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Yellow Star Grass
Hypoxis hirsuta
36.1037, -95.9796
Field Notes
Description:
This small native perennial plant consists of a rosette of slender basal leaves and shorter flowering stems. The linear basal leaves are up to 1' tall and ½" across. They have scattered white hairs. The flowering stems are up to 8" tall, and have scattered white hairs as well. Each of these stems terminates in a rather loose umbel of two or more yellow flowers. A flower is about ¾" across and consists of 6 tepals that spread outward. In the center, a yellow pistil is surrounded by 6 stigmas with prominent yellow anthers. Each anther is shaped like an upside-down V. The blooming period occurs from mid-spring to early summer and lasts about a month. Sometimes there is a mild floral fragrance. Each seed capsule splits open irregularly, releasing several glossy black seeds that are covered with concentric rows of wart-like projections. The root system consists of small corms.
Habitat:
Yellow Star Grass occurs in the majority of counties in Illinois (see Distribution Map). While it is widely distributed, this plant is not particularly common in any given locality. Habitats include mesic black soil prairies, hill prairies, savannas, open woodlands and paths through woodlands, fens, sandstone glades, abandoned fields, and lawns. Like Claytonia virginica (Spring Beauty), Yellow Star Grass can spread into lawns if mowing is delayed until late in the spring. Fidelity to any particular habitat is low.
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