IngredientsSilene californica Durand is a perennial herb in the family Caryophyllaceae. The name Silene californica was first formally published by Durand in Plantae Pratteanae Californicae in 1855, and the plant has also been treated as Silene laciniata var. californica (Durand) A. Gray. Additional synonyms on record include Melandrium californicum (Durand) Rohrb.
Current taxonomic opinion, as reflected in the Plants of the World Online (Kew Science) database and the Jepson Flora, treats the entity as Silene laciniata Cav. subsp. californica (Durand) J. K. Morton, a perennial herb native to California and also found elsewhere in western North America. Despite this reclassification, the binomial Silene californica Durand remains widely used in ethnobotanical and horticultural literature, and both names refer to the same plant. The subspecies is accepted by the Plants of the World Online database, with a native range restricted to California, and it grows primarily in the subtropical biome.
The genus Silene L. is one of the largest genera in Caryophyllaceae, with about 850 species distributed throughout Eurasia, from temperate regions of the Mediterranean basin to central and western Asia. The genus has seen numerous revisions to its circumscription. Silene taxonomy, traditionally based on morphological characteristics, is now driven by DNA sequence analysis.
The flowers are extremely showy, up to an inch across, and are a brilliant, scarlet-red with notched or slashed petals. The common name "Indian Pink" derives from this striking crimson coloration and the plant's historical association with indigenous Californian peoples.
Several leafy, somewhat straggling stems arise from the deep taproot of this perennial and are 6–16 inches long. The flowers are extremely showy, up to an inch across, and are a brilliant scarlet-red with notched or slashed petals. Pairs of dark-green leaves are covered with minute, sticky, soft hairs.
The Flora of North America (eFloras) provides a more detailed technical description: Stems are decumbent at base, straggling to erect, leafy throughout, sparsely branched, with soft, short pubescence. Proximal leaf blades are oblanceolate, sometimes broadly so, narrowed into short pseudopetiole, 2–6 cm × 6–25 mm; distal leaves are sessile, lanceolate or ovate-lanceolate to broadly elliptic, 2–9 cm × 5–30 mm, apex acute to shortly acuminate. Inflorescences are poorly developed, usually 1–3(–5)-flowered, open cymes; calyces are broadly tubular. Capsules are ovoid; the chromosome count is recorded as 2n = 48, 72.
The plant forms a thick taproot from which an upright or straggling, branching and slightly sticky stem emerges. Larger leaves are typically held on the lower portion of the stem and are triangular or lance-shaped. The flowers, though small, are dramatic; though the common name suggests they are pink, in fact they are typically a deep crimson. The species is very common in its preferred habitat, often growing in the partial shade of boulders, taller grasses, or larger shrubs.
Silene californica is an herb that is native to California and also found elsewhere in western North America. It is found primarily in the northern part of the state and the Sierra foothills, growing at elevations from 0 to 3,900 feet. The species occupies chaparral, oak woodland, and mixed evergreen forest understories, favoring well-drained, rocky or gravelly soils.
No standardized commercial extract or supplement monograph for Silene californica exists in major pharmacopeias or regulatory databases. In the context of traditional use (see Section 2), the plant has been prepared primarily as:
Roots and aerial parts of Silene californica were often prepared as decoctions or infusions to address a variety of ailments. Beyond traditional forms, the plant has received minor attention as a nutritional supplement ingredient, but no standardized dosage forms, dosage levels, or specification monographs have been published by any pharmacopeia or regulatory authority as of the most recent available literature.
Silene californica is native to the territory of numerous California indigenous nations. Historically, indigenous peoples, such as the Pomo and other Native American tribes, recognized the plant's therapeutic potential and incorporated it into their traditional medicine. Roots and aerial parts were often prepared as decoctions or infusions to address a variety of ailments, notably as a soothing remedy for digestive complaints and as a gentle cleanser for the urinary system.
An important limiting note regarding the ethnobotanical record is that the 1933 publication Miwok Material Culture by Barrett and Gifford, an authoritative source on Central California indigenous botanical knowledge, lists Silene californica Durand explicitly among plants not used by the Miwok people. The entry "Silene californica Dur." appears in the catalog of unused plants in that ethnobotanical survey. This underscores that documentation of indigenous use for this specific species is uneven across different tribal territories and ethnographic records, and that not all neighboring peoples in its range incorporated it into material culture or medicine.
