Difference between revisions of "Dichanthelium acuminatum"

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* Common Names: hairy perennial panicgrass
 
* Common Names: hairy perennial panicgrass
 
* Codon: DICACU
 
* Codon: DICACU
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----
 
[[File:DIAC RodGilbert flw good.jpg |thumb|Photo by Rod Gilbert. Also featured on Main Page.]]
 
[[File:DIAC RodGilbert flw good.jpg |thumb|Photo by Rod Gilbert. Also featured on Main Page.]]
 
===Taxonomy===
 
===Taxonomy===
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===Description===
 
===Description===
  
Tufted perennial; stems yellowish-green, leafy towards base, spreading, usually velvety-hairy, 15-40 cm tall. Leaves flat, firm, erect to ascending, hairy, 5-10 mm wide, no auricles; ligules 3-4 mm long, consisting of long hairs.
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Tufted perennial grass with broad, open panicles, finely-haired,<ref>Bowcutt, F., & Hamman, S. (2016). ''Vascular Plants of the South Sound Prairies''. p. 128.</ref> growing to 40 cm tall.<ref name=":1">(Pojar and MacKinnon, 1994)</ref> Culms hollow, simple in spring, branched by fall.<ref name=":0" /> Sheaths open, ligules 3-4 mm long, consisting of straight hairs.<ref name=":0" /> Leaf blades flat, erect to ascending,<ref name=":1" /> broadly lanceolate, to 12 cm wide,<ref name=":2">Bowcutt, F., & Hamman, S. (2016). ''Vascular Plants of the South Sound Prairies''. p. 128.</ref> 5-12 mm broad.<ref name=":0" /> Terminal, chasmogamous panicles flower in spring and late fall, side branch panicles cleistogamous, flowering in summer.<ref name=":3">Hitchcock, C. L., Cronquist, A., Giblin, D.,
 
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& Legler, B. et al. (2018). ''Flora of the Pacific Northwest: an
Inflorescence a panicle, open, 3-9 cm long; spikelets up to 2 mm long, short-hairy, two flowered, the lower flower sterile; glumes unequal in size; fertile lemmas hardened <ref>(Pojar and MacKinnon, 1994)</ref>
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illustrated manual''. Seattle: University of Washington Press. p. 789.</ref> Spikelets with 2 florets, 2 mm long,<ref name=":2" /> the first usually an empty lemma.<ref name=":3" /> Articulation point below the glumes; first glume much smaller than second,<ref name=":3" /> 1-nerved, 0.5 mm long;<ref name=":0" /> second glume equal to sterile lemma,<ref name=":3" /> 7-9 nerved, enclosing fertile floret;<ref name=":0" /> second lemma hard, faintly nerved. Fruits are utricles.<ref name=":0" />
  
 
===Bloom Period===
 
===Bloom Period===
  
June-September
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June-September<ref name=":0" />
  
Dichantheliums are characterized by two distinct blooming periods. The conspicuous primary flowering heads are terminal to the culms and are produced in late spring and early summer. Secondary flowering heads are produced from the leaf axils begininning in mid-summer and continuing into early autumn. The primary flowering heads usually have a lower seedset than the secondary ones, which have flowers that remain closed and are self pollinated. However, seeds produced by the primary flowers appear to germinate more readily than seeds from the secondary flowers.  
+
Dichantheliums are characterized by two distinct blooming periods. The conspicuous primary flowering heads are terminal to the culms and are produced in late spring and early summer. Secondary flowering heads are produced from the leaf axils begininning in mid-summer and continuing into early autumn. The primary flowering heads usually have a lower seedset than the secondary ones, which have flowers that remain closed and are self pollinated. However, seeds produced by the primary flowers appear to germinate more readily than seeds from the secondary flowers.<ref>(nativeplantnetwork.org)</ref>  
 
+
<ref>(nativeplantnetwork.org)</ref>
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===Distribution===
 
===Distribution===
Southern British Columbia south along the coast to California; east of the Cascades mainly along water courses or around springs in the mountains, east to Montana and Wyoming.
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Coastal British Columbia to California; east of the Cascades mostly along waterways and springs, east to the Rocky Mountains.<ref name=":0">WTU Herbarium, Burke Museum, & University of Washington. Retrieved from http://biology.burke.washington.edu/herbarium/imagecollection/taxon.php?Taxon=Dichanthelium%20acuminatum</ref>
  
 
[[Image:DIAC RodGilbert veg good.jpg|300px|thumb|right|''Dichanthelium acuminatum'' vegetation. Image by Rod Gilbert.]]
 
