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| Boltonia asteroides var. recognita (Fern. & Grisc.) Cronq. | Species Image Gallery (opens in a new window) |
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| TAXONOMY | |||||||||||||
| Family: | Asteraceae or Compositae | ||||||||||||
| Genus: | Boltonia | ||||||||||||
| Species Synonyms: | Boltonia latisquama var. microcephala
Fern. & Grisc. Boltonia latisquama var. occidentalis Gray Boltonia latisquama var. recognita Fern. & Grisc. Boltonia recognita (Fern. & Grisc.) G.N. Jones. |
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| Common Names: | aster-like boltonia white doll’s daisy |
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| DISTRIBUTION | |||||||||||||
| Canada: | southern Saskatchewan – southern Manitoba | ||||||||||||
| Saskatchewan: | southern Saskatchewan; Moose Jaw Creek, Long Creek – upper Souris River Valleys, Moose Jaw | ||||||||||||
| Ecoregion: | Mixed Grassland, Moist Mixed Grassland | ||||||||||||
| HABITAT | |||||||||||||
| Saskatchewan: | sloughs and ditches | ||||||||||||
| Associated Species: | Carex atherodes, Coreopsis tinctoria, Echinochloa sp., Mentha arvensis, Pascopyrum smithii, Potentilla norvegica, Potentilla rivalis, Rumex stenophyllus, Rumex pseudonatronatus, Symphyotrichum lanceolatum var. hesperium | ||||||||||||
| RARITY STATUS | |||||||||||||
| Provincial
Status According to Harms (2003): |
Threatened |
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| Nature Conservancy Status: | G5T3T5 S2 |
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| Saskatchewan
Species at Risk Status: |
None |
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| COSEWIC Status: | None |
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| Boltonia asteroides var. recognita is threatened because it is regionally restricted in Saskatchewan. Some local populations are small. No immediate threats are known for this species. | |||||||||||||
| SPECIES DESCRIPTION | |||||||||||||
| Height: | to 150 cm | ||||||||||||
| Roots: | woody rhizomes | ||||||||||||
| Stems: | much branched, woody at base, dark green with straw coloured stripes, glabrous | ||||||||||||
| Leaves: | cauline, alternate, (sub)sessile, many, 5 – 15 cm long, 5 – 20 mm wide, reduced upwards, linear to narrowly lanceolate, apex acute to mucronate, glabrous, entire | ||||||||||||
| Inflorescence: | heads in bracted corymbs; phyllaries in 3 unequal to nearly equal series, 6 – 15 mm long, to 1.3 mm broad, the inner surpassing the outer, linear, apex acute, straw-coloured at base, tip green or brown, midvein brown; receptacle naked | ||||||||||||
| Flowers: | ligulate and tubular; ligulate florets 20 – 60, 5 – 10 mm long, white to lilac, 2 veins on surface, pistillate, fertile, pappus of minute bristles and 2 – 4 awns; tubular florets yellow, perfect, fertile, style with externally papillate appendages | ||||||||||||
| Fruits: | achene 2 – 3 mm long, nearly flat, callous-winged, glabrous; pappus of awns, 1 – 2 mm long | ||||||||||||
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