Difference between revisions of "Arabis eschscholtziana"

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* Scientific Name: ''Arabis'' ''eschscholtziana''
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* Family: Brassicaceae
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* Common Names: hairy rockcress, Pacific coast rockcress
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* Synonyms/Misapplications: ''Arabis'' ''hirsuta'' var. ''eschscholtziana, Arabis hirsuta'' var. ''glabrata''
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* Codon: ARAHIR
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----
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[[File:ARHI RodGilbert flw good.jpg |thumb|Photo by Rod Gilbert. Also featured on Main Page]]
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=== Taxonomy ===
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{{Taxobox
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| image =
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| image_caption = Photo by Rod Gilbert. Also featured on Main Page
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| name =
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| regnum = [[Plant]]ae
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| subregnum = Virviriplantae
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| phylum = Tracheophyta
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| subphylum= Spermatophytina
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| classis = Magnoliopsida
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| subclassis = Rosanae
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| ordo = Brassicales
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| familia = Brassicaceae
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| genus = ''Arabis'' L.
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| species = '''''Arabis escholtziana''''' Andrz.
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| subspecies =
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| synonyms = *''Arabis hirsuta ssp. eschscholtziana'' (Andrz.) Hultén
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*''Arabis hirsuta'' var. ''glabrata'' Torr. & A. Gray
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*''Arabis hirsuta'' var. ''eschscholtziana'' (Andrz.) Rollins
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}}
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<ref>Integrated Taxonomic Information System. Retrieved from https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=508988</ref>
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=== Description ===
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General: Biennial from a simple crown and strong taproot, the 1-several simple stems 1.5-10 dm. tall, pubescent at the base with stiff, simple hairs, becoming glabrous above.<ref name=":0">WTU Herbarium, Burke Museum, & University of Washington. Retrieved from <nowiki/>http://biology.burke.washington.edu/herbarium/imagecollection/taxon.php?Taxon=Arabis%20eschscholtziana</ref>
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Leaves: Leaves mainly cauline, the basal oblanceolate, 2-8 cm. long, narrowed to short, winged petioles, mostly glabrous on the upper surface, the lower surface purplish, pubescent with stiff, simple hairs; cauline leaves alternate, 5-15, remote to overlapping, sessile and auriculate, ovate-lanceolate to narrowly lance-elliptic, 2-12 cm. long and up to 3 cm. broad, pubescent as the basal leaves or the upper glabrous.<ref name=":0" />
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Flowers: Inflorescence of many-flowered, simple to compound racemes; pedicels 6-9 mm. long; sepals 4, 3-5 mm. long, glabrous, the outer 2 gibbous-based; petals 4, white to cream or pinkish, 4-9 mm. long; stamens 6; style 0.5-1 mm. long.
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Fruit: Siliques glabrous, 3-8 cm. long and 1-2 mm. broad, 1-nerved, strictly erect; seeds in 1 series, 1.5-2 mm. long, wingless or with a wing up to 0.3 mm. broad.<ref name=":0" />
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=== Bloom Period ===
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April to July<ref name=":0" />
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=== Distribution ===
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Covering much of North America, in Washington more common east of the Cascade crest.<ref name=":0" />
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=== Habitat ===
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Moist to dry, usually calcareous, open situations:  open woods, stream banks, ledges, cliffs, bluffs, and floodplains. It occurs frequently in disturbed habitats. Dunes and dry banks, rocky/chalk, limestone slopes and gravelly native prairie. Plants seem to be more abundant where grazing is light.<ref>University of Washington. Retrieved from https://depts.washington.edu/propplnt/Plants/Arabis.htm.</ref>
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=== Uses ===
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=== Propagation ===
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Sow the seed as soon as it is ripe in a light position in a cold frame. Seed can also be sown in spring. When large enough to handle, prick the seedlings out into individual pots and plant them out in the summer. Conduct divisions after flowering, usually in the spring. The divisions can be planted into their permanent plots if required. <ref>Rice, G. (1988). ''A Wide Range of Perennial Plants that can be Grown in Britian and How to Grow Them''. Volume 2. Thompson and Morgan.</ref>
  
 
===Seed===
 
===Seed===
'''Abbreviation:''' ARHI
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[[File:Arabis hirsuta.jpg|300px|thumb|''Arabis hirsuta,'' photo: Lisa Hintz]]
  
 
'''Seed sample from:''' 2011
 
'''Seed sample from:''' 2011
  
'''Measurement:''' 1.6 x 0.9 x 0.2
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'''Average Measurement:''' 1.6 x 0.9 x 0.2
  
'''Features:''' Seeds flat, somewhat winged, especially at hilium end and opposite. Accumbent cotyledons and sulcus present. Seed dark brown in center, darkening to black at the winged edges. Hilium inconspicuous.  
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'''Measurement Range:''' L: 1.3 - 1.75, W: 0.6 - 1, D: 0.1 - 0.3
  
Texture is bumpy, and seed is somewhat lustrous.  
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====Features====
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'''Shape:''' Seeds flat, somewhat winged, especially at hilum end and opposite. Accumbent cotyledons and sulcus present.
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'''Color:''' Seed dark brown in center, darkening to black at the winged edges. Hilum inconspicuous.
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'''Surface:''' Texture is bumpy, and seed is somewhat lustrous.  
  
