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| Sagina nodosa (L.) Fenzl | Species Image Gallery (opens in a new window) |
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| TAXONOMY | |||||||||
| Family: | Caryophyllaceae | ||||||||
| Genus: | Sagina | ||||||||
| Species Synonyms: | none | ||||||||
| Common Names: | knotted pearlwort | ||||||||
| DISTRIBUTION | |||||||||
| Canada: | Mackenzie District - Keewatin District - Ungava - Labrador - southern Baffin Island, south to northeastern Alberta, to northwestern Saskatchewan - Manitoba - Ontario - Nova Scotia - Newfoundland | ||||||||
| Saskatchewan: | northwestern Saskatchewan; Lake Athabasca - Amisk Lake | ||||||||
| Ecoregion: | Churchill River Upland, Athabasca Plain, Tazin Lake Upland | ||||||||
| HABITAT | |||||||||
| Saskatchewan: | wet, sandy or rocky lake shores | ||||||||
| Associated species: | greater creeping spearwort, large St. Johnswort, white spruce | ||||||||
| RARITY STATUS | |||||||||
| Provincial
Status According to Harms (2003): |
Threatened |
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| Nature Conservancy Status: | G5 N2 S2 |
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| Saskatchewan
Species at Risk Status: |
None |
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| COSEWIC Status: | None |
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| Knotted pearlwort is threatened in Saskatchewan because it is rare or uncommon and is regionally restricted to one general area of the province. Most local populations are small. No threats are known or anticipated at this time. | |||||||||
| SPECIES DESCRIPTION | |||||||||
| Height: | 5 – 25 cm | ||||||||
| Roots: | fibrous | ||||||||
| Stems: | perennial, tufted, ascending to loosely spreading, simple or branched, very thin, to 1 mm wide, hairless, may be hairy at nodes | ||||||||
| Leaves: | opposite, sessile, 1 – 3 cm long, to 1 mm wide; middle and upper leaves strongly reduced and scale-like, subtending dense axillary bulb-like clusters of 4 fleshy leaflets, bulb-like clusters often replace flowers; lower leaves thread-like | ||||||||
| Inflorescence: | many-flowered, branched; stalks hairless or hairy | ||||||||
| Flowers: | five sepals, petals, and stamens; pale greenish petals; superior ovary | ||||||||
| Fruits: | capsule 3 – 4 mm long, valves thick, persistent sepals appressed; seeds dark brown or blackish, strongly pebbly-wrinkled, distinctly notched at point of attachment | ||||||||
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