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Blepharizonia is a genus of flowering plants in the family Asteraceae.[3] There are two species, both endemic to California.[4] They are known generally as big tarweeds.[5][6]
The genus long included only the single species B. plumosa, which was divided into two subspecies. Studies of the plant indicated that the subspecies had low interfertility, rarely interbreeding when growing together.[6] They were also evolutionarily divergent[6] and had significant morphological and ecological distinctions.[7] One of the subspecies was elevated to species status and is now usually treated as B. laxa.[7]
These are annual herbs varying in height from 10 centimeters (4 inches) to over 1.8 meters (6 feet). They are strongly scented. The leaves are oppositely arranged near the base of the stem, and alternately arranged along most of the plant. They are linear, lance-shaped, or narrowly spatula-shaped, and sometimes toothed. The herbage is hairy to bristly and often glandular. The flower heads are often borne in wide arrays or spikelike inflorescences; B. laxa may have solitary heads. The hairy, glandular phyllaries grow close to the ray florets and can remain attached to the fruits they bear. The deeply lobed ray florets are usually whitish, often with red or purple nerves along the undersides. They are up to a centimeter long or longer. There are few to many whitish or purplish disc florets with purple anthers. The fruit is a ribbed cypsela, sometimes with a pappus of scales.[4][5]
Blepharizonia is a genus of flowering plants in the family Asteraceae. There are two species, both endemic to California. They are known generally as big tarweeds.
The genus long included only the single species B. plumosa, which was divided into two subspecies. Studies of the plant indicated that the subspecies had low interfertility, rarely interbreeding when growing together. They were also evolutionarily divergent and had significant morphological and ecological distinctions. One of the subspecies was elevated to species status and is now usually treated as B. laxa.
Blepharizonia, es un género de plantas con flores perteneciente a la familia Asteraceae. Comprende 2 especies descritas y aceptadas.[1][2]
El género fue descrito por (A.Gray) Greene y publicado en Bulletin of the California Academy of Sciences 1(4D): 279. 1885.[3] La especie tipo es: Blepharizonia plumosa (Kellogg) Greene
Blepharizonia: nombre genérico que proviene de las palabras griegas blepharis = "pestañas" y zona = "cinturón o anillo", tal vez en alusión a los anillos de escamas ciliadas del vilano, o de los nombres genéricos Blepharipappus y Hemizonia, aludiendo a la semejanza entre ellos.[4]
A continuación se brinda un listado de las especies del género Blepharizonia aceptadas hasta julio de 2012, ordenadas alfabéticamente. Para cada una se indica el nombre binomial seguido del autor, abreviado según las convenciones y usos.
Blepharizonia, es un género de plantas con flores perteneciente a la familia Asteraceae. Comprende 2 especies descritas y aceptadas.
Blepharizonia é um género botânico pertencente à família Asteraceae.[1]
Blepharizonia é um género botânico pertencente à família Asteraceae.
Blepharizonia là một chi thực vật có hoa trong họ Cúc (Asteraceae).[1]
Chi Blepharizonia gồm các loài:
Blepharizonia là một chi thực vật có hoa trong họ Cúc (Asteraceae).
