Silene noctiflora (Night-flowering Catchfly) - photos and description


Flower open at 8 pm in the evening


Flower open at 7:30 pm in the evening


Above photo taken at 8:15 pm, flowers open 


Photo taken at 7:30 pm, flowers opening

 

 
Above photo taken at 8:15 pm, flowers open 


Flowers opening at 7:30 pm


Photo taken at 3 pm, flower bud will open that evening


The calyx swells in days after the flower is spent, photo taken at 3 pm


Photo taken at 3 pm, flowers not open in afternoon


Above photo taken at 3 pm, flowers not open during afternoon


Above photo taken at 3 pm, flowers not open during afternoon


Photo taken at 3 pm, spent flowers from previous nights

 

General: Upright annual, branching mid-stem. Foliage villous, with long white hairs and shorter glandular hairs. Foliage is sticky, particularly the inflorescence. Has been declared a noxious weed in Saskatchewan.

Flowers: Elongated racemes from upper leaf axils. Flowers open in evenings, in our plants beginning about 7 pm. Flowers white or pinkish-white, having 5 petals each divided to the middle, we measured a flower from 20 - 23 mm diameter. The calyx has 10 prominent green or brownish green veins. The calyx has 5 linear lobes, we measured the lobes to 5 mm long. The calyx is oblong when the flower is new or in bud, the calyx swells to an ovate shaped once the flower is spent. Flowers have a slight fragrance.

Leaves: Leaves are cauline, sessile, opposite, lanceolate to linear-lanceolate, entire. We measured a leaf mid-stem at 15 mm long and 13 mm wide. Each pair of leaves grows at a right angle to the pair of leaves above and below it.

Height: Height listed in Budd's Flora to 90 cm, we measured plants to 64 cm tall.

Habitat: Crops and ditches in southern Saskatchewan.

Abundance: Common.

Origin: Introduced.

How to identify this species: Annual, foliage sticky, flowers open in the evening, the calyx has 5 linear teeth each about 5 mm long, the calyx has 10 prominent green or brownish green veins, the calyx is oblong in shape for new flowers and after the flowers are spent the calyx swells to an ovate shape, flowers are more or less white and 20 to 23 mm in diameter.

When and where photographed: The above photos were taken July 19th and 20th, weedy ditch beside grid road about 10 km southeast of our home in Regina, SK.