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Comments ( anglais )

fourni par eFloras
Agave phillipsiana is known from only four sites within Grand Canyon National Park. All are found on terraces along permanent waterways. Three of the sites are near pre-Columbian agricultural features or habitation sites. Two sites occur near a Kayenta-Anasazi Pueblo cliff dwelling (A.D. 1000–1150), on a terrace presumably once farmed by the early inhabitants. Agave phillipsiana possesses traits that would be advantageous to those harvesting it for food, since it is a plant that freely offsets and has open rosettes with large, long leaves that are easily cut. The species is possibly an ancient cultivar selected by pre-Columbian people from populations related to A. palmeri, A. colorata Gentry, or other closely related taxa.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
citation bibliographique
Flora of North America Vol. 26: 443, 446, 461 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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Description ( anglais )

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Plants acaulescent, freely suckering; rosettes solitary to cespitose, 7.5–10 × 7.5–10 dm, open. Leaves erect, 76–78 × 10–11 cm; blade glaucous-green to dark green, lightly cross-zoned, lanceolate, rigid, adaxially concave toward apex, abaxially convex at base; margins straight or undulate, armed, teeth single, well defined, brittle, 4–7 mm, 1–2.5 cm apart, interstitial teeth (2–)3–7, mostly along distal 2/3 of margins; apex not conspicuously incurved, spine brownish gray, slender, 2.5–4 cm. Scape 2.7–5.5 m. Inflorescences narrowly paniculate, not bulbiferous, open; bracts persistent, triangular, 1–2+ cm; lateral branches 9–16, ascending to nearly perpendicular, comprising distal 1/3–1/2 of inflorescence, longer than 10 cm. Flowers 32–45 per cluster, erect, 7.4–8.6 cm; perianth greenish cream, tube campanulate, 15.5–20 × 15–23 mm, limb lobes persistent and often leathery during and after anthesis, spreading, unequal, 15–22 mm, apex often flushed with maroon; stamens long-exserted; filaments inserted subequally below rim of perianth tube, erect, yellow, 4.8–6.4 cm, apex flushed with maroon; anthers yellow, 17–25 mm; ovary 3.3–4.6 cm, neck slightly constricted, 4–8 mm. Capsules not seen. Seeds unknown. 2n = ca. 120.
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cc-by-nc-sa-3.0
droit d’auteur
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
citation bibliographique
Flora of North America Vol. 26: 443, 446, 461 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
rédacteur
Flora of North America Editorial Committee
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eFloras.org
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eFloras

Distribution ( anglais )

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Ariz.
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cc-by-nc-sa-3.0
droit d’auteur
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
citation bibliographique
Flora of North America Vol. 26: 443, 446, 461 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
rédacteur
Flora of North America Editorial Committee
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eFloras.org
original
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eFloras

Flowering/Fruiting ( anglais )

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Flowering early summer.
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cc-by-nc-sa-3.0
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
citation bibliographique
Flora of North America Vol. 26: 443, 446, 461 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
rédacteur
Flora of North America Editorial Committee
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eFloras.org
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eFloras

Habitat ( anglais )

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Sandy to gravelly places with desert scrub; 700--1100m.
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cc-by-nc-sa-3.0
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
citation bibliographique
Flora of North America Vol. 26: 443, 446, 461 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
rédacteur
Flora of North America Editorial Committee
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eFloras.org
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eFloras

Agave phillipsiana ( allemand )

fourni par wikipedia DE

Agave phillipsiana ist eine Pflanzenart aus der Gattung der Agaven (Agave). Ein englischer Trivialname ist „Grand Canyon Agave“.

Beschreibung

Agave phillipsiana formt große, offene Rosetten mit einer Wuchshöhe von 75 bis 100 cm und einem Durchmesser von 75 bis 100 cm. Sie bildet reichlich rhizomatöse Ableger. Die lanzettförmigen, variabel angeordneten, grünen bis bläulichen Blätter sind 76 bis 78 cm lang und 10 bis 11 cm breit. Die braunen bis grauen Blattränder sind unregelmäßig gezahnt. Der braune bis graue Enddorn ist 2,5 bis 4 cm lang.

Der rispige Blütenstand wird 4 bis 5,5 m hoch. Die grünen bis cremefarbenen Blüten sind 32 bis 45 mm lang und erscheinen am oberen Teil des Blütenstandes an unregelmäßig angeordneten, lockeren Verzweigungen. Die Blütenröhre ist 15 bis 20 mm lang.

Die Blütezeit reicht von August bis September.

Systematik und Verbreitung

Agave phillipsiana wächst endemisch in Arizona im inneren Grand Canyon an steinigen offenen Hängen, in offenem Waldland in 700 bis 1150 m Höhe. Sie ist im Tapeals Creek in 1090 m Höhe mit Sclerocactus parviflorus subsp. havasupaiensis, Opuntia engelmannii und Yucca baccata vergesellschaftet.

