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Hackelia cronquistii
''Hackelia cronquistii'' is a species of flowering plant in the borage family known by the common name Cronquist's stickseed. It is native to the western United States, where it is known from a small range around the border between Oregon and Idaho.〔(''Hackelia cronquistii''. ) The Nature Conservancy.〕〔(''Hackelia cronquistii''. ) Center for Plant Conservation.〕
This plant is a perennial herb growing up to 65 centimeters tall, growing from a taproot and branching caudex. The erect stems are lightly hairy toward the top and hairless near the bases. The leaves near the base of the plant are up to 21 centimeters long and 3.5 wide. They become smaller farther up the stem. The forget-me-not flowers are blue-tinged white and measure up to 1.5 centimeters wide. Flowering occurs mainly in May. The fruit is a small nutlet.〔
This plant was formerly treated as a variety of ''Hackelia patens'', and was elevated to species status in 1972.〔(''Hackelia cronquistii''. ) Oregon Department of Agriculture.〕 It was known from just one population until 1982, when more were found.〔 It was thought to be just from Oregon until 1993, when it was found in Idaho.〔 Its habitat is sagebrush dominated by ''Artemisia tridentata''. It grows on sandy soils.〔 Associated plant species include ''Achillea millefolium'', ''Achnatherum hymenoides'', ''Arabis'' sp., ''Balsamorhiza sagittata'', ''Chrysothamnus viscidiflorus'', ''Crepis acuminata'', ''Ericameria nauseosa'', ''Eriophyllum lanatum'', ''Erysimum capitatum'', ''Festuca idahoensis'', ''Leymus cinereus'', ''Lupinus argenteus'', ''Phlox longifolia'', ''Poa secunda'', ''Pseudoroegneria spicata'', and ''Purshia tridentata''.〔
There are about 52 populations known today. It is endemic to one small region, but it may be locally abundant. The populations are considered stable.〔
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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