[[Image:DIAC RodGilbert veg good.jpg|300px|thumb|right|''Dichanthelium acuminatum'' vegetation. Image by Rod Gilbert.]]
  
 
===Habitat===
 
===Habitat===
Rocky or sandy river banks or lake margins to open woods, marshy areas or dry prairies, from sea level to high elevation in the mountains. Moist, sandy ground (lakeshores, beaches, stream banks), rocky and gravelly areas in bogs, meadows and open forests at low to mid elevations <ref>(Pojar and MacKinnon, 1994).</ref>
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Low to high elevation dry prairies, open woods, sandy to rocky stream and lake shores, wetlands.<ref name=":0" />
  
 
===Uses===
 
===Uses===
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Hardening Phase 1 – 2 weeks.
 
Hardening Phase 1 – 2 weeks.
 
 
<ref>(nativeplantnetwork.org)</ref>
 
<ref>(nativeplantnetwork.org)</ref>
  
 
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[https://npn.rngr.net/npn/propagation/protocols/poaceae-dichanthelium-3854/?searchterm=Dichanthelium%20acuminatum Native
 +
Plant Network Propagation Protocol]
 
===Seed===
 
===Seed===
 
[[File:Dichanthelium acuminatum.jpg|300px|thumb|''Dichanthelium acuminatum,'' photo by Lisa Hintz]]
 
[[File:Dichanthelium acuminatum.jpg|300px|thumb|''Dichanthelium acuminatum,'' photo by Lisa Hintz]]
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'''Latitudinal Cross Section:''' elliptical [[File:DIAC lat.png|30px|]] <br />
 
'''Latitudinal Cross Section:''' elliptical [[File:DIAC lat.png|30px|]] <br />
 
'''Longitudinal Cross Section:''' elliptical [[File:DIAC long.png|30px|]]
 
'''Longitudinal Cross Section:''' elliptical [[File:DIAC long.png|30px|]]
===Image Gallery===
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===Photo Gallery===
 
<gallery>
 
<gallery>
 
File:DIAC_RodGilbert_veg_good.jpg|Photo:Rod Gilbert
 
File:DIAC_RodGilbert_veg_good.jpg|Photo:Rod Gilbert

Latest revision as of 18:30, 28 June 2021

  • Scientific Name: Dichanthelium acuminatum
  • Family: Poaceae
  • Common Names: hairy perennial panicgrass
  • Codon: DICACU

Photo by Rod Gilbert. Also featured on Main Page.

Taxonomy

Scientific classification
Kingdom: Plantae
Subkingdom: Viridiplantae
Phylum: Tracheophyta
Subphylum: Spermatophytina
Class: Magnoliopsida
Subclass: Lilianae
Order: Poales
Family: Poaceae
Genus: Dichanthelium (Hitchc. & Chase) Gould
Species: Dichanthelium acuminatum (Sw.) Gould & C.A. Clark
Synonyms
  • Panicum acuminatum Sw.
  • Panicum acuminatum var. acuminatum Sw.

[1]

Description

Tufted perennial grass with broad, open panicles, finely-haired,[2] growing to 40 cm tall.[3] Culms hollow, simple in spring, branched by fall.[4] Sheaths open, ligules 3-4 mm long, consisting of straight hairs.[4] Leaf blades flat, erect to ascending,[3] broadly lanceolate, to 12 cm wide,[5] 5-12 mm broad.[4] Terminal, chasmogamous panicles flower in spring and late fall, side branch panicles cleistogamous, flowering in summer.[6] Spikelets with 2 florets, 2 mm long,[5] the first usually an empty lemma.[6] Articulation point below the glumes; first glume much smaller than second,[6] 1-nerved, 0.5 mm long;[4] second glume equal to sterile lemma,[6] 7-9 nerved, enclosing fertile floret;[4] second lemma hard, faintly nerved. Fruits are utricles.[4]

Bloom Period

June-September[4]

Dichantheliums are characterized by two distinct blooming periods. The conspicuous primary flowering heads are terminal to the culms and are produced in late spring and early summer. Secondary flowering heads are produced from the leaf axils begininning in mid-summer and continuing into early autumn. The primary flowering heads usually have a lower seedset than the secondary ones, which have flowers that remain closed and are self pollinated. However, seeds produced by the primary flowers appear to germinate more readily than seeds from the secondary flowers.[7]

Distribution

Coastal British Columbia to California; east of the Cascades mostly along waterways and springs, east to the Rocky Mountains.[4]

Dichanthelium acuminatum vegetation. Image by Rod Gilbert.

