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Arabidopsis lyrata (L.) O'Kane & Al-Shehbaz Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Published In: Novon 7(3): 325. 1997. (Novon) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 7/21/2009)
 

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6. Arabidopsis lyrata (Linnaeus) O’Kane & Al-Shehbaz, Novon 7: 325. 1997.

Herbs, biennial or perennial with a caudex and stolons. Stems (5–)10–30(–45) cm, erect or decumbent, 1 to numerous from base, usually branched and straight or flexuous above, basally pilose or subhirsute with simple and forked trichomes, apically glabrous. Basal leaves rosulate; petiole 0.4–2(–6) cm; leaf blade oblanceolate or ovate, (0.5–)1–3(–8) x (0.3–)0.5–1.5 cm, adaxially with a mixture of simple and stalked, 1-forked trichomes, rarely glabrous, margin entire, dentate, lyrate, or pinnatifid with 1–3 lateral lobes on each side, apex obtuse; cauline leaves shortly petiolate and uppermost often sessile; blade of middle ones oblanceolate, (0.5–)1–3.5(–5.5) x (0.1–)0.2–0.7(–1.3) cm, entire, repand, or obscurely toothed, rarely lower ones lobed, gradually reduced in size upward. Fruiting pedicels ascending to divaricate, straight, (0.4–)0.7–1.2(–1.5) cm. Sepals 2–3 mm, glabrous or densely pubescent, lateral pair saccate; petals white, rarely lavender or purplish, spatulate or obovate, 4–8(–9) x 1.5–3(–3.5) mm; claw not toothed; filaments white, 2–3 mm; ovules 20–36 per ovary. Fruits linear, flattened, torulose, (1–)2–4.5(–6) cm x 0.5–1.5 mm; valves with a distinct midvein extending full length; gynophore to 0.5 mm; style obsolete or to 1 mm. Seeds oblong, flattened, light brown, 0.8–1.2 mm, wingless, sometimes distally margined; cotyledons accumbent. 2n = 16, 32.

Flowering: Mar–Oct.

Habitat: cliffs, calcareous ledges and bluffs, rock crevices, ledges, thickets, sandy areas in open woods, sand dunes, river banks, flooded areas, sandstone hills, serpentine rocks and barrens, shale, talus, tundra, roadsides, gravelly slopes, forests, volcanic ash.

Elevation: 03500 m.

Distribution: Austria, Canda (Alberta, British Columbia, Manitoba, Northwest Territoris, Ontario, Saskatchewan, Yukon), Czech Republic, England, Germany, Hungary, Iceland, Ireland, N. Italy, Norway, NE European Russia, Scotland, Sweden, Ukraine, United States (Alaska, Connecticut, Delaware, District of Columbia, Illinois, Indiana, Iowa, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Vermont, Virginia, West Virginia, Wisconsin).

Three subspecies.

 

 

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                                       Key to the subspecies of Arabidopsis lyrata

1. Basal leaves entire or toothed; older plants with well-developed, often branched, somewhat thickened caudex    6b. subsp. petraea

1. Basal leaves lyrate or lyrate-pinnatifid; older plants often with a slender unbranched caudex or root crown.

2.  Basal leaves usually pubescent; petioles often hirsute; petals 6–8 mm; fruit 0.8–1 mm wide; style 0.5–1 

     mm........................................................................................................................................................... 6a. subsp. lyrata

2.  Basal leaves glabrous or sometimes sparsely pubescent; petioles often glabrous; petals (4–)5–5.5(–6) mm;

    fruits 1.2–1.5(–1.8) mm wide; style obsolete or to 0.5 mm... ..............................................................6c. subsp. kamchatica

 

 


 

 
 
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