More broadly across the Silene genus, species have attracted increasing scientific interest due to their long-standing traditional use for medicinal and nutritional purposes in regions such as Anatolia (Türkiye), Spain, and Italy. Several Silene species have been employed in traditional medicine to address conditions such as inflammation, bronchitis, colds, and infections, as well as for their diuretic, antipyretic, analgesic, emetic, anti-dandruff, wound-cleansing, and lice-repellent properties. However, these documented traditions predominantly pertain to Old World species of the genus rather than to Silene californica specifically.
It must be noted explicitly that the body of rigorously documented ethnobotanical data specific to Silene californica is sparse. Claims of use by the Pomo tribe for digestive and urinary complaints, and use of poultices for skin conditions, appear in some secondary sources but are not corroborated by primary ethnobotanical monographs of the same authority as the Miwok study cited above. Readers and researchers should treat any specific claimed traditional use for this species with appropriate caution unless traceable to a primary ethnobotanical record.
No primary phytochemical investigation of Silene californica specifically has been identified in the peer-reviewed literature. The phytochemical profile of this species must therefore be inferred from the extensively studied broader genus. Studies of Silene have demonstrated their richness in various compounds — over 450 compounds have been isolated — belonging to different structural types, including phytoecdysteroids, triterpene saponins, terpenoids, benzenoids, flavonoids, N-containing compounds, sterols, vitamins, and others.
Phytochemical investigations of the Silene genus have led to the isolation of a wide range of secondary metabolites, including phytoecdysteroids, triterpenoid saponins, terpenoids, flavonoids, anthocyanidins, and sterols. The following classes have been most extensively characterized across the genus:
The most prominent compounds in Silene species are the phytoecdysteroids, which have a similar chemical structure to molting hormones of insects. Important classes include phytoecdysteroids, which mimic insect molting hormones. A comprehensive review summarized the phytoecdysteroid content referring to 171 species from the genus Silene and listed 93 phytoecdysteroids isolated over the past few decades. Ecdysterone (20-hydroxyecdysone) is the principal phytoecdysteroid found in the genus and has been isolated from multiple species.
Of special interest is the presence of phytoecdysteroids, which mimic insect molting hormones and which strongly interfere with the metamorphosis of insects. In mammalian biology, phytoecdysteroids do not bind to the nuclear ecdysone receptor but are believed to interact with other signaling pathways, though the precise mechanisms in humans remain under investigation.
The abundance and widespread occurrence of triterpene saponins are typical features of the family Caryophyllaceae. Previous investigations of Silene plants led to isolation of approximately 52 triterpenoid saponins. Plants of the genus Silene have proved to be a rich source of triterpenoid saponins with an oleanane-type skeleton. Specific triterpene aglycones documented from various Silene species include oleanolic acid, betulinic acid, and ursolic acid. Compounds such as ecdysterone, apigenin, diosmetin, kaempferol, luteolin, myricetin, quercetin, isovitexin, rutin, naringin, chlorogenic acid, betulinic acid, oleanolic acid, ursolic acid, D-pinitol, and spinasterol have been identified in phytochemical investigations of Silene species.
Flavonoids are polyphenolic compounds that remain among the most extensively studied constituents of the Caryophyllaceae family. Numerous structurally diverse aglycones, including flavones, flavonols, flavanones (dihydroflavones), isoflavones, and their O- or C-glycosides, exhibit multiple interesting biological and pharmacological activities, such as antioxidant, anti-inflammatory, anti-oedemic, antimicrobial, and immunomodulatory effects.
LC-ESI-MS analysis of methanol fractions from Silene species revealed the presence of common groups including flavonoids, steroids, and triterpenoid saponins. Several bioactive compounds have been identified, including rutin, kaempferol-neohesperidoside derivative, diosmin, sileneoside, hesperidin, luteolin-di-O-glucoside, orientin-O-glucoside, vitexin-O-rhamnoside, and swertisin-O-glucoside.
