Hosta nigrescens

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Hosta nigrescens (Makino) F.Maek.

Hostaceae

Life form: perennial
Usage: ornamental plant

Exposure: half shade - Exposure: shade   7

Moisture: moist

Soil: sandy loam - Soil: sandy clay

Arrangement: basal
Leaves: decidious

Shape: ovate

Division: simple

Shape: funnel-shaped
Fruit: loculicidal capsule

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Inflorescence: raceme

Petals: not specified
Habit: not specified

Growth form: not specified

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Liliopsida
Subclassis:
Liliidae
Superordo:
Lilianae
Ordo:
Amaryllidales

Hosta nigrescens is a perennial.

Naming

Hosta nigrescens was already described and the name validly published by Tomitarô Makino. It was Fumio Maekawa, however, who reclassified it into todays valid botanical systematics .

Taxonomy

Hosta nigrescens is a species in the genus Hosta which contains approximately 30 to 52 species and belongs to the family of the Hostaceae (Plantain-lily Family).

Characteristics

Growth

The perennials reach heights of 60 to 70 centimetres.

Leaves

Hosta nigrescens is deciduous. The mid-green, simple leaves are basal. They are ovate, entire and petiolate.

Flowers and Fruits

Hosta nigrescens produces racemes of white funnel-shaped flowers in August.

The perennials produce loculicidal capsules.

Root System

Distribution

Hosta nigrescens is native to Japan.

Cultivation

The perennials prefer a half-shady to shady situation on moist soil. The substrate should be sandy-loamy or sandy clay and comparatively rich. They tolerate temperatures down to -18°C (USDA zone 7). The plants prefer a sheltered position.

Classification after Prof. Dr. Sieber

  • banks
  • woods (soil usually rich in organic material)

Uses

Suited for perennial borders and for mixed borders.

Maintenance and Propagation

  • For healthy growth mulch in spring.

Propagate by sowing seed in a cold frame in spring or by division in early spring or in late summer.

Cultivars

Pests and Diseases

Gnaw marks and slime trails indicate a problem with slugs. Prevent infestation by improving hygiene and by regularly working the soil. In case of an infestation use slug pellets or nematodes to control pest. Handpicking the slug also helps, do this preferably in the evening hours.

Small dark-coloured beetles feeding on the plants are very likely vine weevils. Their larvae feed on seedling, cuttings, roots and tubers. Handpick and destroy pests and improve hygiene. Additionaly use insecticide or biological control (nematodes).

Disfigured and discoloured leaves and flowers indicate a viral infection. Remove affected plants and control insects that may spread the disease.

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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