States designate Hemerocallis fulva as invasive

American Hemerocallis Society reports that several state and agency publications and Web sites list Hemerocallis fulva as invasive.

Commonly called tiger lily, roadside ditch lily, common orange daylily and tawny lily, this plant has a long life span and has been used in erosion control along drainage ditches and near old home sites. It has been considered invasive in certain settings where its slow spread could displace some native plants over time.

H. fulva is an infertile triploid that does not set seed, but does spread by rhizomes. If left unattended, it can form large colonies.

AHS recommends selecting and planting hybrid cultivars that are clump forming and noninvasive.

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For more: American Hemerocallis Society, 6713 Wade Stedman Road, Wade, NC 28395; (910) 483-2838; lsbarnes@nc.rr.com; www.daylilies.org/AHSinforeleaseinvasives.pdf.