The most important classes of phytochemicals include saponins, phytoecdysteroids, other sterols, flavonoids, lignans, other polyphenols, essential oils, and N-containing compounds such as vitamins, alkaloids, and cyclopeptides. Phytochemical investigations of the genus Silene have also led to the isolation of benzenoids, anthocyanins, and N-containing compounds.
Critical caveat: None of the compound profiles described above have been specifically confirmed for Silene californica through direct phytochemical analysis in the primary literature available at the time of writing. They represent a genus-level inference applicable across the broader Silene genus, which includes over 700 species with varying chemotype profiles. The actual phytochemical composition of this specific species may differ substantially.
Phytochemical investigations of the Silene genus have led to the isolation of a wide range of secondary metabolites, and these compounds contribute to the diverse biological activities exhibited by the genus, such as antimicrobial, antifungal, antiviral, antioxidant, antitumor, immunomodulatory, adaptogenic, and actoprotective effects.
Also, Silene species have antiviral, antimicrobial, antioxidant, cytotoxic, hepatoprotective, and insecticidal activity. These activities have been documented in laboratory (in vitro) and, in some cases, animal (in vivo) models for various other species within the genus, but they have not been demonstrated directly for Silene californica.
Triterpenoid saponins and certain flavonoids isolated from Silene species have demonstrated antimicrobial potential in laboratory studies. Crude ethanolic extract of Silene rubella exhibited antimicrobial activity against Escherichia coli with IC50 48.85 μg/mL. Oleanolic acid exhibited good activity against E. coli with IC50 15.78 μg/mL; oleanolic acid and betulinic acid exhibited potent antibacterial activity against Vancomycin-resistant Enterococcus (VRE), with IC50 values of 6.36 and 7.51 µg/mL, respectively. These results are from studies on a different species (S. rubella) and do not directly apply to Silene californica.
Silene species are known for their richness in triterpenoids saponins, flavonoids, and phytoecdysteroids. Flavonoids are well-established antioxidant agents in the broader botanical literature, and genus-level reviews note antioxidant activity as a common biological property of Silene extracts. However, no specific antioxidant assays performed on Silene californica extracts have been identified in the primary literature.
Numerous structurally diverse flavonoid aglycones and their glycosides exhibit antioxidant, anti-inflammatory, anti-oedemic, antimicrobial, and immunomodulatory effects. These mechanisms are attributed at a molecular level to inhibition of pro-inflammatory enzymes (e.g., cyclooxygenase, lipoxygenase) and cytokines. Whether any such activity is expressed by extracts of Silene californica specifically has not been examined in published research.
More than 400 compounds have been isolated from Silene, among them phytoecdysteroids are the major class. The literature reviews the biological (antitumor, antibacterial, and antioxidant) activities and the phytoecdysteroids of the genus. Phytoecdysteroids such as 20-hydroxyecdysone have attracted significant scientific interest for potential adaptogenic, anabolic, and metabolic effects in mammalian systems, although the evidence base for these human effects remains preliminary and primarily derived from animal models.
A thorough search of the primary peer-reviewed literature reveals that no published clinical trials, randomized controlled trials, human observational studies, animal in vivo studies, or even primary in vitro pharmacological studies have been conducted specifically on Silene californica. The species is absent from the NIH PubMed database as a subject of pharmacological or clinical investigation. It is not covered by any WHO monograph, ESCOP monograph, German Commission E monograph, EFSA opinion, or other regulatory health agency assessment.
The sections below therefore describe what the broader genus-level literature supports, clearly distinguished from any claims specific to Silene californica.
Traditional use of Silene californica for digestive complaints has been cited in some secondary sources. The plant was notably used as a soothing remedy for digestive complaints. No clinical or preclinical study has investigated gastrointestinal effects of Silene californica specifically. Evidence strength: Traditional claim only; no scientific evidence.
Secondary sources attribute diuretic or urinary cleansing properties to the plant. Several Silene species have been employed in traditional medicine for their diuretic properties. However, these accounts refer to Old World species, primarily in Mediterranean and Anatolian traditions, not to Silene californica. Evidence strength: Genus-level traditional claim; no species-specific scientific evidence.
