Eriogonum longifolium var. gnaphalifolium
|Scrub Buckwheat, Scrub Wild Buckwheat|
The following Participating Institutions are custodians for this species in the CPC National Collection:
Cincinnati Zoo & Botanical Garden
Bok Tower Gardens
The conservation of Eriogonum longifolium var. gnaphalifolium is fully sponsored.
Cindy Campbell contributed to this Plant Profile.
Eriogonum longifolium var. gnaphalifolium has a stem (up to 1 meter) that grows from a deep, stout, woody taproot. A rosette is formed by the basal leaves and the stem terminates in a flowering panicle The leaves are alternate with the blades relatively narrow. They are green above and densely white beneath. The inflorescence consists of minute bracts, narrow sepals, and is involute with glabrous filaments (Small, 1933). The involucre and flowers are silvery, silky-pubescent. E. tomentosum is the only other related species located in Florida and the two species can be found in the same sites. The former has leafy bracts in its inflorescences, and its cauline leaves are opposite making it quite distinctive from E. longifolium var. gnaphalifolium (Ward 1979, Wunderlin 1982, and U.S. Fish and Wildlife Service 1993).
Distribution & Occurrence
Sandhill, oak-hickory scrub on yellow sands, high pineland between scrub and sandhill, turkey oak barrens (FNAI 2000) with no or shallow litter cover (Menges and Quintana-Ascencio 2002).
|The Florida Natural Areas Inventorys database currently contains 83 occurrence records. Many are located in the Ocala National Forest.|
Conservation, Ecology & Research
Most flowering occurs within the first year following a fire but can occur from January to November. A plant typically flowers for a period of two to three months but the individual flowers are short-lived and open asynchronously (NatureServe). The flowers are pollinated by several types of solitary digger and twig-nesting wasps (Parancistrocerus spp. and Stenodynerus spp.), flies (Geron spp.), small solitary bees, and occasional social wasps.
Inadequate or wrongly-timed fire.
Use of herbicides in forestry or road right-of-way maintenance
Invasive species s
Effects of different fire frequencies on population demography (Archbold Biological Station)
Seed Germination (Archbold Biological Station, Bok Tower Gardens)
Transplantation (Bok Tower Gardens)
Determine optimal fire frequency
Long-term monitoring of additional representative populations is needed to quantify population trends and responses to management procedures (e.g. burning, timber management)
Determine the genetic variability among and within the populations
Conduct demographic studies to determine population stability, increase, and decline
Seed and reproductive biology should be studied in more detail
Determine current distribution of E. longifolium var. gnaphalifolium
Collect seeds periodically from native populations to establish populations for study and as seed sources for reintroductions
Accession and store seed with the National Seed Storage Lab
Develop optimal propagation protocols for both seed and vegetative reproduction
Small, J.K. 1933. Manual of the southeastern flora. Chapel Hill. University of North Carolina Press.
Ward, D. 1979. Rare and endangered biota of Florida, vol. 5: Plants. Gainesville. University Presses of Florida.
Wunderlin, R. 1982. Guide to the vascular plants of Central Florida. Gainesville. University Presses of Florida.