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Arctic Meadow Rue

Thalictrum alpinum L.

Brief Summary

    Thalictrum alpinum: Brief Summary
    provided by wikipedia

    Thalictrum alpinum is a species of flowering plant in the buttercup family known by the common names alpine meadow-rue and arctic meadow-rue. It is native to Arctic and alpine regions of North America and Eurasia, including Alaska, northern Canada, and Greenland, and it occurs in cold, wet, boggy habitats in high mountains farther south.

Comprehensive Description

    Thalictrum alpinum
    provided by wikipedia

    Thalictrum alpinum is a species of flowering plant in the buttercup family known by the common names alpine meadow-rue[1][2] and arctic meadow-rue. It is native to Arctic and alpine regions of North America and Eurasia, including Alaska, northern Canada, and Greenland, and it occurs in cold, wet, boggy habitats in high mountains farther south.

    Description

    Alpine meadow-rue is a rhizomatous perennial herb growing up to 5 to 25 cm (2 to 10 in) tall. The stems are erect and usually unbranched and leafless. Most of the leaves form a basal rosette, their compound blades are one to two pinnate and divided into small, triangular-ovate, scalloped leaflets. Each leaflet is longer than it is broad, slightly recurved, shiny dark green above and pale bluish-green below. The inflorescence is a raceme of flowers that arches over as the flowers and fruit develop. Each flower has a bell-shaped calyx of green or purplish sepals bearing up to fifteen long purple stamens tipped with large yellow anthers. There is a single carpel and no petals. The fruit is a dry achene with longitudinal ridges and tipped with a bristle. This species is normally pollinated by wind while other species of meadow-rue are usually insect-pollinated.[3]

    Phytochemistry

    The plant contains an alkaloid 'Thalidisine', which is also present in other Thalictrum species.[4]

    Distribution and habitat

    Alpine meadow-rue has a circumboreal distribution and is found in northern Europe and Asia, Alaska, northern Canada and Greenland as well as mountain ranges further south. Its natural habitat is tundra, open birch woodland, the banks of streams and rivers, the shores of lakes, alpine meadows and boggy areas. It is occasionally found on fens among and on the fringes of coniferous forests.[3]

    References

    1. ^ "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-01-25. Retrieved 2014-10-17..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""'"'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
    2. ^ "Thalictrum alpinum". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 9 December 2015.
    3. ^ a b "Alpine Meadow-rue". NatureGate. Retrieved 2013-12-24.
    4. ^ S.W. Pelletier (Editor) Alkaloids: Chemical and Biological Perspectives, Volume 14, p. 48, at Google Books

Distribution

    Distribution
    provided by eFloras
    Greenland; B.C., Nfld., N.W.T., Que., Yukon; Alaska, Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wyo.; n Eurasia.
    Distribution
    provided by eFloras
    Gansu, Hebei, Ningxia, Qinghai, Shaanxi, Shanxi, Sichuan, Xinjiang, Xizang, Yunnan [Afghanistan, Bhutan, India, Kazakhstan, Mongolia, N Myanmar, Nepal, Pakistan, Russia (Siberia), Sikkim, Vietnam; Europe, North America].

Morphology

    Description
    provided by eFloras
    Stems erect, scapose, or nearly scapose with very slender rhizomes, (3-)5-20(-30) cm, glabrous. Leaves all basal or single cauline leaf near base, 2-10 cm. Leaf blade 2×-pinnately compound, proximal primary divisions ternate; leaflets cuneate-obovate to orbiculate, apically 3-5-lobed, 2-10 mm, surfaces glabrous. Inflorescences racemes, usually elongate, few flowered. Flowers: pedicels recurved in fruit; sepals early deciduous, purplish tinged, ovate or elliptic, 1-2.3(-2.7) mm; stamens 8-15; filaments purple; anthers bright yellow, 1.5-3 mm; stigmas purple. Achenes 2-6, nearly sessile; body lance-obovoid, 2-3.5 mm, with thick veins. 2 n = 14, 21.
    Description
    provided by eFloras
    Plants 5--40 cm tall, glabrous. Roots fibrous. Rhizome slender. Stems simple or rarely branched, erect. Leaves 4 or more, all basal; petiole 1.5--3 cm; leaf blade pinnately 2-ternate, 1.5--4 cm; leaflets cuneate-obovate to orbicular-ovate, 3--5 × 3--5(--20) mm, thinly leathery, apex 3(--5)-lobed; lobes crenate. Inflorescence racemelike, few flowered; peduncle simple or branched. Pedicel erect or recurved at anthesis, recurved in fruit. Sepals early deciduous, purplish tinged, ovate to elliptic, ca. 2 mm. Stamens 7--10(--15); filament purplish, filiform; anther yellow, 1.2--3 mm, apex mucronate. Carpels (2--)3--5(--6); stigma purple, narrowly triangular, equaling ovary. Achenes shortly stipitate or sessile; body narrowly ovoid to lanceolate-obovoid, 2--3.5 mm; persistent style broadly triangular; veins ca. 8, stout. Fl. Jun--Aug.

Diagnostic Description

    Synonym
    provided by eFloras
    Thalictrum alpinum var. hebetum B. Boivin

Habitat

    Habitat
    provided by eFloras
    Wet meadows, damp rocky ledges and slopes, and cold (often calcareous) bogs in willow-sedge, lodgepole pine, and spruce-fir; 0-3800m.
    Habitat
    provided by eFloras
    Damp valleys, slopes, meadows, bogs; 2400--5300 m.

Cyclicity

    Flowering/Fruiting
    provided by eFloras
    Flowering late spring-summer (Jun-Aug).