Horkelia rydbergii
Encyclopedia
Horkelia rydbergii is a species of flowering plant in the rose family
known by the common name Rydberg's horkelia. It is endemic to the Transverse Ranges
of southern California
, where it grows in several types of habitat, including pine
forest. This is a perennial herb producing a low mat of hairy, glandular gray-green foliage around a woody base. The leaves are mostly flat and made up of pairs of hairy, wedge-shaped leaflets with toothed tips. The inflorescence
is an open array of up to 40 flowers atop an erect stalk, each flower made up of five pointed green sepal
s and five white petals. At the center of the flower is a cone of 10 stamen
s around a bunch of up to 50 pistils
.
Rosaceae
Rosaceae are a medium-sized family of flowering plants, including about 2830 species in 95 genera. The name is derived from the type genus Rosa. Among the largest genera are Alchemilla , Sorbus , Crataegus , Cotoneaster , and Rubus...
known by the common name Rydberg's horkelia. It is endemic to the Transverse Ranges
Transverse Ranges
The Transverse Ranges are a group of mountain ranges of southern California, in the Pacific Coast Ranges physiographic region that runs along the Pacific coast from Alaska to Mexico in North America. The Transverse Ranges begin at the southern end of the California Coast Ranges and lie between...
of southern 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 grows in several types of habitat, including pine
Pine
Pines are trees in the genus Pinus ,in the family Pinaceae. They make up the monotypic subfamily Pinoideae. There are about 115 species of pine, although different authorities accept between 105 and 125 species.-Etymology:...
forest. This is a perennial herb producing a low mat of hairy, glandular gray-green foliage around a woody base. The leaves are mostly flat and made up of pairs of hairy, wedge-shaped leaflets with toothed tips. The inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...
is an open array of up to 40 flowers atop an erect stalk, each flower made up of five pointed green sepal
Sepal
A sepal is a part of the flower of angiosperms . Collectively the sepals form the calyx, which is the outermost whorl of parts that form a flower. Usually green, sepals have the typical function of protecting the petals when the flower is in bud...
s and five white petals. At the center of the flower is a cone of 10 stamen
Stamen
The stamen is the pollen producing reproductive organ of a flower...
s around a bunch of up to 50 pistils
Gynoecium
Gynoecium is most commonly used as a collective term for all carpels in a flower. A carpel is the ovule and seed producing reproductive organ in flowering plants. Carpels are derived from ovule-bearing leaves which evolved to form a closed structure containing the ovules...
.