IUCN threat status:

Not evaluated

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It can be difficult to distinguish the different species of Blue-Eyed Grass. The white form of Prairie Blue-Eyed Grass (as illustrated in the photographs) is quite similar in appearance to Sisyrinchium albidum (White Blue-Eyed Grass). Like most Sisyrinchium spp., Prairie Blue-Eyed Grass produces a single umbel of flowers between a pair of bracts on each flowering stalk, while White Blue-Eyed Grass produces 2 pairs of bracts with 2 umbels of flowers on each flowering stalk. White Blue-Eyed Grass also has slightly larger seed capsules and slightly wider leaves and flowering stalks. When Prairie Blue-Eyed Grass has blue-violet flowers, it can be confused with other Sisyrinchium spp. Generally, Prairie Blue-Eyed Grass has leaves and flowering stalks that are no wider than those of other species, and it never produces secondary flowering stalks from the primary flowering stalks that originate from among the basal leaves. The common name for this genus, Blue-Eyed Grass, is something of a misnomer because the flowers, whether white or blue-violet, have yellow centers. Return

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© John Hilty

Source: Illinois Wildflowers

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