 
'''Latitudinal Cross Section:''' elliptical [[File:ARHI-lat-crosssection.png]]
 
'''Latitudinal Cross Section:''' elliptical [[File:ARHI-lat-crosssection.png]]
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'''Longitudinal Cross Section:''' elliptical [[File:ARHI-long-crosssection.png]]
 
'''Longitudinal Cross Section:''' elliptical [[File:ARHI-long-crosssection.png]]
  
[[File:Arabis hirsuta.jpg]
 
  
  
 
{{Basics}}
 
{{Basics}}
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=== Photo Gallery ===
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<gallery>
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File:ARHI RodGilbert veg good.jpg|Photo: Rod Gilbert, 2005
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</gallery>
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=== References ===
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<references />

Latest revision as of 22:48, 20 March 2021

  • Scientific Name: Arabis eschscholtziana
  • Family: Brassicaceae
  • Common Names: hairy rockcress, Pacific coast rockcress
  • Synonyms/Misapplications: Arabis hirsuta var. eschscholtziana, Arabis hirsuta var. glabrata
  • Codon: ARAHIR

Photo by Rod Gilbert. Also featured on Main Page

Taxonomy

Scientific classification
Kingdom: Plantae
Subkingdom: Virviriplantae
Phylum: Tracheophyta
Subphylum: Spermatophytina
Class: Magnoliopsida
Subclass: Rosanae
Order: Brassicales
Family: Brassicaceae
Genus: Arabis L.
Species: Arabis escholtziana Andrz.
Synonyms
  • Arabis hirsuta ssp. eschscholtziana (Andrz.) Hultén
  • Arabis hirsuta var. glabrata Torr. & A. Gray
  • Arabis hirsuta var. eschscholtziana (Andrz.) Rollins

[1]

Description

General: Biennial from a simple crown and strong taproot, the 1-several simple stems 1.5-10 dm. tall, pubescent at the base with stiff, simple hairs, becoming glabrous above.[2]

Leaves: Leaves mainly cauline, the basal oblanceolate, 2-8 cm. long, narrowed to short, winged petioles, mostly glabrous on the upper surface, the lower surface purplish, pubescent with stiff, simple hairs; cauline leaves alternate, 5-15, remote to overlapping, sessile and auriculate, ovate-lanceolate to narrowly lance-elliptic, 2-12 cm. long and up to 3 cm. broad, pubescent as the basal leaves or the upper glabrous.[2]

Flowers: Inflorescence of many-flowered, simple to compound racemes; pedicels 6-9 mm. long; sepals 4, 3-5 mm. long, glabrous, the outer 2 gibbous-based; petals 4, white to cream or pinkish, 4-9 mm. long; stamens 6; style 0.5-1 mm. long. Fruit: Siliques glabrous, 3-8 cm. long and 1-2 mm. broad, 1-nerved, strictly erect; seeds in 1 series, 1.5-2 mm. long, wingless or with a wing up to 0.3 mm. broad.[2]

Bloom Period

April to July[2]

Distribution

Covering much of North America, in Washington more common east of the Cascade crest.[2]

Habitat

Moist to dry, usually calcareous, open situations: open woods, stream banks, ledges, cliffs, bluffs, and floodplains. It occurs frequently in disturbed habitats. Dunes and dry banks, rocky/chalk, limestone slopes and gravelly native prairie. Plants seem to be more abundant where grazing is light.[3]

Uses

Propagation

Sow the seed as soon as it is ripe in a light position in a cold frame. Seed can also be sown in spring. When large enough to handle, prick the seedlings out into individual pots and plant them out in the summer. Conduct divisions after flowering, usually in the spring. The divisions can be planted into their permanent plots if required. [4]

Seed

Arabis hirsuta, photo: Lisa Hintz

Seed sample from: 2011

Average Measurement: 1.6 x 0.9 x 0.2

Measurement Range: L: 1.3 - 1.75, W: 0.6 - 1, D: 0.1 - 0.3

Features

Shape: Seeds flat, somewhat winged, especially at hilum end and opposite. Accumbent cotyledons and sulcus present.

Color: Seed dark brown in center, darkening to black at the winged edges. Hilum inconspicuous.

Surface: Texture is bumpy, and seed is somewhat lustrous.

Latitudinal Cross Section: elliptical ARHI-lat-crosssection.png

Longitudinal Cross Section: elliptical ARHI-long-crosssection.png


Basic Explanations and Assumptions:

The dimensions for the seeds are length x width x depth. The location of the hilum is used as the base of the seed, and the length is measured from hilum to the opposite apex. Where a style is present, the length is measured from the hilum to the bottom of the style. Width is measured at a right angle to the length at the widest part. Depth is measured at a right angle to the intersection of height and width lines.

Measurements included are the mean average for each measurement of ten separate seeds.

All measurements in millimeters unless otherwise noted.

Photo Gallery

References

  1. Integrated Taxonomic Information System. Retrieved from https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=508988
  2. 2.0 2.1 2.2 2.3 2.4 WTU Herbarium, Burke Museum, & University of Washington. Retrieved from http://biology.burke.washington.edu/herbarium/imagecollection/taxon.php?Taxon=Arabis%20eschscholtziana
  3. University of Washington. Retrieved from https://depts.washington.edu/propplnt/Plants/Arabis.htm.
  4. Rice, G. (1988). A Wide Range of Perennial Plants that can be Grown in Britian and How to Grow Them. Volume 2. Thompson and Morgan.