Abronia umbellata

Overview

Pink sand-verbena is a perennial creeping herb of Pacific-coast beaches and dunes. [S2, S4]

Names and classification

The accepted name is Abronia umbellata Lam.; the cited salinity material is mainly from North American Pacific-coast beach populations, without a stated infraspecific taxon. [S1, S2, S4]

Both eHALOPH and COSEWIC classify the species as a perennial herb; COSEWIC’s assessment focuses on Canadian upper-tide populations. [S2, S4]

Morphology and identification

A perennial creeping herb of sandy habitats, with stems close to the ground, pink to purple-pink flowers in clustered heads, and winged fruit. [S2, S4]

Distribution, habitat and phenology

Canadian populations occur on upper-tide beaches; COSEWIC reports that local plants often fail to persist through winter and can be removed by high tides and winter storms. [S2, S4]

The cited sources do not provide a consistent, reliable flowering or fruiting season.

Salinity in natural habitats

Beach and dune habitats place the species in a coastal setting, but the cited sources report no root-zone salinity measurements for it. [S2, S4]

Salinity studies

The salinity-related experiments for this species measured fruit dispersal and flotation; they did not apply NaCl to plants or measure sustained plant growth.

Reported mechanisms and ecological adaptations

Available studies focus on beach life history, fruit dispersal, and storm disturbance; they do not report salt-ion regulation or antioxidant mechanisms in this species. [S2, S3, S4]

Conclusions and evidence gaps

Darling et al. compared filled anthocarps from 34 populations across the range. Wing index was higher at both northern and southern range margins, and more strongly winged fruits moved at lower wind speeds in the tunnel; wings did not improve flotation in artificial seawater. [S1, S2, S3, S4]