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Bouncing Bet, Common Soapwort, Crow Soap, Wild Sweet William, Soapweed - Saponaria officinalis


Family: Caryophyllaceae - Pink family Genus Common Name: Soapwort Native Status: IntroducedDicot Perennial Herb
Saponaria officinalis - Bouncing Bet, Common Soapwort, Crow Soap, Wild Sweet William, Soapweed. Saponaria is a medium-sized genus of about 40 species worldwide, but only 2 of them are found in North America; both of those are non-native. The one presented here is Saponaria officinalis, found in every state except Alaska and Hawaii. The other is Saponaria ocymoides (Rock Soapwort), which is a smaller, branching plant, frequently with reclining stems, is found only in a few states, and rarely persists long once it escapes the garden; both plants have been frequently used in gardens.

Saponaria species contain saponin, which is toxic. The leaves and roots of Saponaria officinalis have been used in the past to make a liquid soap by soaking or boiling them in water.

Found in:


Found in:
AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY, GS
Saponaria officinalis

Distribution of Saponaria officinalis in the United States and Canada:
Map unavailable.
Map courtesy of The Biota of North America Program.
Map color key

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Site: Meldrum Bay, Manitoulin Island, Ontario, Canada Date: 2015-August-10Photographer: Gerald C. Williamson
Nikon D7000
Tamron SP 90MM f/2.8 AF Macro
The inflorescence of Bouncing Bet (Saponaria officinalis) is a dense (to somewhat open) cyme of rose-pink to white flowers terminating the stem.
Saponaria officinalis

Site: Meldrum Bay, Manitoulin Island, Ontario, Canada Date: 2015-August-10Photographer: Gerald C Williamson
Nikon D7000
Bouncing Bet has 5 rose-pink to white petals (sometimes doubled based on cultivar escapees that have naturalized.) These petals reflex more and more as the plant ages. It has 10 stamens; here without anthers - I don't know if they haven't yet developed, or more likely have dropped from the remaining filaments. It has 2 (sometimes 3) styles.
Click on the photo for a larger image
Saponaria officinalis

Site: Ada County, ID Date: 2016-September-22Photographer: Gerald C Williamson
Nikon D7000
Saponaria officinalis has a long calyx tubes and shorter calyx lobes. Either or both of these may be green to reddish-purple and are subtended by paired small, leafy bracts.
Click on the photo for a larger image
Saponaria officinalis

Site: Ada County, ID Date: 2016-September-22Photographer: Gerald C Williamson
Saponaria officinalis grows up to about 3 feet tall, usually somewhat shorter. It is sparsely branched, perhaps with some small branches in the upper plant.
Click on the photo for a larger image
Saponaria officinalis

Site: Meldrum Bay, Manitoulin Island, Ontario, Canada Date: 2015-August-10Photographer: Gerald C Williamson
Nikon D7000
The leaves are opposing on the stem. They may be on short petioles, or may be sessile, with the lowest leaves connate. I haven't seen any mention of leafy stipules, so my interpretation of the smaller leaves at 90 degree angle to the main ones is that those are opposing leaves on the beginning of a branch.
Click on the photo for a larger image
Saponaria officinalis

Site: Ada County, ID Date: 2016-September-22Photographer: Gerald C Williamson
Nikon D7000
The leaves are ovate, elliptic, or spatulate. They usually have 3, occasionally 5, prominent veins. The stem is terete - round or oval without ribs. I have seen plants both with green and with red stems.
Click on the photo for a larger image
Saponaria officinalis

References used for identification and information:
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Saponaria officinalis initially published on USWildflowers.com 2018-04-14; Updated 2018-04-14

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All content except USDA Plants Database map Copyright Gerald C. Williamson 2024
Photographs Copyright owned by the named photographer



Code Update 20230302