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Eutrema edwardsii R. Br.
EDWARDS MOCK WALLFLOWER
Life   Plantae   Dicotyledoneae   Brassicaceae   Eutrema

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Peronosporaceae  Peronospora parasitica @ BPI (1)
Pucciniaceae  Puccinia eutremae @ BPI (2)

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Eutrema edwardsii R. Br.
Edwards' mock wallflower


General Information
Symbol: EUED
Group: Dicot
Family: Brassicaceae
Duration: Perennial
Growth Habit : Forb/herb
Native Status : AK   N
CAN   N
GL   N
Data Source and Documentation
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green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   

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Synonyms

Classification

Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Dilleniidae
Order Capparales
Family Brassicaceae ⁄ Cruciferae – Mustard family
Genus Eutrema R. Br. – eutrema
Species Eutrema edwardsii R. Br. – Edwards' mock wallflower

Subordinate Taxa

This plant has no children

Legal Status

Wetland Status

Interpreting Wetland Status

North America
Alaska FAC
Western Mountains, Valleys, and Coast OBL

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Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover


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Following modified from Flora of North America
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Link to Flora of North America home
 
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FNA Vol. 7 Page 554 , 555, 556 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 7 | Brassicaceae | Eutrema

1. Eutrema edwardsii R. Brown, Chlor. Melvill. 9, plate A. 1823.

Eutrema edwardsii subsp. penlandii (Rollins) W. A. Weber; E. labradoricum Turczaninow; E. penlandii Rollins

Perennials; (roots fleshy). Stems simple or few from caudex, erect, unbranched, (0.3-)0.8-3 (-4.5) dm. Basal leaves (soon withered); rosulate; petiole 1-4.5(-6) cm; blade (somewhat fleshy), ovate, lanceolate, or oblong, (0.3-)0.8-2(-2.5) cm × (1-)4-14(-18) mm, (base truncate, obtuse, or cuneate, sometimes oblique), margins entire, apex obtuse. Cauline leaves 3-7(-10); petiolate or (distal) sessile; blade ovate, lanceolate, oblong, or linear, (0.7-)1-3(-4) cm × (1-)3-10(-14) mm, base cuneate, margins entire, apex subacute. Racemes considerably elongated in fruit. Fruiting pedicels divaricate to ascending, (curved-ascending or straight), (1.5-)3-10(-15) mm. Flowers: sepals ovate, 1.5-3 × 1-1.5 mm, (margins membranous); petals spatulate, 3-5 × 1.5-3 mm; filaments 2-2.5 mm; anthers ovate, 0.2-0.4 mm; gynophore usually 0.2-1 mm, rarely obsolete. Fruits stipitate, not torulose, linear to narrowly oblong, (0.7-)1-2(-2.5) cm × 2-3 mm slightly 4-angled; valves (cuneate basally and distally), each with prominent midvein; septum mostly perforate; ovules (6-)8-12(-14) per ovary; style 0.2-1 mm. Seeds usually oblong, rarely ovoid, (1.5-)2-3 × (0.7-)1-1.5 mm. 2 n = 18, 28, 42, 56.

Flowering early Jun-early Aug, fruiting Jul-early Sep. Tundra, talus slopes, glaciated hills, grassy margins of streams, wet areas of peat ridges; 0-3900 m; Greenland; B.C., N.W.T., Nunavut, Que., Yukon; Alaska, Colo.; Asia (Mongolia, Russia).

Plants of Eutrema edwardsii from Alaska, northern Canada, and Greenland grow at elevations of 0-1900 m; those of Colorado, treated by R. C. Rollins (1993) as E. penlandii , grow at 3700-3900 m.

An examination of collections of Eutrema edwardsii from its entire range amply demonstrates that it is a highly variable species that can easily accommodate E. penlandii. Although the latter is known from the high mountains of Park County (Colorado), its plants are indistinguishable from those of E. edwardsii from Greenland, and the higher latitudes in Alaska, British Columbia, Northwest Territories, Nunavut, and Yukon. In general, plants of E. edwardsii from lower latitudes tend to be far more robust than those of higher latitudes. R. C. Rollins (1993) indicated that E. penlandii is distinguished from E. edwardsii by having stems less than 10 (versus 10-45) cm, lingulate (versus obovate) petals, fruiting pedicels less that 4 (versus 5-10) mm, infructescence less than 5 (versus to 20) cm, and cordate (versus truncate or cuneate) basal leaves. In fact, the petals of E. penlandii are spatulate, just as those of most plants of E. edwardsii , and the basal leaves in E. penlandii (e.g., Penland 3909 and Weber 13315 , both at GH) are cuneate. Furthermore, some plants from Greenland (e.g., Raup et al. 465 , GH) are almost identical to those of E. penlandii , and they are only 3-8 cm with narrowly obovate petals, fruiting pedicels 2-4 mm, and infructescence 2-3 cm. Other examples of E. edwardsii that show some or all of the above aspects of E. penlandii could be cited. Weber treated E. penlandii as a subspecies of E. edwardsii , but the only difference I see between the two is geographic. Such distinction is unacceptable because the widely disjunct populations of E. edwardsii within Russia would have to be treated that way too.

As Eutrema penlandii, E. edwardsii is in the Center for Plant Conservation's National Collection of Endangered Plants.

Updated: 2020-05-30 16:19:23 gmt
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