Kentucky Nature Preserves Rare Plants

Kentucky State Nature Preserves Commission

Turk's Cap Lily
Lilium superbum
Family: Liliaceae

Protection Status:
State Status:  T
USFWS Status: {null}

Global Rank: G5
State Rank: S1S2

Moist meadows, moist/wet woods including floodplains and coves

Species Description:
Perennial herb.

Flowering Period: Early July to late August.
Fruiting Period: Early September to late October.

Additional Information at NatureServe

Diagnostic Characteristics:
Leaves of this lily are whorled on the stem (the upper ones alternate). They are smooth or may be slightly papillose along the margin. The flowers are nodding (turned down) and the tepals (appearing as flower petals) are recurved from near the base (not from the middle) and each has a distinct green area of 1-1.5 cm at the base. The midvein of the outer tepals has 2 ridges. Anthers are 15-25 mm in length are narrow.

The habitat for this species is especially sensitive to changes in hydrology and not likely to withstand much alteration. Grazing or browsing pressure, vegetation removal, hydrologic changes (i.e. stream alterations road construction) would be detrimental. Woody plant invasion may need to be controlled using periodic prescribed fire, mowing or other means to maintain the open character of the habitat for this species. Hand removal of trees in the vicinity of the species is necessary. Soil disturbance resulting from activities such as ATV trails, timber removal or any activity that results in increased erosion and weed invasion will be detrimental. Exotic pest plants are a threat to this species and should be removed.

Global Range:
Common in Virginia, N. Carolina, and S. Carolina; rare in Great Lakes region. Native in North Central Plateau.

Known Kentucky Occurrences:

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Data last updated: Wednesday, May 28, 2014
Kentucky State Nature Preserves Commission
801 Teton Trail
Frankfort,KY 40601
Phone: (502) 573-2886
Fax: (502) 573-2355
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