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Deschampsia flexuosa

(Crinkled Hair Grass)

Overview

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Interesting Facts

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Common Names

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Common Names in English:

Crinkled Hair Grass, Wavy Hair Grass, Wavy Hairgrass

Description

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Genus Deschampsia

Perennials , densely tufted . Leaf blades mainly basal, linear to setaceous , flat, folded or rolled; ligule membranous. Inflorescence usually an open panicle, infrequently contracted or spikelike; branches and pedicels usually filiform . Spikelets oblong to gaping , shining, laterally compressed , florets 2-3(-5), disarticulating below each floret; rachilla pilose , extended beyond uppermost floret; glumes lanceolate to oblong, subequal , ± equaling spikelet, membranous, shining, keeled , lower glume 1-veined, upper glume 1-3-veined; floret callus small, pubescent to conspicuously bearded ; lemmas lanceolate to oblong, hyaline to shiny cartilaginous , back rounded , finely 4-veined (5th midvein extended into awn ), glabrous , awned from near base or in lower half, apex membranous, broad, 4-toothed or denticulately truncate ; awn straight or weakly geniculate , usually not exserted from spikelet; palea hyaline, subequal to lemma. Ovary glabrous. Caryopsis with solid endosperm.

About 40 species: temperate and cold regions of the world; three species in China.[1]

Physical Description

Species Deschampsia flexuosa

Perennial , tufted , sometimes rhizomatous ; old basal sheaths tightly overlapping. Culms slender, erect , 15-60 cm tall, 2- or 3-noded. Leaf sheaths longer than internodes, smooth or scaberulous upward; leaf blades setaceous , rather stiff, 3-15 cm, 0.3-0.5 mm wide, abaxial (outer) surface smooth; ligule lanceolate, 2-4 mm. Panicle open, ovate in outline, 5-10 cm, silvery with purple or brown tinge; branches usually paired , capillary , flexuous , bearing spikelets on distal part. Spikelets 4-6(-8) mm, florets 2, rachilla internode short; glumes thinly membranous, 1-veined, lower shorter than upper, apex acute; callus hairs ca. 1 mm; lemmas 3.5-5(-6) mm, asperulous , awned from near base , apex denticulate or erose; awn 5-8 mm, exserted from spikelet, geniculate in middle , column dark brown, twisted. Anthers 1.5-2.5 mm. Fl. and fr. Jul-Sep. 2n = 28. [source]

A variant of this widespread species found on Yu Shan (Mt . Morrison) in Taiwan has larger spikelets than usual (6-8 mm), since the glumes are drawn out into long caudate tips , with the upper glume 1-2 mm longer than the lower. This variant is the basis of Deschampsia kawakamii. Typical D. flexuosa also occurs in Taiwan. [source]

Habit: GraminoidGrowth Form: BunchShape and Orientation: Erect

Flowers: Bloom Period: Late SpringFlower Color: Yellow • Flower Conspicuous: No

Seeds: Seed per Pound: 668000 • Seed Spread Rate: Slow • Seedling Vigor: High • Fruit/Seed Abundance: Medium • Fruit/Seed Color: Brown • Fruit/Seed Conspicuous: No • Cold Stratification Required: No

Foliage: Foliage Color: Green • Foliage Porosity Summer: Porous • Foliage Porosity Winter: Porous • Foliage Texture: Fine • Fall Conspicuous: No • Leaf Retention: No

Size/Age/Growth

Active Growth Period: Spring and Summer • Growth Rate: Moderate • After Harvest Regrowth Rate: Slow • Mature Height (feet): 2.6 • Size: 12-18" tall. • Vegetative Spread Rate: None • Lifespan: Lifespan

Habitat

Exposed mountain peaks, on stony soil and rocky slopes [2].

