Agoseris grandiflora

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Agoseris grandiflora (Nutt.) Greene

Asteraceae

Life form: perennial

Exposure: sun   4

Arrangement: rosette
Leaves: decidious

Shape: oblanceolate

Division: simple

Shape: many-stellate
Fruit: achene

3A / f8da21 

Inflorescence: not specified

Petals: not specified
Habit: not specified

Growth form: erect

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Rosopsida
Subclassis:
Asteridae
Superordo:
Asteranae
Ordo:
Asterales

Agoseris grandiflora is a perennial.

Naming

Agoseris grandiflora was described by Carl Ernst Otto Kuntze in 1891. The name is considered as validly published.

Taxonomy

Agoseris grandiflora is a species in the genus Agoseris which contains approximately 16 to 42 species and belongs to the family of the Asteraceae (Aster Family). The type species of the genus is Agoseris glauca.

Characteristics

Growth

The perennials reach heights of to 100 centimetres, the main growing season is in spring. They have a prostrate habit and are comparatively short-lived.

Leaves

Agoseris grandiflora is deciduous. The dark-green, simple leaves are in rosettes. They are oblanceolate with ciliate margins. The foliage is porous.

Flowers and Fruits

Agoseris grandiflora produces showy yellow many-stellate flowers from March to May.

The perennials produce brown achenes in summer.

Root System

Distribution

Agoseris grandiflora is native to California, Idaho, Montana, Nevada, Oregon, Utah and Washington.

Cultivation

The perennials prefer a sunny situation. They prefer soil with a pH between 5,8 and 7,3 and need a soil depth of at least 20 centimetres for good growth. They tolerate temperatures down to -35°C (USDA zone 4) and need a frost-free period of at least 17 weeks.

Tolerance of special soil conditions

  • none: soil salinity
  • low: anaerobic soil
  • medium: drought, calcareous soil

Uses

Maintenance and Propagation

Propagate by sowing.

Cultivars

Pests and Diseases

Literature

  • Walter Erhardt, Erich Götz, Nils Bödeker, Siegmund Seybold: Der große Zander. Eugen Ulmer KG, Stuttgart 2008, ISBN 978-3-8001-5406-7. (Ger.)
  • Christoper Brickell (Editor-in-chief): RHS A-Z Encyclopedia of Garden Plants. Third edition. Dorling Kindersley, London 2003, ISBN 0-7513-3738-2.

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