Vicia acutifolia
Vicia acutifolia, commonly known as fourleaf vetch or sand vetch, is a species of flowering plant in the family Fabaceae. It is native to the southeastern United States and the northern Bahamas.
Description
Vicia acutifolia is a perennial herb in the genus Vicia. It produces pinnately compound leaves with multiple pairs of leaflets and bears racemose inflorescences of papilionaceous flowers. The fruit is a legume. Within its range, it is distinguished from similar species such as Vicia floridana by its larger flowers and longer legumes.
Taxonomy
The species was described by Stephen Elliott in 1823 in A Sketch of the Botany of South-Carolina and Georgia (volume 2, page 225). It is widely recognized as a distinct species in modern floristic treatments.
The species has also been placed in the genera Cracca and Ervum as Cracca acutifolia and Ervum acutifolium, respectively, though these treatments are not widely adopted. Another synonym, Vicia lutescens, has been used in some classifications.
Distribution and habitat
Vicia acutifolia occurs from southeastern South Carolina south through Florida and west to the eastern Florida Panhandle, with additional occurrences in the northern Bahamas. In Florida, it has been documented from numerous counties based on vouchered herbarium specimens.
It inhabits moist environments, including pond margins, pine flatwoods, hammocks, wet woodlands, and roadside ditches.
Occurrence data compiled by the Global Biodiversity Information Facility (GBIF) indicate thousands of records across its range, including herbarium specimens and research-grade observations, reflecting its relative abundance.
Phenology
Flowering occurs from April to June.
Ecology
Vicia acutifolia is associated with moist soils and is considered a facultative wetland species (FACW) in the Atlantic and Gulf Coastal Plain, indicating that it usually occurs in wetlands but may also be found in non-wetland habitats.
Conservation
Vicia acutifolia has a NatureServe global conservation rank of G4G5, indicating that it is considered apparently secure to secure across its range, although the status has not been recently reviewed. The species is reported to be frequent and abundant in parts of its range, particularly in Florida, Georgia, and South Carolina.
Although it occurs in a variety of moist habitats and is not currently considered at high risk, continued monitoring is recommended due to uncertainty in long-term population trends.