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| Halimolobos virgata (Nutt.) O.E. Schulz | Species Image Gallery (opens in a new window) |
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| TAXONOMY | |||||||||||
| Family: | Brassicaceae | ||||||||||
| Genus: | Halimolobos | ||||||||||
| Species Synonyms: | Sisymbrium virgatum Nutt. | ||||||||||
| Common Names: | halimolobos rod halimolobos stemmy halimolobos slender mouse-ear cress |
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| DISTRIBUTION | |||||||||||
| Canada: | southeastern Alberta - southwestern Saskatchewan | ||||||||||
| Saskatchewan: | southwestern Saskatchewan; Cypress Hills and surrounding area | ||||||||||
| Ecoregion: | Mixed Grassland, Moist Mixed Grassland, Cypress Upland | ||||||||||
| HABITAT | |||||||||||
| Saskatchewan: | silty, sandy, or clay soils on eroded or grazed grassland slopes and flats | ||||||||||
| Associated Species: | Allium textile, Androsace occidentalis, Arabis holboellii var. retrofracta, Astragalus pectinatus, Carex duriuscula, Chenopodium leptophyllum, Draba nemorosa, Lappula occidentalis var. occidentalis, Poa cusickii, Rosa spp., Selaginella densa | ||||||||||
| RARITY STATUS | |||||||||||
| Provincial
Status According to Harms (2003): |
Endangered |
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| Nature Conservancy Status: | G2G3 N2 S1 |
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| Saskatchewan
Species at Risk Status: |
Endangered |
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| COSEWIC Status: | Endangered |
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| Halimolobos virgata is endangered because it is rare and somewhat regionally restricted in the province. In addition, population sizes vary. Possible threats have been identified for this species, including occurring in a fragile habitat. | |||||||||||
| SPECIES DESCRIPTION | |||||||||||
| Height: | 20 – 40 cm | ||||||||||
| Roots: | taproot slender | ||||||||||
| Stems: | caudex small; stem solitary, simple to sparingly branched, pubescence mixed, long, branched, or straight hairs | ||||||||||
| Leaves: | basal rosette, 1 – 4 cm long, 3 – 9 mm wide, narrowly oblanceolate to lanceolate, pubescent, margin entire to dentate; cauline leaves alternate, sessile to auriculate clasping, 1 – 4 cm long, 4 – 6 mm wide, slightly reduced upwards, lanceolate to oblong, margin dentate to entire | ||||||||||
| Inflorescence: | raceme ebracteate; pedicels slender | ||||||||||
| Flowers: | calyx purplish; corolla to 4 mm long, white with pinkish veins | ||||||||||
| Fruits: | silique 4 – 10 mm long, 1 – 2 mm wide, terete, purplish, glabrous; seeds biseriate | ||||||||||
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