Agave havardiana

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Agave havardiana
Flickr - ggallice - Havard's century plant.jpg

Agave havardiana

Systematics
Order : Asparagales (Asparagales)
Family : Asparagaceae (Asparagaceae)
Subfamily : Agave family (Agavoideae)
Genre : Agaves ( agave )
Subgenus : agave
Type : Agave havardiana
Scientific name
Agave havardiana
Trel.

Agave havardiana is a species ofthe agave genus ( agave ). An English common name is "Havard's Century Plant".

description

Agave havardiana forms open rosettes with sparse runners. The stature height ranges from 40 to 60 cm with a diameter of 50 to 80 cm. The lanceolate, variably arranged, light yellow-green to bluish, pointed leaves are 30 to 60 cm long and 15 to 20 cm wide. It forms clear imprints of the bud. The leaf margins are strongly serrated and form a variable horny edge. The strong, dark brown to gray terminal spine is 3 to 10 cm long.

The panicle inflorescence becomes 2 to 4 m high. The light green to yellow flowers are 68 to 88 mm long and appear from the middle to the tip of the inflorescence on variably arranged branches. The deep, funnel-shaped flower tube is 14 to 22 mm long.

The egg-shaped to elongated three-chamber capsule fruits are 4 to 5.5 cm long and 1.4 to 2 cm wide. The smooth, black, variably shaped seeds are 6 to 7 mm long and 4 to 5 mm wide.

The flowering period extends from June to July.

Systematics and distribution

Agave havardiana is found in the southwestern United States in New Mexico and Texas and in Mexico in the states of Coahuila and Chihuahua in various soil formations on stony slopes, in grass and woodland and in mountainous regions at 1200 to 2000 m altitude. It is associated with numerous types of succulents and cacti.

The first description by William Trelease was published in 1912.

Agave havardiana is a representative of the Parryanae section . It is characterized within the group by the differentiated leaf and flower structure. The species is closely related to Agave parryi , but there are differences in leaf structure. Agave havardiana is grown at Ruth Bancroft Garden in California. It can withstand periods of frost down to minus 18 ° C when it is dry.

literature

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

Individual evidence

  1. ↑ William Trelease In: Rep. (Annual) Missouri Bot. Garden. 1911 (publ. 1912), volume 22, p. 91.
  2. ^ Gentry et al .: 1982 p. 535

Web links

Commons : Agave havardiana  - collection of images, videos and audio files