Typically found at an altitude of 0 to 1,919 meters (0 to 6,296 feet).[3]

Biology

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Reproduction

Duration: PerennialCoppice Potential: No • Progagated by Bulbs: No • Propagated by Bare Root: No • Propagated by Container: No • Propagated by Corms: No • Propagated by Cuttings: No • Propagated by Seed: Yes • Propagated by Sod: No • Propagated by Sprigs: No • Propagated by Tubers: No • Fruit/Seed Period Begin: Summer • Fruit/Seed Period End: Summer • Fruit/Seed Persistence: No

Growth

Culture: Space 18-24" apart.

Soil: Adapted to Medium Textured: Adapted to Medium Textured Soils • Adapted to Coarse Textured Soils: Yes • Anaerobic Tolerance: None • Salinity Tolerance: None • CaCO3 Tolerance: Medium • Minimum pH: 4.8 • Maximum pH: 6.8 • Fertility Requirement: Low

Sunlight: Sun Exposure: Sun to Partial Shade. • Shade Tolerance: Tolerant

Moisture: Drought Tolerance: Medium • Minimum Precipitation: 32 • Maximum Precipitation: 55 • Moisture Use: Medium

Temperature: Minimum Temperature (F): -38 • Minimum Frost Free Days: 80 • Cold Hardiness: 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b. (map)

Taxonomy

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Synonyms

A. kawakamii Hayata • Aira flexuosa L. • Aira flexuosa Linnaeus • Arundo flexuosa (L.) Clairv. • Avena flexuosa (L.) Mert. & Koch • Avenella flexuosa (L.) Drejer • Avenella flexuosa (L.) Parl. • Avenella flexuosa (Linnaeus) Drejer • Deschampsia kawakamii (Hayata) Honda • Lerchenfeldia flexuosa (L.) Schur • Lerchenfeldia flexuosa (Linnaeus) Schur. • Podionapus flexuosus (L.) Dulac

Notes

Name Status: Accepted Name .

Last scrutiny: 15-Mar-2000

Similar Species

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Members of the genus Deschampsia

ZipcodeZoo has pages for 23 species, subspecies, varieties, forms, and cultivars in this genus:

D. alpina (Alpine Hair Grass) · D. beringensis (Bering Hair Grass) · D. brevifolia (Bering Hairgrass) · D. caespitosa (Mackenzie Hairgrass) · D. caespitosa caespitosa (Tufted Hair Grass) · D. caespitosa viviparia (Tufted Hair Grass) · D. caespitosa 'Bronzeschleier' (Bronze Veil Tufted Hair Grass) · D. caespitosa 'Goldgehaenge' (Gold Pendant Tufted Hair Grass) · D. caespitosa 'Schottland' (Tufted Hair Grass) · D. caespitosa 'Tautrager' (Tufted Hair Grass) · D. cespitosa alpina (Tufted Hairgrass) · D. cespitosa cespitosa (Tufted Hair Grass) · D. cespitosa parviflora (Tufted Hairgrass) · D. cespitosa subsp. alpina (Alpine Tufted Hairgrass) · D. cespitosa 'Northern Lights' (Tufted Hairgrass) · D. congestiformis (Montana Hairgrass) · D. danthonioides (Annual Hair Grass) · D. elongata (Slender Hair Grass) · D. flexuosa (Crinkled Hair Grass) · D. flexuosa var. flexuosa (Wavy Hairgrass) · D. flexuosa var. montana (Montana Wavy Hairgrass) · D. holciformis (Pacific Hair Grass) · D. nubigena (Alpine Hairgrass)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 15, 2007:

Identifiers

Footnotes

  1. Zhen-lan Wu & Sylvia M. Phillips "Deschampsia". in Flora of China Vol. 22 Page 316, 332. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. "Deschampsia flexuosa". in Flora of China Vol. 22 Page 332. Missouri Botanical Garden Press. Online at EFloras.org. [back]
  3. Mean = 225.830 meters (740.912 feet), Standard Deviation = 237.610 based on 19,190 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 2012-05-01