Silene noctiflora (Night-flowering Catchfly)

Plant Info
Also known as: Night-flowering Campion
Genus:Silene
Family:Caryophyllaceae (Pink)
Life cycle:annual
Origin:Europe
Status:
  • Weedy
Habitat:part shade, sun; disturbed soil; fields, roadsides, waste areas, clearings
Bloom season:June - September
Plant height:8 to 30 inches
Wetland Indicator Status:none
MN county distribution (click map to enlarge):Minnesota county distribution map
National distribution (click map to enlarge):National distribution map

Pick an image for a larger view. See the glossary for icon descriptions.

Detailed Information

Flower: Flower shape: 5-petals Cluster type: panicle

[photo of flowers] Loose branching cluster of up to 15 stalked flowers at the top of the plant and arising from the upper leaf axils. Flowers are ¾ to 1 inch across with 5 white petals that are sometimes tinged yellow or pink, and are divided into 2 lobes. A short, ruffled appendage is attached to the petal at the mouth of the throat. 10 stamens and 3 styles are hidden inside the tube, the tips just visible at the mouth but not extending out of it.

[photo of calyx] The calyx is about ½ inch long at flowering time with 10 prominent veins and 5 long, narrow lobes at the tip. The calyx and flower stalks are densely covered in long, spreading, non-glandular hairs and short, sticky, glandular hairs.

Leaves and stems: Leaf attachment: basal Leaf attachment: opposite Leaf type: simple

[photo of lower leaves] Leaves are toothless and densely hairy on both surfaces. Basal and lower stem leaves are 2 to 5 inches long, ¾ to 1¾ inches wide, generally spatula shaped with a short, winged stalked.

[photo of upper stem leaves] Middle and upper stem leaves are more lance-elliptic with pointed tips, becoming smaller and stalkless as they ascend the stem and reduced to bracts in the flower clusters. Stems are few-branched near the base, often branched in the upper plant, and densely covered in long, spreading hairs as well as sticky, glandular hairs in the upper plant.

Fruit: Fruit type: capsule/pod

[photo of fruit] Fruit is an egg-shaped capsule ½ to ¾ inch long that ripens to yellowish brown and splits open at the top, the 6 teeth strongly curved back. Inside are kidney-shaped seeds, dark brownish black with a gray bloom.

Notes:

Night-flowering Catchfly is often confused with another related weed, White Campion (Silene latifolia): both are glandular hairy and may be found in similar disturbed habitats. White Campion is best distinguished by having flowers that are either male or female, broader petal lobes, capsules with 10 teeth around the tip, and glandular hairs that are not sticky. By comparison, Night-flowering Catchfly has perfect flowers (both male and female parts), narrower petal lobes, capsules with 6 teeth, and sticky hairs. While both species bloom at night, Night-flowering Catchfly starts closing up in earlier morning where White Campion flowers may stay open until noon, or even later on cloudy days. We had been searching for Night-flowering Catchfly for some years without success, dissecting countless White Campion flowers looking for both stamens and pistils, all to no avail. It wasn't until we spotted a capsule with 6 teeth in the Whitewater Wildlife Management Area that we knew we had finally stumbled upon it. We collected the seed and grew it in our backyard garden to get the images you see on this page, then destroyed the plant. All in the name of science!

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More photos

Photos courtesy Peter M. Dziuk taken in his backyard garden, from seed collected in Winona County.

Comments

Have you seen this plant in Minnesota, or have any other comments about it?

Posted by: Linda - Maplewood near North St. Paul
on: 2016-07-17 13:38:31

I have this in one section of my garden. It looks pretty in the evening when the flowers open above the others. But I didn't plant it. It is a fairly new garden. Is this a weed and should I pull it? I don't want so e thing that will take over.

Posted by: K. Chayka
on: 2016-07-17 20:12:27

Linda, it is a weed but I don't believe it's a very prolific one.

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