Cirsium andrewsii is an uncommon species of thistle known by the common name Franciscan thistle. It is endemic to California, where it is known from the coastline of the San Francisco Bay Area from Marin to San Mateo Counties.[3] There are also reports of isolated populations in the Klamath Mountains and in the Sierra Nevada.[4]
Cirsium andrewsii grows in coastal habitats such as sea bluffs and canyons, and is sometimes found on serpentine soils. The species is biennial to perennial, producing an erect, leafy stem which can reach two meters in height. It is highly branched, dense to clumpy, fleshy, and cobwebby with fibers, especially when new. The leaves are woolly or cobwebby, spiny along the edges, and sometimes lack lobes or deep cuts. They are borne on petioles with winged, spiny margins, some spines exceeding a centimeter in length. The inflorescence produces one or more flower heads, each up to 3 centimeters long by 5 wide, wispy with cobwebby fibers, and lined with very spiny phyllaries. The flower head is packed with dark purplish-pink flowers up to about 2.5 centimeters in length. The fruit is an achene with a dark brown body about half a centimeter long and a pappus about 1.5 centimeters long.[3]
Cirsium andrewsii is an uncommon species of thistle known by the common name Franciscan thistle. It is endemic to California, where it is known from the coastline of the San Francisco Bay Area from Marin to San Mateo Counties. There are also reports of isolated populations in the Klamath Mountains and in the Sierra Nevada.
Cirsium andrewsii grows in coastal habitats such as sea bluffs and canyons, and is sometimes found on serpentine soils. The species is biennial to perennial, producing an erect, leafy stem which can reach two meters in height. It is highly branched, dense to clumpy, fleshy, and cobwebby with fibers, especially when new. The leaves are woolly or cobwebby, spiny along the edges, and sometimes lack lobes or deep cuts. They are borne on petioles with winged, spiny margins, some spines exceeding a centimeter in length. The inflorescence produces one or more flower heads, each up to 3 centimeters long by 5 wide, wispy with cobwebby fibers, and lined with very spiny phyllaries. The flower head is packed with dark purplish-pink flowers up to about 2.5 centimeters in length. The fruit is an achene with a dark brown body about half a centimeter long and a pappus about 1.5 centimeters long.
Cirsium andrewsii, es una especie fanerógama perteneciente a la familia de las asteráceas. Es endémica de California.
Este cardo es bienal a perenne, con un tallo erecto, y hojas que pueden alcanzar los dos metros de altura. Está muy ramificado, denso y carnoso grumoso, y con fibras como telarañas, especialmente cuando es nuevo. Las hojas son lanosas o de telarañas, con espinas en los bordes, y a veces carecen de lóbulos o cortes profundos. Nacen en pecíolos alados, con márgenes espinosos, algunas espinas que excedan de un centímetro de largo. La inflorescencia produce una o más cabezas de flores, cada una de hasta 3 centímetros de largo por 5 de ancho, tenue con fibras de telarañas, y se alinean con brácteas muy espinosas. La cabeza de la flor es de color morado oscuro, las flores de color rosa de 2,5 centímetros de longitud. El fruto es un aquenio con un cuerpo de color marrón oscuro con alrededor de medio centímetro de largo y un mechón de aproximadamente 1,5 centímetros de largo.
Se encuentra en California, donde se le conoce sólo en la línea de costa de la Bahía de San Francisco en los condados de Marín y de San Mateo.[1] Crece en hábitats costeros, tales como acantilados marinos y cañones, y en ocasiones se encuentra en suelos de serpentina.
Cirsium andrewsii fue descrita por (A.Gray) Petr. y publicado en A Flora of Western Middle California 506. 1901.[2]
Cirsium: nombre genérico que deriva de la palabra griega: kirsos = varices ; de esta raíz deriva el nombre kirsion, una palabra que parece servir para identificar una planta que se utiliza para el tratamiento de este tipo de enfermedad. De kirsion, en los tiempos modernos, el botánico francés Tournefort (1656 - 708) ha derivado el nombre Cirsium del género.
andrewsii: epíteto otorgado en honor del naturista Timothy Langdon Andrews (1819-1908)
Cirsium andrewsii, es una especie fanerógama perteneciente a la familia de las asteráceas. Es endémica de California.
Cirsium andrewsii là một loài thực vật có hoa trong họ Cúc. Loài này được (A.Gray) Jeps. mô tả khoa học đầu tiên năm 1901.[1]
Cirsium andrewsii là một loài thực vật có hoa trong họ Cúc. Loài này được (A.Gray) Jeps. mô tả khoa học đầu tiên năm 1901.