Several Silene species have been employed in traditional medicine for wound-cleansing properties. For Silene californica specifically, poultice application to skin irritations is cited in some secondary sources, but this has not been confirmed by any controlled study. Evidence strength: Anecdotal/secondary traditional claim; no scientific evidence.
Silene species have attracted increasing scientific interest due to their long-standing traditional use, and several have been employed in traditional medicine to address conditions such as inflammation, bronchitis, colds, and infections. At the genus level, laboratory studies have demonstrated antimicrobial activity for extracts and isolated compounds from several other species. Evidence strength for S. californica: No species-specific evidence; genus-level in vitro data only.
Compounds from the Silene genus contribute to diverse biological activities, including antimicrobial, antifungal, antiviral, antioxidant, antitumor, immunomodulatory, adaptogenic, and actoprotective effects. These conclusions derive from studies of other species and isolated compounds. Evidence strength for S. californica: No species-specific evidence; genus-level compound-class extrapolation only.
Based on the documented genus-level pharmacological literature, the following body systems and health areas have been studied in the context of Silene species generally. None of these associations has been confirmed specifically for Silene californica through clinical or preclinical research.
No peer-reviewed clinical study, pharmacopoeial monograph, or authoritative dietary supplement database has established or reported a specific dosage for Silene californica in human use. No clinical trials have been conducted from which dosage levels could be cited.
In traditional practice, the plant was used as decoctions and infusions of roots and aerial parts, but no quantitative dosage data have been recorded in verifiable primary ethnobotanical sources reviewed here. Any dosage information found on commercial supplement labeling for this ingredient lacks the backing of peer-reviewed clinical investigation.
No formal toxicological studies — including acute toxicity, subchronic toxicity, genotoxicity, reproductive toxicity, or carcinogenicity assessments — have been published for Silene californica in the peer-reviewed literature. The species is absent from major regulatory safety databases.
Triterpenoid saponins, which are characteristic of the broader Silene genus, are known to have detergent-like properties. Important compound classes in Silene include triterpene saponins with detergent properties. High concentrations of saponins can cause gastrointestinal irritation and are hemolytic in vitro; however, whether Silene californica contains such saponins at pharmacologically relevant concentrations has not been established by primary research.
Silene californica does not appear on the FDA's Generally Recognized As Safe (GRAS) list, has not been evaluated by the European Food Safety Authority (EFSA), and has not received a positive assessment from any major regulatory health authority. The German Commission E, ESCOP, and WHO have not issued monographs for this species.
The plant is morphologically similar to several related California Silene species. For example, Silene serpentinicola has been confused with S. californica. These species differ: Silene serpentinicola produces carmine-red flowers while S. californica has red-scarlet flowers; S. hookeri subsp. pulverulenta has pink-white flowers. Misidentification of closely related species is a recognized risk in wild-harvested botanical ingredients.
No drug or supplement interaction data have been published for Silene californica. Given the complete absence of clinical pharmacokinetic or pharmacodynamic data, no evidence-based assessment of interactions is possible.
Safety in pregnancy, lactation, pediatric populations, and individuals with chronic disease has not been studied. No safety data exist to support use in any of these groups.
Silene californica is a native Californian herb with a limited and not universally corroborated record of traditional medicinal use among some indigenous California peoples. The broader genus Silene is one of the most phytochemically rich in the family Caryophyllaceae, producing a high diversity of secondary metabolites, many of which show interesting biological and pharmacological activities; more than 450 compounds have been isolated from the genus, with important classes including phytoecdysteroids, triterpene saponins, volatiles, other terpenoids, and phenolics. However, the genus-level science does not constitute evidence for the specific species. No human clinical data, no controlled animal experiments, and no primary phytochemical characterization has been published for Silene californica itself. The species has no pharmacopoeial monograph and no formal safety assessment from any regulatory body. Any claims regarding its effects in the human body remain unverified by peer-reviewed science and should be understood as either traditional use claims or extrapolations from distantly related species within the same genus.
Health conditions that Silene californica may help support.
Body systems that Silene californica may help support.
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