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Nolina brittoniana est une espèce végétale de la famille des Asparagaceae. Cette plante pousse dans le centre de la Floride, aux États-Unis, sur sol sablonneux. Elle est considérée comme une espèce en danger par United States Fish and Wildlife Service
, Nolina brittoniana is a rare species of fl … Nolina brittoniana is a rare species of flowering plant in the asparagus family known by the common name Britton's beargrass. It is endemic to Florida, where there are 72 known populations, only a few of which are large enough to be considered viable. It is federally listed as an endangered species of the United States. This plant has no aboveground stem. It is a rosette of leaves attached at a bulblike base which arises from an underground caudex, a modified stem. The grasslike leaves are up to a meter long and rarely more than a centimeter wide. The edges are serrated with cartilaginous teeth. The inflorescence is a large, erect panicle up to a meter tall. It has small bracts and reduced leaves. The many small flowers have tepals measuring only 1 or 2 millimeters long. While the flowers are bisexual, they are functionally unisexual, with either the male or female part reduced and not functional. Most plants have either functionally male or female flowers, but some have both. Blooming occurs in March through May. The flowers give rise to winged capsules roughly a centimeter long by a centimeter wide. The plant reproduces sexually via seed and vegetatively by cloning. The plant is limited to seven counties in Central Florida, where it grows in a number of habitat types. It is known from various kinds of Florida scrub habitat, hammocks, and sandhills. The habitat types are different in many ways but they all have dry, well-drained, low-nutrient sandy soils and they are all maintained by wildfire. The plant is present on Lake Wales Ridge, home to many rare Central Florida endemic plants. It grows alongside Polygala lewtonii, Polygonum dentoceras, Polygonum basiramia, Paronychia chartacea subsp. chartacea, , Liatris ohlingerae, Hypericum cumulicola, Conradina brevifolia, Calamintha ashei, and Bonamia grandiflora. The plant is relatively widespread when compared with other rare local plants, but most of the populations are small and some are made up of only female individuals. The beargrass is a member of plant communities that are maintained by a natural fire regime. Periodic wildfire halts the encroachment of large and woody vegetation, preventing ecological succession and keeping the canopy thin to allow sunlight to the herb layer below. These fire-maintained habitat types in Florida are largely degraded now because of a long-standing policy of fire suppression. They are overgrown, with thick canopies and a large amount of flammable organic buildup. Without fire, the beargrass does not grow well, its reproduction is inefficient, and its populations experience low recruitment. The beargrass flowers most profusely in the year following a fire. Many populations are located on privately owned land, and it is up to the landowner to decide whether or not to initiate controlled burns. Habitat is also being lost to development and to agricultural operations, particularly citrus groves. Habitat fragmentation has occurred. However, the species likely always been sparse in widespread populations, even before human interference in the habitat, and conservation of remaining habitat fragments will probably be enough to maintain it. Prescribed burns should be part of this conservation plan. While it is rare in the wild, the beargrass is cultivated in plant nurseries.eargrass is cultivated in plant nurseries.
, Nolina brittoniana ist eine Pflanzenart der Gattung Nolina in der Familie der Spargelgewächse (Asparagaceae). Ein englischer Trivialname ist „Britton’s Beargrass“. Das Epitheton der Art ehrt den US-amerikanischen Botaniker Nathaniel Lord Britton.
, Nolina brittoniana är en sparrisväxtart som beskrevs av . Nolina brittoniana ingår i släktet Nolina och familjen sparrisväxter. Artens utbredningsområde är Florida. Inga underarter finns listade i Catalogue of Life.
, Nolina brittoniana es una especie de planta con rizoma perteneciente a la familia de las asparagáceas. Es originaria de Norteamérica.
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Nolina brittoniana ist eine Pflanzenart der Gattung Nolina in der Familie der Spargelgewächse (Asparagaceae). Ein englischer Trivialname ist „Britton’s Beargrass“. Das Epitheton der Art ehrt den US-amerikanischen Botaniker Nathaniel Lord Britton.
, Nolina brittoniana är en sparrisväxtart som beskrevs av . Nolina brittoniana ingår i släktet Nolina och familjen sparrisväxter. Artens utbredningsområde är Florida. Inga underarter finns listade i Catalogue of Life.
, Nolina brittoniana is a rare species of fl … Nolina brittoniana is a rare species of flowering plant in the asparagus family known by the common name Britton's beargrass. It is endemic to Florida, where there are 72 known populations, only a few of which are large enough to be considered viable. It is federally listed as an endangered species of the United States. While it is rare in the wild, the beargrass is cultivated in plant nurseries.eargrass is cultivated in plant nurseries.
, Nolina brittoniana es una especie de planta con rizoma perteneciente a la familia de las asparagáceas. Es originaria de Norteamérica.
, Nolina brittoniana est une espèce végétale de la famille des Asparagaceae. Cette plante pousse dans le centre de la Floride, aux États-Unis, sur sol sablonneux. Elle est considérée comme une espèce en danger par United States Fish and Wildlife Service
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Nolina brittoniana
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