Apocynum cannabinum

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Apocynum cannabinum L.

Apocynaceae

Life form: perennial

Exposure: half shade   4

Moisture: moist

Arrangement: opposite
Leaves: decidious

Shape: lanceolate

Division: simple

Shape: tubular
Fruit: follicle

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Inflorescence: cymose corymb

Petals: not specified
Habit: not specified

Growth form: erect

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Rosopsida
Subclassis:
Lamiidae
Superordo:
Gentiananae
Ordo:
Gentianales

Apocynum cannabinum, commonly known as American hemp, is a perennial.

Naming

Apocynum cannabinum was described by Carl Linnaeus in 1753. The name is considered as validly published.

Taxonomy

Apocynum cannabinum is a species in the genus Apocynum which contains approximately 16 to 45 species and belongs to the family of the Apocynaceae (Dogbane Family).

Characteristics

Growth

The perennials reach heights of 1 to 1,2 metres, the main growing season is in spring and summer. They have a erect habit.

Leaves

Apocynum cannabinum is deciduous. The dark-green, simple leaves are opposite. They are lanceolate, entire and petiolate. The foliage is porous.

Flowers and Fruits

Apocynum cannabinum produces cymose corymbs of white tubular flowers from June to September.

The perennials produce an abundance of white follicles from summer to autumn.

Root System

The plants form tap roots.

Distribution

Apocynum cannabinum is native to eastern North America.

Cultivation

The perennials prefer a half-shady situation on moist soil. They prefer soil with a pH between 4,5 and 7 and need a soil depth of at least 30 centimetres for good growth. They tolerate temperatures down to -35°C (USDA zone 4) and need a frost-free period of at least 14 weeks.

Tolerance of special soil conditions

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

Uses

The recommended planting distance is 60 to 110 centimetres.

Maintenance and Propagation

The plants usually require only a moderate amount of maintenance.

Propagate by sowing.

Cultivars

Poisonousness

Apocynum cannabinum is highly toxic.

Aeskulap  Please read the health issues note

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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