 0-88192-442-3, S. 130–131, Pl. 20.
  • J. Thiede: Agave havardiana. In: Urs Eggli (Hrsg.): Sukkulenten-Lexikon. Einkeimblättrige Pflanzen (Monocotyledonen). Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3662-7, S. 36.

Einzelnachweise

  1. William Trelease In: Rep. (Annual) Missouri Bot. Garden. 1911 (publ. 1912), Band 22, S. 91.
  2. Gentry et al.: 1982 S. 535
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Autoren und Herausgeber von Wikipedia
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wikipedia DE

Agave havardiana: Brief Summary ( German )

provided by wikipedia DE

Agave havardiana ist eine Pflanzenart aus der Gattung der Agaven (Agave). Ein englischer Trivialname ist „Havard’s Century Plant“.

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Autoren und Herausgeber von Wikipedia
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wikipedia DE

Agave havardiana

provided by wikipedia EN

Agave havardiana is a plant species native to the Big Bend area of western Texas as well as Chihuahua and Coahuila. It prefers grassy to rocky slopes or woodlands at elevations of 1200–2000 m.[2]

Agave havardiana is an acaulescent species forming rosettes low to the ground, sometimes creating suckers but not forming large colonies like some other species. Leaves are up to 70 cm (28 inches) long, with teeth along the margins and at the tip. Flowering stalks can be up to 7 m (23 feet) tall, with yellow to yellow-green flowers. Fruits are dry, oblong, up to 6 cm (2.4 inches) long.[3][4]

This species is under threat from habitat loss, mostly for cattle ranching.[1]

References

  1. ^ a b Hernández Sandoval, L.; Sandoval-Gutiérrez, D.; Hernández-Martínez, M.; Sánchez, E.; González-Elizondo, M.; Zamudio, S.; Matías-Palafox, M. (2020). "Agave havardiana". IUCN Red List of Threatened Species. 2020: e.T115629519A116353923. doi:10.2305/IUCN.UK.2020-2.RLTS.T115629519A116353923.en. Retrieved 20 November 2021.
  2. ^ Flora of North America vol 26 p 458.
  3. ^ Trelease, William. Rep. (Annual) Missouri Bot. Gard. 22: 91, plates 84–86. 1912.
  4. ^ Gentry, H. S. 1982. Agaves of Continental North America. Tucson.
license
cc-by-sa-3.0
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Wikipedia authors and editors
original
visit source
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wikipedia EN

Agave havardiana: Brief Summary

provided by wikipedia EN

Agave havardiana is a plant species native to the Big Bend area of western Texas as well as Chihuahua and Coahuila. It prefers grassy to rocky slopes or woodlands at elevations of 1200–2000 m.

Agave havardiana is an acaulescent species forming rosettes low to the ground, sometimes creating suckers but not forming large colonies like some other species. Leaves are up to 70 cm (28 inches) long, with teeth along the margins and at the tip. Flowering stalks can be up to 7 m (23 feet) tall, with yellow to yellow-green flowers. Fruits are dry, oblong, up to 6 cm (2.4 inches) long.

This species is under threat from habitat loss, mostly for cattle ranching.

license
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copyright
Wikipedia authors and editors
original
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wikipedia EN

Agave havardiana ( Vietnamese )

provided by wikipedia VI

Agave havardiana là một loài thực vật có hoa trong họ Măng tây. Loài này được Trel. mô tả khoa học đầu tiên năm 1911.[1]

Hình ảnh

Chú thích

  1. ^ The Plant List (2010). Agave havardiana. Truy cập ngày 16 tháng 7 năm 2013.

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Wikipedia tác giả và biên tập viên
original
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wikipedia VI

Agave havardiana: Brief Summary ( Vietnamese )

provided by wikipedia VI

Agave havardiana là một loài thực vật có hoa trong họ Măng tây. Loài này được Trel. mô tả khoa học đầu tiên năm 1911.

license
cc-by-sa-3.0
copyright
Wikipedia tác giả và biên tập viên
original
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wikipedia VI