Die Erstbeschreibung durch Wendy C. Hodgson ist 2001 veröffentlicht worden.[1]

Agave phillipsiana ist ein Vertreter der Sektion Ditepalae. Sie ist extrem selten und nur einige kleine Kolonien wachsen in einem geografisch isolierten Gebiet im inneren Grand Canyon in Arizona. Die Art bildet große offene Rosetten mit zahlreichen rhizomatösen Ablegern. Sie ist mit Agave delamateri und Agave palmeri verwandt, es sind aber Unterschiede in Größe, Form, Blatt- und Blütenstruktur erkennbar. Die im Osten des inneren Grand Canyon vorkommende Agave utahensis subsp. kaibabensis besiedelt kältere Regionen und ist insgesamt kleiner.

Agave phillipsiana wird im Desert Botanic Garden in Tucson, Arizona, kultiviert.

Literatur

  • W. C. Hodgson: A new flora for Arizona in preparation. Agavaceae. Agave. Part I. Agave L. Century Plant. Maguey. In: J. Arizona-Nevada. Acad. Sci. Band 32, Nr. 1, 1999, S. 1–21.
  • James L. Reveal, Wendy C. Hodgson: Flora of North America Agavaceae. Oxford University Press, 2002, S. 461.

Einzelnachweise

  1. Wendy C. Hodgson: Taxonomic Novelties in American Agave (Agavaceae). In: Novon. Band 11, Nummer 4, 2001, S. 410–416 (JSTOR).
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Agave phillipsiana: Brief Summary ( allemand )

fourni par wikipedia DE

Agave phillipsiana ist eine Pflanzenart aus der Gattung der Agaven (Agave). Ein englischer Trivialname ist „Grand Canyon Agave“.

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Agave phillipsiana ( anglais )

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Agave phillipsiana is a rare species of flowering plant in the asparagus family known by the common names Grand Canyon century plant and Phillips agave. It is endemic to Arizona in the United States, where it lives only in Grand Canyon National Park.[1][2] It is a perennial herb or shrub.[3]

This plant forms one or more rosettes of large lance-shaped green to gray-green leaves with teeth along the edges and spines at the tips. The leaf blades grow up to 78 centimeters long by 11 wide. The flowering stalk grows up to 5.5 meters tall. The branching inflorescence has clusters of many flowers each 7 or 8 centimeters wide or more which are greenish and cream-colored with hints of maroon. Long stamens protrude from the flower corollas.[1]

There are four occurrences of this plant, all within Grand Canyon National Park, where they grow on terraces next to rivers. Some occurrences are in locations inhabited by indigenous peoples long ago, who may have farmed the plant and selected it for its ease of propagation and harvest.[1]

The plant's numbers are low but it grows in rugged terrain in a national park, which may protect it somewhat from human threats.[4] It grows in sandy, gravelly, rocky soils in desert scrub, slopes, and hillsides.[5]

References

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cc-by-sa-3.0
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Wikipedia authors and editors
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wikipedia EN

Agave phillipsiana: Brief Summary ( anglais )

fourni par wikipedia EN

Agave phillipsiana is a rare species of flowering plant in the asparagus family known by the common names Grand Canyon century plant and Phillips agave. It is endemic to Arizona in the United States, where it lives only in Grand Canyon National Park. It is a perennial herb or shrub.

This plant forms one or more rosettes of large lance-shaped green to gray-green leaves with teeth along the edges and spines at the tips. The leaf blades grow up to 78 centimeters long by 11 wide. The flowering stalk grows up to 5.5 meters tall. The branching inflorescence has clusters of many flowers each 7 or 8 centimeters wide or more which are greenish and cream-colored with hints of maroon. Long stamens protrude from the flower corollas.

There are four occurrences of this plant, all within Grand Canyon National Park, where they grow on terraces next to rivers. Some occurrences are in locations inhabited by indigenous peoples long ago, who may have farmed the plant and selected it for its ease of propagation and harvest.

The plant's numbers are low but it grows in rugged terrain in a national park, which may protect it somewhat from human threats. It grows in sandy, gravelly, rocky soils in desert scrub, slopes, and hillsides.

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Wikipedia authors and editors
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wikipedia EN

Agave phillipsiana ( vietnamien )

fourni par wikipedia VI

Agave phillipsiana là một loài thực vật có hoa trong họ Măng tây. Loài này được W.C.Hodgs. mô tả khoa học đầu tiên năm 2001.[1]

Chú thích

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

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Hình tượng sơ khai Bài viết liên quan phân họ Thùa này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn.
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Agave phillipsiana: Brief Summary ( vietnamien )

fourni par wikipedia VI

Agave phillipsiana là một loài thực vật có hoa trong họ Măng tây. Loài này được W.C.Hodgs. mô tả khoa học đầu tiên năm 2001.

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Wikipedia tác giả và biên tập viên
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wikipedia VI