Myriopteris covillei, formerly known as Cheilanthes covillei,[1] is a species of cheilanthoid fern known by the common name Coville's lip fern. Coville's lip fern is native to the southwestern United States and Mexico.[2]
This fern has dark to medium green leaves (fronds) which may be up to 4-pinnate (made up of leaflets that subdivide up to 3 times), such that the leaflets are layered with overlapping rounded segments. The leaves as a whole have a bumpy, cobbled look when viewed from above. The edges of the leaflets are curled under (forming a false indusium) and their undersides have wide scales which are lengthened outgrowths of the epidermis. Tucked under the scales and false indusium are the sporangia, which make the spores.[2] Myriopteris covillei can be distinguished from its very similar relative Myriopteris intertexta by the scales on the underside of the leaflets. These scales are up to 3 mm wide at their base in M. covillei, giving them an elongated triangular papery appearance, whereas those of M. intertexta are 1 mm wide, appearing more like a flattened thread.[2]
Coville's lip fern is native to California, Baja California, Arizona, Oregon, and Utah.[3]
It grows in rocky crevices in the mountains and foothills. In California it is found in chaparral, yellow pine forest, pinyon-juniper woodland, and Joshua tree woodland habitats.[2]
Based on plastid DNA sequence, Myriopteris covillei is part of Myriopteris clade C (covillei clade) and is most closely related to Myriopteris clevelandii and Myriopteris gracillima.[4] In addition, Myriopteris covillei is one of the parents of the fertile allotetraploid Myriopteris intertexta.[5][1][4]
Myriopteris covillei, formerly known as Cheilanthes covillei, is a species of cheilanthoid fern known by the common name Coville's lip fern. Coville's lip fern is native to the southwestern United States and Mexico.
Cheilanthes covillei, es una especie de helecho de la familia botánica Pteridaceae. Se encuentra en el sudoeste de los Estados Unidos y Baja California, donde crece en las grietas rocosas de las montañas y colinas.
Este helecho tiene hojas verdes que pueden ser hasta 4-pinnadas, es decir, formada por foliolos que se subdividen 3 veces, de manera que los foliolos se superponen como segmentos redondeados. Las hojas tienen un aspecto irregular, con forma de empedrado. El envés de las hojas tienen escamas que se alargan como excrecencias de la epidermis. Escondidos debajo de las escamas están los esporangios, con las esporas.
Cheilanthes covillei fue descrita por William Ralph Maxon y publicado en Proceedings of the Biological Society of Washington 31: 147. 1918.[1][2]
Cheilanthes covillei, es una especie de helecho de la familia botánica Pteridaceae. Se encuentra en el sudoeste de los Estados Unidos y Baja California, donde crece en las grietas rocosas de las montañas y colinas.
Myriopteris covillei là một loài thực vật có mạch trong họ Adiantaceae. Loài này được (Maxon) Á. Löve & D. Löve miêu tả khoa học đầu tiên năm 1977.[1]
Myriopteris covillei là một loài thực vật có mạch trong họ Adiantaceae. Loài này được (Maxon) Á. Löve & D. Löve miêu tả khoa học đầu tiên năm 1977.
