Aspidotis carlotta-halliae
Encyclopedia
Aspidotis carlotta-halliae is a species of fern
known by the common names tufted lacefern and Carlotta Hall's lace fern. It is endemic to California
, where it is found in the Central Coast Ranges and coastal hillsides, often on serpentine soil
s. This species is a fertile hybrid between Aspidotis californica
and Aspidotis densa
; in appearance it is intermediate between the two other ferns. It has leathery triangular leaves divided into many pairs of leaflets, which are each subdivided into many toothed segments. The undersides of the segments are lined with sori
containing sporangia
. The fern was named for fern collector Carlotta Case Hall, who coauthored the 1912 botanical guide A Yosemite Flora with her husband, botanist Harvey Monroe Hall.
Fern
A fern is any one of a group of about 12,000 species of plants belonging to the botanical group known as Pteridophyta. Unlike mosses, they have xylem and phloem . They have stems, leaves, and roots like other vascular plants...
known by the common names tufted lacefern and Carlotta Hall's lace fern. It is endemic to California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
, where it is found in the Central Coast Ranges and coastal hillsides, often on serpentine soil
Serpentine soil
A serpentine soil is derived from ultramafic rocks, in particular serpentinite, a rock formed by the hydration and metamorphic transformation of ultramafic rock from the Earth's mantle....
s. This species is a fertile hybrid between Aspidotis californica
Aspidotis californica
Aspidotis californica is a species of fern known by the common name California lacefern. It is native to California and Baja California....
and Aspidotis densa
Aspidotis densa
Aspidotis densa is a species of fern known by the common name Indian's dream. It is native to western North America from British Columbia to California to Wyoming, as well as parts of eastern North America including Quebec....
; in appearance it is intermediate between the two other ferns. It has leathery triangular leaves divided into many pairs of leaflets, which are each subdivided into many toothed segments. The undersides of the segments are lined with sori
Sorus
A sorus is a cluster of sporangia .In fungi and lichens, the sorus is surrounded by an external layer. In some red algae it may take the form of a depression into the thallus....
containing sporangia
Sporangium
A sporangium is an enclosure in which spores are formed. It can be composed of a single cell or can be multicellular. All plants, fungi, and many other lineages form sporangia at some point in their life cycle...
. The fern was named for fern collector Carlotta Case Hall, who coauthored the 1912 botanical guide A Yosemite Flora with her husband, botanist Harvey Monroe Hall.