A. Gray
Identity
Unique IDELEMENT_GLOBAL.2.1219117
Element CodePDCAR0U2L0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderCaryophyllales
FamilyCaryophyllaceae
GenusSilene
SynonymsSilene hookeri ssp. bolanderi(Gray) Abrams
Concept ReferenceMesler, M.R., M.S. Mayer, and S.K. Carothers. 2019. Silene nelsonii, a new large-flowered species from the Trinity River area of northwestern California, USA, and a re-evaluation of S. bolanderi Gray. Madroño 66(4); 176-193.
Taxonomic CommentsThis is the record for the concept of Silene bolanderi following Mesler et al. (2019) who recognize S. nelsonii as a distinct species. "Silene nelsonii differs from S. bolanderi by its more deeply lobed, white petals; lack of well-developed coronal petal appendages; densely ciliate petal bases; and shorter, sometimes branched sepal hairs" (Mesler et al. 2019).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2021-10-27
Change Date2021-10-27
Edition Date2021-11-05
Edition AuthorsTomaino, A. (2021)
Threat ImpactHigh
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences6 - 80
Rank ReasonsSilene bolanderi is known from northern California and Josephine County, Oregon. Threats include ungulate grazing and trampling, road work, and conversion of habitat for high-value agriculture.
Range Extent CommentsSilene bolanderi is known from northern California (from Mendocino to southern Humboldt and Trinity counties), and a cluster of disjunct populations in the northwestern corner of Josephine County, Oregon (Mesler et al. 2019).
Occurrences Comments"The number of extant California occurrences is uncertain, but likely quite small; we can confirm only sixteen" (Mesler et al. 2019). In Oregon, there is a cluster of populations in one area (Mesler et al. 2021).
Threat Impact CommentsSilene bolanderi is threatened by ungulate grazing and trampling, road work, and conversion of habitat for high-value agriculture (Mesler et al. 2019). The percentage of occurrences threatened is estimated to be 20-80% (Mesler et al. 2019). Other threats include invasive plants, and logging (NatureServe 2021).