Grindelia fraxinipratensis, common name Ash Meadows gumweed,[3] is a North American species of flowering plants in the family Asteraceae. It is native to the southwestern United States, in Mojave Desert regions in Nye County in Nevada and Inyo County in California. Some of the Nevada populations (including the type locality) lie inside the Nevada Test Site of the United States Atomic Energy Commission[4][5]
Some sources spell the name as G. fraxino-pratensis. Grindelia fraxinipratensis is the accepted spelling according to the International Code of Nomenclature.[6]
Grindelia fraxinipratensis grows in meadows and on the borders of woodlands. It is a biennial or perennial herb growing 50–120 cm (19.5–47 in) tall, erect in form, brown or reddish, and hairless and oily. It grows from a thick underground caudex atop a woody taproot. The dark green leaves are up to 7 centimeters (2.8 inches) long, widely lance-shaped or oblong, sometimes toothed near the tips, and studded with visible resin glands. The inflorescence bears one to four flower heads lined with thick phyllaries. The head contains about 15 yellow disc florets surrounded by about 13 yellow ray florets each about 4 millimeters (0.16 inches) long. The fruit is an achene with a pappus made up of two awns.[7]
Grindelia fraxinipratensis is native to the Amargosa Valley along the southern part of the border between California and Nevada, where it is known from only 14 to 16 locations.[8] Many are found within the Ash Meadows National Wildlife Refuge in the Amargosa Desert area.
The plant grows in the clay, saline and alkaline soils of the land surrounding desert warm springs in the valley. Its main habitat type is the saltgrass meadow (Distichlis spicata). It is relatively abundant in the moist areas of its habitat, and rare in the drier areas.[9]
Grindelia fraxinipratensisis a federally listed threatened species. Habitat in the area was first altered when peat mining was started and Carson Slough, a large local wetland, was drained.[10] The area was then farmed. Large scale farming by corporate agriculture altered much of the Ash Meadows habitat. Today a main threat to the species is the lowering of the water table, which may move water supplies too deep into the soil for the plant to reach with its roots.[9][10] Other threats include trampling by feral horses and cattle, off-road vehicle use, and non-native plant species.[11]
Grindelia fraxinipratensis, common name Ash Meadows gumweed, is a North American species of flowering plants in the family Asteraceae. It is native to the southwestern United States, in Mojave Desert regions in Nye County in Nevada and Inyo County in California. Some of the Nevada populations (including the type locality) lie inside the Nevada Test Site of the United States Atomic Energy Commission
Some sources spell the name as G. fraxino-pratensis. Grindelia fraxinipratensis is the accepted spelling according to the International Code of Nomenclature.
Grindelia fraxinipratensis grows in meadows and on the borders of woodlands. It is a biennial or perennial herb growing 50–120 cm (19.5–47 in) tall, erect in form, brown or reddish, and hairless and oily. It grows from a thick underground caudex atop a woody taproot. The dark green leaves are up to 7 centimeters (2.8 inches) long, widely lance-shaped or oblong, sometimes toothed near the tips, and studded with visible resin glands. The inflorescence bears one to four flower heads lined with thick phyllaries. The head contains about 15 yellow disc florets surrounded by about 13 yellow ray florets each about 4 millimeters (0.16 inches) long. The fruit is an achene with a pappus made up of two awns.
Grindelia fraxinipratensis is native to the Amargosa Valley along the southern part of the border between California and Nevada, where it is known from only 14 to 16 locations. Many are found within the Ash Meadows National Wildlife Refuge in the Amargosa Desert area.
The plant grows in the clay, saline and alkaline soils of the land surrounding desert warm springs in the valley. Its main habitat type is the saltgrass meadow (Distichlis spicata). It is relatively abundant in the moist areas of its habitat, and rare in the drier areas.
Grindelia fraxinipratensisis a federally listed threatened species. Habitat in the area was first altered when peat mining was started and Carson Slough, a large local wetland, was drained. The area was then farmed. Large scale farming by corporate agriculture altered much of the Ash Meadows habitat. Today a main threat to the species is the lowering of the water table, which may move water supplies too deep into the soil for the plant to reach with its roots. Other threats include trampling by feral horses and cattle, off-road vehicle use, and non-native plant species.
Grindelia fraxinipratensis[1] es una especie de planta fanerógama de la familia Asteraceae.
Es endémica del valle Amargosa a lo largo de la parte sur de la frontera entre California y Nevada, donde se conoce de sólo 14 a 16 apariciones.[2] Muchas se encuentran dentro de la Refugio Nacional de Vida Silvestre de Ash Meadows en el área del desierto de Amargosa.
La planta crece en los suelos arcillosos, salinos y alcalinos de las tierras circundantes del desierto, en los cálidos manantiales del valle. Su principal tipo de hábitat es la pradera de grama salina (Distichlis spicata). Es relativamente abundante en las zonas húmedas de su hábitat, y poco frecuente en las zonas más secas.[3]
Grindelia fraxino-pratensis es una hierba bienal o perenne que alcanza un tamaño de hasta 1,2 metros de altura, erguido en la forma, de color marrón o de color rojizo, y sin pelo y aceitosa en la textura. Crece de un grueso caudex encima de una leñosa raíz principal. Las hojas de un color verde oscuro son de hasta 7 centímetros de largo, ampliamente lanceoladas u oblongas, a veces dentadas cerca de las puntas, y salpicado de glándulas de resina visibles. La inflorescencia tiene entre una ycuatro cabezas de flores llenas de gruesos filarios. La cabeza contiene cerca de 15 florecillas amarillas en el disco rodeadas por cerca de 13 flores liguladas amarillas cada una de aproximadamente 4 milímetros de largo. El fruto es un aquenio con un vilano formado por dos aristas.
Esta es una lista federal de especies amenazadas. El hábitat en la zona se vio alterada por primera vez cuando se inició la minería de turba en Carson Slough, un gran humedal se drenó.[4] La zona fue luego cultivada. La agricultura realizada a gran escala por la agricultura corporativa ha alterado gran parte del hábitat.[1] Hoy en día una amenaza principal para la especie es la disminución de la capa freática, que puede mover los suministros de agua demasiado profundamente en el suelo para que la planta pueda llegar con sus raíces.[1][3][4] Otras amenazas son el pisoteo por los caballos salvajes y el ganado, el uso de los todoterrenos, y las especies de plantas no nativas .
Grindelia fraxinipratensis fue descrita por Reveal & Beatley y publicado en Bulletin of the Torrey Botanical Club 98(6): 334–335. 1971[1972].[5][6]
Grindelia fraxinipratensis es una especie de planta fanerógama de la familia Asteraceae.
Grindelia fraxinipratensis là một loài thực vật có hoa trong họ Cúc. Loài này được Reveal & Beatley mô tả khoa học đầu tiên năm 1972.[1]
Grindelia fraxinipratensis là một loài thực vật có hoa trong họ Cúc. Loài này được Reveal & Beatley mô tả khoa học đầu tiên năm 1972.
