Silene conoidea
Encyclopedia
Silene conoidea is a species of flowering plant in the pink family
Caryophyllaceae
The Caryophyllaceae, commonly called the pink family or carnation family, is a family of flowering plants. It is included in the dicotyledon order Caryophyllales in the APG III system, alongside 33 other families, including Amaranthaceae, Cactaceae and Polygonaceae...

 known by the common names weed silene and large sand catchfly. It is native to Eurasia, and it is known in other parts of the world, such as western North America, as a weed
Weed
A weed in a general sense is a plant that is considered by the user of the term to be a nuisance, and normally applied to unwanted plants in human-controlled settings, especially farm fields and gardens, but also lawns, parks, woods, and other areas. More specifically, the term is often used to...

. It is an annual herb growing up to a meter in height with a hairy, partially glandular stem. The lance-shaped leaves are up to 12 centimeters long near the base of the plant and smaller farther up. The flower is enclosed in an inflated, hairy, glandular calyx of fused sepal
Sepal
A sepal is a part of the flower of angiosperms . Collectively the sepals form the calyx, which is the outermost whorl of parts that form a flower. Usually green, sepals have the typical function of protecting the petals when the flower is in bud...

s which is ridged with many veins. It is open at the top, revealing five bright pink petals.

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