Nolina brittoniana is a federally endangered beargrass — one of the rarest plants in the state of Florida, restricted to 72 known populations (many of them tiny) in seven counties of central Florida. It is an acaulescent species of scrub, sandhills and xeric hammocks, dependent on wildfire for habitat maintenance and facing severe threats from urbanisation, agricultural conversion and fire suppression. This is not a garden plant in any practical sense — it is included here for its conservation significance, which is considerable.
Taxonomy and nomenclature
Described by Nash. Family Asparagaceae, subfamily Nolinoideae. Legal status: US Endangered (federal), FL Endangered (state). FNAI ranks: G3/S3. The species is protected from harvesting and commercial trade, and transplanting requires permits.
Common names
Britton’s beargrass (English).
Morphological description
Habit
A perennial herb growing from a short, thick, fleshy, bulb-like rootstock arising from an underground caudex. No above-ground stem. Leaves form a rosette with the youngest upright and the oldest lying nearly flat — a distinctive posture.
Leaves
Grass-like, stiff, 90–180 cm (3–6 ft) long and 3–12 mm wide (wider than the closely related Nolina atopocarpa). Green (not glaucous). Margins serrate with close-set, tough, cartilaginous teeth.
Inflorescence and flowering
A single flowering stem grows at least 1.8 m (6 ft) tall in April, producing a panicle with about six branches covered in small white flowers. The species is very conspicuous when in bloom. Functionally unisexual (despite having bisexual flower parts): individual plants are functionally male or female. Fruit is a symmetrical capsule, triangular in cross-section, 8–12 mm in diameter. Seeds are abundant and easily germinated.
Distribution and natural habitat
Endemic to seven counties in central Florida. Habitat types include Florida scrub, sandhills, scrubby flatwoods and xeric hammocks — all characterised by dry, well-drained, low-nutrient sandy soils maintained by wildfire. A significant population occurs on the Lake Wales Ridge, a hotspot for central Florida endemic plants. The species grows alongside other endangered Florida scrub endemics: Polygala lewtonii, Liatris ohlingerae, Hypericum cumulicola, Conradina brevifolia and others.
Conservation
The threats facing Nolina brittoniana are severe and ongoing:
- Habitat loss: conversion of high pine and scrub communities to agricultural and residential land use.
- Fire suppression: the species depends on periodic fire to maintain its open habitat. Without fire, woody plants overgrow and shade out the beargrass.
- Small populations: most of the 72 known populations are small, and some consist entirely of female individuals, making reproduction impossible.
- Low genetic diversity: clonal reproduction means that many “populations” may represent a single genetic individual.
- Catastrophic risk: small, isolated populations are vulnerable to hurricanes and severe wildfires.
Conservation actions include land acquisition on the Lake Wales Ridge by the State of Florida and the US Fish and Wildlife Service. Research at Archbold Biological Station has documented the pollinator community (principally Hymenoptera) and population genetics.
Distinction from Nolina atopocarpa
Nolina atopocarpa (Florida beargrass) is a related rare species also endemic to Florida. It differs from Nolina brittoniana in having narrower leaves (1.5–4 mm wide vs 3–12 mm), shorter leaves, and strongly asymmetrical capsules. Both species are listed as endangered or threatened in Florida.
References
POWO (2026). Nolina brittoniana. Plants of the World Online, Kew.
US Fish and Wildlife Service: Nolina brittoniana species profile.
Florida Natural Areas Inventory: Nolina brittoniana field guide.