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Calycocarpum lyonii (Cupseed)
Cressler, Alan

Calycocarpum lyonii

Calycocarpum lyonii (Pursh) A. Gray


Menispermaceae (Moonseed Family)


USDA Symbol: CALY2

USDA Native Status: L48 (N)


From the Image Gallery

2 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Vine
Leaf Retention: Deciduous
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Venation: Palmate
Leaf Margin: Lobed
Breeding System: Dioecious
Inflorescence: Panicle , Raceme
Fruit Type: Drupe
Size Notes: Size is indeterminate, but vines climb by twining and scrambling to the tops of tall trees, 30 feet or more in height. Young stems are often bluish-green. Older stems may develop warty bark and may be 1/2 inch in diameter. Vines die to the ground during
Leaf: Leaves are borne on new growth. The leaves have narrow petioles to about 1 foot long. The leaf is roughly pentagonal in shape. Deeply to shallowly 3-5-(7) lobed. To about 1 foot in length and width.
Flower: The inflorescence is best described as a narrow panicle. It is usually pendulous and emerges from the stem above a leaf node.
Fruit: The fruit is a green or black ellipsoid drupe about 1 inch long when mature. It contains a single seed, concave on one side. Often, multiple fruits are borne on a single infructescence.

Bloom Information

Bloom Color: White
Bloom Time: May , Jun
Bloom Notes: Male and female flowers are borne on separate plants. The flowers usually have 6, but as many as 12 cream-colored sepals and no petals.


USA: AL , AR , FL , GA , IL , IN , KS , KY , LA , MO , MS , OK , SC , TN , TX
Native Habitat: Found in deciduous, riparian forests.

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Additional resources

USDA: Find Calycocarpum lyonii in USDA Plants
FNA: Find Calycocarpum lyonii in the Flora of North America (if available)
Google: Search Google for Calycocarpum lyonii


Record Modified: 2018-05-18
Research By: JAM

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