Brodiaea filifolia

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Brodiaea filifolia
Brodiaeafilifolia.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Asparagaceae
Subfamily: Brodiaeoideae
Genus: Brodiaea
Species:
B. filifolia
Binomial name
Brodiaea filifolia
Synonyms

Hookera filifolia

Brodiaea filifolia (thread-leaved brodiaea), San Gabriel Valley Brodiaea filifolia (thread-leaved brodiaea).jpg
Brodiaea filifolia (thread-leaved brodiaea), San Gabriel Valley

Brodiaea filifolia, known by the common name thread-leaved brodiaea, is a rare species of flowering plant in the cluster-lily genus. It is endemic to southern California, mostly in the region around the junction of Orange, Riverside, and San Diego Counties.

Contents

The bulb is a resident of scattered remaining vernal pool and grassland habitats. It is a federally listed threatened species and it has been listed as an endangered species since 1982 [1] on the state level.

Description

Brodiaea filifolia is a perennial producing an inflorescence 20 to 30 centimeters tall which bears bright purple flowers. Each flower has six spreading tepals 1 to 1.5 centimeters long with a center containing three stamens and narrow or small staminodes, which are flat sterile stamens lying against the tepals.

The thread-leaved brodiaea exists as a dormant, water-retaining corm or bulb at the beginning of its life cycle. [1] This period can last from late summer to mid-winter or until ideal conditions for growth are met. [1] Blooming season ranges from spring to early summer. [1]

Etymology

The genus, Brodiaea, is the namesake of Scottish botanist, James Brodie. [2] [3]

The term filifolia is a descriptor for thin, thread-like leaves. It is derived from the Latin words ‘filum’ and ‘folium’ meaning ‘thread’ and ‘leaf’ respectively, hence the species distinction ‘thread-leaved’. [2] [4]

Distribution and Habitat

This plant occurs in grassland areas, often in floodplains, and it is a member of the local vernal pool flora. [5] It thrives in an acidic – though almost neutral – pH range specifically between 6.1-6.4. [6] These habitats and conditions are becoming increasingly rare as they are being cleared for development, especially as residential areas expand. [5] Undeveloped land near residential areas is degraded by exotic vegetation, mowing and other fire suppression efforts, sewage dumping, grazing of livestock, off-road vehicle use, and other processes such as the displacement and redirection of water sources. [5] [1]

The plant is also at risk for reduced genetic variability. While the thread-leaved brodiaea is able to drop seeds like most other angiosperms, it primarily reproduces vegetatively by producing new corms, a method of cloning which does not produce individuals with new combinations of genes. [1] [5] Successful pollination by other organisms is also difficult to come across since the species responsible for effectively pollinating Brodiaea filifolia are limited to the tumbling flower beetle and the sweat bee. [7] When the plant does reproduce sexually, it requires unrelated individuals which have different genes. It cannot fertilize itself, nor can it successfully reproduce with closely related individuals. [5] Small population sizes that have low genetic diversity and wide distances between populations make it less likely the plant will successfully undergo sexual reproduction. [5] [1] The plant sometimes hybridizes with Brodiaea orcuttii . [1]

Brodiaea filifolia is concentrated in select areas of Southern California. [7] There are about 68 occurrences remaining in widely spaced locations between the San Gabriel Mountains and west-central San Diego County. [1] Several occurrences have been discovered since the plant joined the endangered species list, including locations on Camp Pendleton, and a few have been extirpated. [1]

Conservation

In order to combat the increasing threat that urbanization has on the growth of Brodiaea filifolia, individual counties within its region of occurrence have taken action to protect the remaining population.

Los Angeles County

B. filifolia has been greatly affected by the copious amounts of urban modifications that occur in the Los Angeles area. However, a long-term protection effort has been upheld by the Glendora Community Conservancy. [1] This has proven to be rather effective, as it has been observed that the number of occurrences increased from 2 to 7 between the years 2009 to 2023. Out of those, 4 are permanently conserved. [6]

San Bernardino County

San Bernardino County had been less active in the effort to secure its sparse numbers of Brodiaea filifolia, until more recent years. Back in 2009, there was no recorded conservation status for any extant occurrences. [1] Since then, there has been an observed increase of one occurrence and it is now known that one of three is being conserved by the San Bernardino National Forest. [6]

Riverside County

As of 2023, all reported instances are protected under the Western Riverside County Multiple Species Habitat Conservation Plan (WRCMSHCP). [6]

Orange County

The population of B. filifolia in Orange County has grown to twice its size in the past one and a half decades as a result of the multiple Habitat Conservation Plans (HCP) taking place within the County. [6]

San Diego County

San Diego County is home to one of the most prominent conservation efforts in Southern California, that being the site of Marine Corps Base Camp Pendleton (MCBCP). [1] [6] The thread-leaved brodiaea grows in abundance in this area and military training procedures have even been modified to accommodate species growth and protection. [6]

Besides Camp Pendleton, there are also many projects and plans in San Diego County that work towards limiting habitat loss. This creates greater opportunities for B. filifolia to grow to the extent it has in San Diego County compared to other regions of Southern California. [6]

Related Research Articles

<i>Brodiaea</i> Genus of flowering plants

Brodiaea, also known by the common name cluster-lilies, is a monocot genus of flowering plants.

<span class="mw-page-title-main">Vernal pool</span> Seasonal pools of water that provide habitat

Vernal pools, also called vernal ponds or ephemeral pools, are seasonal pools of water that provide habitat for distinctive plants and animals. They are considered to be a distinctive type of wetland usually devoid of fish, and thus allow the safe development of natal amphibian and insect species unable to withstand competition or predation by fish. Certain tropical fish lineages have however adapted to this habitat specifically.

<i>Lasthenia conjugens</i> Species of flowering plant

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<i>Branchinecta sandiegonensis</i> Species of crustacean

Branchinecta sandiegonensis is a rare species of crustacean in the family Branchinectidae and the order Anostraca, the fairy shrimp. Commonly known as the San Diego fairy shrimp, it is named after the vernal pools found in San Diego County, California, where this species was originally discovered. It is also a federally listed endangered species of the United States.

<i>Lepidurus packardi</i> Species of small freshwater animal

Lepidurus packardi, the vernal pool tadpole shrimp, is a small, rare species of tadpole shrimp (Notostraca) found in temporary ponds of the western United States.

<i>Hooveria purpurea</i> Species of flowering plant

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<i>Dudleya brevifolia</i> Species of succulent plant from California

Dudleya brevifolia, is a rare succulent plant known by the common name short-leaved liveforever, short-leaved dudleya or rarely the Del Mar Hasseanthus. It is an edaphic endemic that only grows on Lindavista formation marine terraces, on surfaces with ironstone nodules. The leaves are deciduous, and disappear after the inflorescence develops. The small white flowers are star-shaped with a yellow center. After flowering, any above ground trace of the plant will disappear, and it survives under the earth with a starch-rich subterranean caudex. Dudleya brevifolia is only found on coastal mesas along a small strip of coast in San Diego County, California.

<span class="mw-page-title-main">Loch Lomond Vernal Pool Ecological Reserve</span> Natural reserve in California

The Loch Lomond Vernal Pool Ecological Reserve is a nature reserve of 8.22 acres (33,300 m2) in the community of Loch Lomond in Lake County, California. It is one of 119 ecological reserves managed by the California Department of Fish and Game (CDFG). The ecological reserve system was authorized by the state legislature in 1968 for the purpose of conservation and protection of rare plants, animals and habitats.

<i>Ambrosia pumila</i> Species of flowering plant

Ambrosia pumila is a rare species of herbaceous perennial plant known by the common names San Diego ragweed and San Diego ambrosia. It is native to far southern California, Baja California, and Baja California Sur. It grows in floodplains and open grasslands in proximity to wetland areas.

<i>Brodiaea orcuttii</i> Species of plant

Brodiaea orcuttii is a species of flowering plant in the asparagus family, of the subfamily Brodiaeoideae. It is a cluster-lily known commonly as Orcutt's brodiaea. This corm-sprouting species is nearly endemic to San Diego County, with the periphery of its range reaching the southern portion of Riverside County along with some populations sparsely scattered in northwestern Baja California. Brodiaea orcuttii is usually associated with the marginal areas of vernal pools, seeps, meadows, and stream embankments, microhabitats which can generally be found from coastal mesas to interior mountains. The red-purple to blue flowers bloom from April to July. It can be distinguished from all other species of Brodiaea by its lack of staminodes.

<i>Brodiaea pallida</i> Species of flowering plant

Brodiaea pallida is a rare species of flowering plant in the cluster-lily genus known by the common name Chinese Camp brodiaea.

<i>Bloomeria clevelandii</i> Species of flowering plant

Bloomeria clevelandii is a rare species of flowering plant that is known by the common name San Diego goldenstar. It is native to a strip of scrub and coastal grassland in San Diego County, California, and adjacent Baja California. Genetic analysis of several morphologically similar genera shows that this species, which was named Muilla clevelandii for several decades, is not very closely related to the other members of Muilla and is moved back to Bloomeria.

<i>Orcuttia californica</i> Species of flowering plant

Orcuttia californica is a rare species of grass known by the common name California Orcutt grass.

Brodiaea santarosae is a rare Brodiaea species known by the common name Santa Rosa brodiaea and Santa Rosa Basalt brodiaea. It is endemic to southern California, mostly in the region around the junction of Orange, Riverside, and San Diego Counties and limited to ancient basaltic soils. There are only five known populations. It was once thought to be an intergrade of Brodiaea filifolia and B. orcuttii, but measurements found this to be false. It was described as a new species in 2007.

<i>Pogogyne nudiuscula</i> Species of flowering plant

Pogogyne nudiuscula is a rare species of flowering plant in the mint family known by the common name Otay mesa mint. It is native to southern San Diego County, California, where it is known only from Otay Mesa near the border with Baja California. It was identified on land south of the Mexican border, but these occurrences have probably been extirpated. It is now known from seven vernal pool complexes just north of the border, and it is a federally listed endangered species of the United States.

<i>Triteleia hyacinthina</i> Species of tree

Triteleia hyacinthina is a species of flowering plant known by the common names white brodiaea, white tripletlily, hyacinth brodiaea, and fool's onion. It is native to western North America from British Columbia to Idaho to central California. Its habitat includes grassland and vernally moist areas such as meadows and vernal pools. It is a perennial herb growing from a corm. It produces two or three basal leaves up to 40 centimeters (16 in) long by 2 centimeters (0.79 in) wide. The inflorescence arises on an erect stem up to 60 centimeters (24 in) tall and bears an umbel-like cluster of many flowers. Each flower is a funnel-shaped bloom borne on a pedicel up to 5 centimeters (2.0 in) long. The flower is white, often tinged purple along the tubular throat, with six green-veined tepals. There are six stamens with white, yellow, or occasionally blue anthers.

<i>Triteleia peduncularis</i> Species of flowering plant

Triteleia peduncularis is a monocot flowering plant in the genus Triteleia. Its common names include long-ray brodiaea and longray triteleia. It is endemic to California, where it occurs in the coastal and inland mountain ranges of the northern and central sections of the state. It grows in vernally moist habitat such as meadows, grassland, and vernal pools, often in areas with serpentine soils. It is a perennial wildflower growing from a corm. There are two or three basal leaves measuring up to 40 cm (16 in) long and 1.5 cm (0.6 in) wide. The inflorescence arises on a smooth, erect stem up to 80 cm (31 in) tall. It is an umbel-like cluster of several flowers which are borne on very long, straight pedicels measuring up to 18 cm (7.1 in) long. Each funnel-shaped flower is white, often tinged purple, with six tepals up to 1.6 cm (0.6 in) in length. There are six stamens with white anthers, and the ovary at the center is yellow when the flower is young.

<i>Harperocallis flava</i> Species of flowering plant

Harperocallis flava, known by the common name Harper's beauty, is a species endemic to parts of Florida in the United States, where it is known mainly from the Apalachicola National Forest in the Panhandle. It is seriously endangered and has been on the United States' endangered species list since 1979.

<i>Lomatium cookii</i> Species of flowering plant

Lomatium cookii is a rare species of flowering plant in the carrot family known by the common names Cook's lomatium and agate desertparsley. It is endemic to Oregon in the United States, where it grows in only two valleys. It is a federally listed endangered species.

<i>Acanthomintha ilicifolia</i> Species of flowering plant

Acanthomintha ilicifolia, known by the common name San Diego thornmint, is a rare species of flowering plant in the mint family. It is native to Baja California and San Diego County, California, where it is a resident of the chaparral and coastal sage scrub plant communities and vernal pools.

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 USFWS. Five-year Review: B. filifolia. August 13, 2009.
  2. 1 2 Swinney, Dick (June 1991). "GLENDORA'S BRODIAEA FILIFOLIA". Glendora Natural History. Retrieved 22 October 2024.
  3. Charters, Michael L. "BL - BY". California Plant Names: Latin and Greek Meanings and Derivations. Retrieved 22 October 2024.
  4. Charter, Michael L. "F". California Plant Names:Latin and Greek Meanings and Derivations. Retrieved 22 October 2024.
  5. 1 2 3 4 5 6 The Nature Conservancy
  6. 1 2 3 4 5 6 7 8 USFWS (August 2023). "Brodiaea filifolia: 5-Year Review" (PDF).
  7. 1 2 Center For Biological Diversity. "Thread-leaved Brodiaea: Natural History". Center for Biological Diversity. Retrieved 22 October 2024.