Habitat

Low to high elevation dry prairies, open woods, sandy to rocky stream and lake shores, wetlands.[4]

Uses

Landscaping: Panic grass is good for a low-traffic ground cover. Useful ground cover in controlled moist area. Attractive fall/winter color. Excellent in poorly-drained locations [8]

Propagation

Seed germinates readily with day temperatures of 20º C and night temperatures of 5-10º C Do not cover seeds; simply lightly press into the soil. Requires continuous moisture for germination. Good results will fall sowing - 90% germination by mid-April [9]

Conditioned seed is planted into round cell greenhouse flat liners with 38 cells per flat that have been filled with coarse processed bark and composted pine bark growing medium. Seed is surface sown at a rate of 3-5 seeds per cell and lightly covered with starter sized, 1/16" - 1/8" diameter, granite poultry grit to combat damping off diseases. Prepared flats are lightly hand watered to slightly moisten the growing medium.

Stratified seed is placed in a greenhouse maintained under natural lighting and at a minimum temperature of 70 degrees Fahrenheit. Soil moisture is maintained during germination by an automatic overhead watering system set to cycle for 20 seconds every thirty minutes during daylight hours. Germination typically occurs 7 - 10 days after placement in the greenhouse. After germination, seedlings are maintained in a greenhouse environment 2-4 months to promote development of a plug with at least 6 inches of top growth and a dense, fibrous root system suitable for mechanical transplanting. Watering is reduced to overhead hand watering once daily. Seedlings receive a water soluble complete fertilizer bi-weekly until hardening.

Hardening Phase 1 – 2 weeks. [10]

[https://npn.rngr.net/npn/propagation/protocols/poaceae-dichanthelium-3854/?searchterm=Dichanthelium%20acuminatum Native Plant Network Propagation Protocol]

Seed

Dichanthelium acuminatum, photo by Lisa Hintz

Seed sample from: 2011

Average Measurement: 1.6 x 1 x 0.8

Measurement Range: L: 1.5 x 1.9, W: no variation in sample set (all seeds measured 1 mm) D: 0.7 - 0.9

Features

Shape: One side of seed has two grooves running from hilium to opposite apex that form a football shaped opening.

Color: Seeds in green and purple husk that is coarsely hairy. Inner seed is off-white with a white, slightly puckered hilium.

Surface: Seeds are glossy and smooth. Some are very finely striped longitudinally.

Latitudinal Cross Section: elliptical DIAC lat.png
Longitudinal Cross Section: elliptical DIAC long.png

Photo Gallery

References

  1. Integrated Taxonomic Information System. Retrieved from https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=41646
  2. Bowcutt, F., & Hamman, S. (2016). Vascular Plants of the South Sound Prairies. p. 128.
  3. 3.0 3.1 (Pojar and MacKinnon, 1994)
  4. 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 WTU Herbarium, Burke Museum, & University of Washington. Retrieved from http://biology.burke.washington.edu/herbarium/imagecollection/taxon.php?Taxon=Dichanthelium%20acuminatum
  5. 5.0 5.1 Bowcutt, F., & Hamman, S. (2016). Vascular Plants of the South Sound Prairies. p. 128.
  6. 6.0 6.1 6.2 6.3 Hitchcock, C. L., Cronquist, A., Giblin, D., & Legler, B. et al. (2018). Flora of the Pacific Northwest: an illustrated manual. Seattle: University of Washington Press. p. 789.
  7. (nativeplantnetwork.org)
  8. (S. Bastin, pers. comm.).
  9. (S. Bastin, pers. comm.).
  10. (nativeplantnetwork.org)


Robert H. Mohlenbrock @ USDA-NRCS PLANTS Database / USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln.