Chionanthus pygmaeus

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Chionanthus pygmaeus
Chionanthus pygmaeus.jpg
Status TNC G3.svg
Vulnerable  (NatureServe)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Oleaceae
Genus: Chionanthus
Species:
C. pygmaeus
Binomial name
Chionanthus pygmaeus
Small

Chionanthus pygmaeus is a rare species of flowering plant in the olive family known by the common name pygmy fringetree. It is endemic to Florida, where there are 46 known occurrences as of 2010. [1] The plant is found in increasingly rare habitat in Central Florida that is being consumed for development, and some protected areas are not managed adequately. [1] Most populations are small. [1] It is a federally listed endangered species of the United States. [1]

Contents

Characteristics

This plant is quite variable in appearance, depending on the type of habitat in which it grows. [2] It is usually a shrub remaining under a meter tall, but at times may grow into a tree 4 to 5 meters in height. The branches may grow directly from the sand if totally buried in a dune. [2] The dark yellowish-green, leathery leaves are rough in shape and up to 10 centimeters long. The petioles may be maroon in color. The inflorescence is a panicle of three to six flowers borne in the leaf axils. The fragrant flower has four elongated, narrow lobes in its bell-shaped corolla and measures up to 1.5 centimeters long. The drooping panicle with many narrow corolla lobes may appear fringelike, hence the plant's common name. The fruit is a drupe up to 2.5 centimeters long which ripens purple or brownish. The plant reproduces sexually via seed and vegetatively by growing new shoots. It resprouts after its aboveground parts are burned away in the fire. [3] [4] It is a dioecious species. [5] It is probably quite long-lived. [4]

Habitat

The plant grows in Florida scrub, sandhills, hammocks, flatwoods, and transition zones between these habitats. [1] Many of these ecosystems are endangered and degraded, with remaining fragments under pressure from destructive forces. It is a plant of the well-drained yellow and white sands that remain from the ancient dunes that once covered this section of Central Florida. [1] Many populations are known to have been extirpated because they occurred on valuable private land and were destroyed when the properties were developed. [1] Most of its 46 occurrences are located on protected property, such as Lake Wales Ridge National Wildlife Refuge. [1] Not all of this protected land is managed properly, however. Most of the habitats in which the plants grow, such as scrub and sandhills, are dependent on periodic fires for their health and maintenance. When a fire occurs now it is generally quickly extinguished, preventing the natural fire regime. [1] Many areas, even in protected, conserved sites, are overgrown today because they have not burned in many years. [1] This and many other plants in these ecosystems cannot grow when they are shaded by tall woody vegetation. [1] [4]

This plant may be a dominant species in some very localized areas, and may be codominant with other shrubs and trees, forming thickets. [5] It has been noted to grow alongside yellow plum (Ximenia americana), silk bay (Persea humilis), scrub hickory (Carya floridana), sand pine (Pinus clausa), sandhill rosemary (Ceratiola ericoides), and several oaks. [5] [4] It grows with its relative, white fringetree (Chionanthus virginicus), and sometimes hybridizes with it. [5]

More research is needed for this species, because many aspects of its life history, reproduction, pollination, population biology, fire ecology, genetics, and other factors in its biology are unknown. [1]

Endangered status

There are many populations of this plant, and it is locally common to abundant in a few areas. [2] [5] In general, however, the populations are small, in some cases made up of a single plant. [2] The United States Fish and Wildlife Service will not downlist the species to threatened status until there is reliable scientific evidence describing the population size and characteristics necessary for the continued survival of the species. [1] Also, its habitat must be safe from damage and degradation, including improper fire management and outright destruction in the conversion of the land to housing or agriculture use. [1]

Related Research Articles

<span class="mw-page-title-main">Lake Wales Ridge National Wildlife Refuge</span> United States National Wildlife Refuge in Florida

The Lake Wales Ridge National Wildlife Refuge is part of the United States National Wildlife Refuge (NWR) System, located in four separated areas on the Lake Wales Ridge east of US 27 between Davenport and Sebring Florida. The 1,194 acre (4.8 km2) refuge was established in 1990, to protect a host of plants and animals. It is also the first to be designated primarily for the preservation of endangered plants, and is not open to the general public. It contains a high proportion of remaining Florida scrub habitat. It is administered as part of the Merritt Island National Wildlife Refuge.

<i>Chionanthus</i> Genus of trees

Chionanthus, common name: fringetrees, is a genus of about 150 species of flowering plants in the family Oleaceae.

<i>Chionanthus virginicus</i> Species of tree

Chionanthus virginicus is a tree native to the savannas and lowlands of the northeastern and southeastern United States, from Massachusetts south to Florida, and west to Oklahoma and Texas.

<i>Asimina tetramera</i> Species of tree

Asimina tetramera, commonly known as the four-petal pawpaw, is a rare species of small tree or perennial shrub endemic to Martin and Palm Beach Counties in the state of Florida. The species is currently listed as endangered under the Endangered Species Act and as endangered by the International Union for Conservation. The four-petal pawpaw is part of the Annonaceae family alongside other Asimina species.

<i>Chrysopsis floridana</i> Species of plant

Chrysopsis floridana is a rare species of flowering plant in the family Asteraceae, known by its common name, Florida golden aster. It is endemic to Florida in the United States, where it is known from Hillsborough, Hardee, Manatee, and Pinellas Counties. It is considered an endemic of the west-central coast of the state in the general vicinity of Tampa Bay. There are 17 to 20 occurrences, many of which have few individuals, but one of which has over one million plants. In 1986 the plant was added to the US endangered species list because it was becoming increasingly rare, it was growing only on private property, and its habitat was unprotected and being destroyed and degraded by a number of forces. It is found at Bell Creek Nature Preserve in Riverview, Florida.

<i>Cladonia perforata</i> Species of fungus

Cladonia perforata is a rare species of lichen known as Florida perforate cladonia and Florida perforate reindeer lichen. It is endemic to the state of Florida in the United States, where it is known from 16 populations in four widely separated areas of the state. It is native to a very specific type of Florida scrub habitat which is increasingly rare and patchy due to habitat destruction, degradation, and fragmentation. In 1993 this was the first species of lichen to be federally listed as an endangered species of the United States.

<i>Clitoria fragrans</i> Species of legume

Clitoria fragrans is a rare species of flowering plant in the legume family known by the common name pigeon wings, or sweet-scented pigeon wings. It is endemic to Central Florida, where it was known most recently from 62 occurrences, but no current estimates of the total global population are available. The plant is a federally listed threatened species of the United States.

<i>Conradina brevifolia</i> Species of flowering plant

Conradina brevifolia is a rare species of shrub in the mint family known by the common name short-leaved false rosemary. It is endemic to Central Florida, where it is known only from the Lake Wales Ridge. There are perhaps 36 occurrences of the plant remaining, and 10 of these are likely to be destroyed as their habitat is fragmented in the coming years. About 15% of the Lake Wales Ridge, the only home territory of the plant, remains today, the rest having been cleared for development and citrus groves. Few of the extant populations have more than 25 plants. This is a federally listed endangered species of the United States.

<i>Conradina etonia</i> Species of flowering plant

Conradina etonia is a rare species of shrub in the mint family known by the common name Etonia rosemary. It is endemic to Putnam County, Florida, where it is known from about 8 populations on Etoniah Creek State Forest containing fewer than 1000 total individuals. It has a specific habitat requirement and the main threat it faces is destruction and degradation of its habitat. It is a federally listed endangered species of the United States.

Dicerandra cornutissima is a rare species of flowering plant in the mint family known by the common name longspurred mint, longspurred balm, and Robin's mint. It is endemic to Florida in the United States. It is found in Marion County, and possibly Sumter County, but it may have been totally extirpated from the latter. There are 15 known occurrences remaining. The plant was federally listed as an endangered species in 1985.

<i>Dicerandra frutescens</i> Species of plant

Dicerandra frutescens is a rare species of flowering plant in the mint family known by the common names scrub mint and scrub balm. It is endemic to Highlands County, Florida, where it is known only from the Lake Wales Ridge. Its habitat is quickly being lost as it is converted to residential and agricultural use. It was federally listed as an endangered species of the United States in 1985.

<i>Eryngium cuneifolium</i> Species of flowering plant in the celery family Apiaceae

Eryngium cuneifolium is a rare species of flowering plant in the carrot family known by the common names wedgeleaf eryngo, wedge-leaved button-snakeroot, and simply snakeroot. It is endemic to the state of Florida in the United States where it is known only from Highlands County. It is one of many rare species that can be found only on the Lake Wales Ridge, an area of high endemism. It was federally listed as an endangered species of the United States in 1987.

<i>Hypericum cumulicola</i> Species of flowering plant in the St Johns wort family Hypericaceae

Hypericum cumulicola is a rare species of flowering plant in the family Hypericaceae known by the common name highlands scrub hypericum, or highlands scrub St. John's wort. It is endemic to Florida, where it is threatened by habitat loss and degradation. It is a federally listed endangered species of the United States.

<i>Liatris ohlingerae</i> Species of flowering plant

Liatris ohlingerae is a rare species of flowering plant in the family Asteraceae known by the common names Florida blazing star, Florida gayfeather, scrub blazing star, and sandtorch. It is endemic to Florida in the United States, where it occurs only on the Lake Wales Ridge along with many other rare plants. It is threatened by the loss and degradation of its habitat, and it is federally listed as an endangered species.

<i>Lupinus aridorum</i> Species of legume

Lupinus aridorum is a rare species of lupine known by the common name scrub lupine. It is endemic to Florida in the United States, where there were 10 known populations remaining in 2003. Fewer than 6000 individual plants were counted. It is threatened by the loss and degradation of its habitat. The scrub lupine is a federally listed endangered species of the United States.

<i>Nolina brittoniana</i> Species of plant

Nolina brittoniana is a rare species of flowering plant in the asparagus family known by the common name Britton's beargrass. It is endemic to Florida, where there are 72 known populations, only a few of which are large enough to be considered viable. It is federally listed as an endangered species of the United States.

<i>Polygala lewtonii</i> Species of flowering plant

Polygala lewtonii is a rare species of flowering plant in the milkwort family known by the common name Lewton's polygala, or Lewton's milkwort. It is endemic to Florida in the United States, where it is limited to the central ridge of the peninsula. There are about 49 occurrences of the plant remaining. Most occurrences contain very few plants. The species is threatened by the loss and degradation of its habitat. This is a federally listed endangered species of the United States.

<i>Prunus geniculata</i> Species of tree

Prunus geniculata is a rare species of plum known by the common name scrub plum. The species is endemic to Florida.

<i>Warea amplexifolia</i> Species of flowering plant

Warea amplexifolia is a rare species of flowering plant in the mustard family known by the common names wideleaf pinelandcress, wide-leaf warea, and clasping warea. It is endemic to Florida in the United States, where it is limited to a few counties in the central part of the peninsula. It is threatened by the loss and degradation of its habitat. It is a federally listed endangered species of the United States.

The Florida peninsula inland scrub is a shrubland community found on the Florida peninsula. The largest remaining blocks of inland scrub are in and around the Ocala National Forest and in the Lake Wales Ridge National Wildlife Refuge. The Archbold Biological Station near Lake Placid contains about 20 km2 (7.7 sq mi) of scrub habitat and sponsors biological research on it. The scrub occurs on a series of north-south running ridges composed of sand derived from ancient dune fields. The soil, a type of entisol, is derived from quartz and is low in organic matter, silt, and clay. Because the low-nutrient sandy soils do not retain moisture, the ecosystem is effectively an arid one.

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 USFWS. C. pygmaeus Five Year Review. August 17, 2010.
  2. 1 2 3 4 The Nature Conservancy
  3. USFWS. [httpthe ://www.fws.gov/verobeach/images/pdflibrary/chpy.PDF Pygmy Fringetree.] Multispecies Recovery Plan for South Florida.
  4. 1 2 3 4 Center for Plant Conservation Archived 2010-12-15 at the Wayback Machine
  5. 1 2 3 4 5 USFWS. Pygmy Fringetree. Multispecies Recovery Plan for South Florida.