Epilobium ciliatum

Last updated

Epilobium ciliatum
Epilobium ciliatum FWS-01.jpg
Epilobium ciliatum subsp. watsonii
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Onagraceae
Genus: Epilobium
Species:
E. ciliatum
Binomial name
Epilobium ciliatum
Synonyms
  • Epilobium adenocaulonHausskn.
  • Epilobium bergianumA.K.Skvortsov
  • Epilobium glandulosumLehm.
  • Epilobium watsoniiBarbey

Epilobium ciliatum, known by the common names fringed willowherb, [1] American willowherb, [2] slender willow herb, and northern willow herb is a species of flowering plant in the willowherb family Onagraceae. This species is native to much of North America, southern South America, and East Asia. It is an introduced species in much of Eurasia and Australia. [3]

Contents

This perennial herbaceous plant usually occurs in wetlands, but may be found in a great variety of habitats, including disturbed areas and roadsides, at elevations below 1,400 metres (4,600 ft). [3]

Description

Epilobium ciliatum is a clumping perennial often exceeding 1.5 metres (4.9 ft) in height. It has thickly veined lance-shaped leaves which may be up to 15 centimeters long toward the base of the plant. The foliage, stem, and inflorescence are covered in bristly hairs and glands. [4]

There are four sepals. The regular, trumpet-shaped flowers have four petals which are so deeply notched they look like four pairs. They are white to light purple or pink with dark veining. [4] There are eight stamens and a club-shaped stigma. The fruit is a narrow, hairy, four-chambered capsule up to 10 centimeters in length which may be held on a long stalk. The seeds are downy and can float for long distances with the wind. [5]

Subspecies

Three subspecies are currently recognized:

Taxonomy

Epilobium ciliatum may be a cryptic species complex. The Rocky Mountain Willowherb (Epilobium saximontanum) is sometimes included as yet another subspecies.

The three currently recognized subspecies may each constitute a distinct species. If so, E. ciliatum ssp. watsonii would perhaps use the name E. adenocaulon and include those populations, while E. ciliatum ssp. glandulosum would perhaps use the name E. bergianum and include those populations. The others named E. ciliatum ssp. ciliatum populations would remain.

Distribution and habitat

Epilobium ciliatum is native to the southern part of Canada and most of the United States of America. It arrived in northern Europe early in the 20th century and spread rapidly, reaching Finland in about 1920. It is a plant of moist places, stream-sides, ditches, ponds, gardens, roadsides, recently cleared areas and wasteland. [5]

Related Research Articles

<i>Epilobium canum</i> Species of flowering plant

Epilobium canum, also known as California fuchsia or Zauschneria, is a species of willowherb in the evening primrose family (Onagraceae). It is native to dry slopes and in chaparral of western North America, especially California. It is a perennial plant, notable for the profusion of bright scarlet flowers in late summer and autumn.

<i>Chamaenerion angustifolium</i> Species of flowering plant in the willowherb family Onagraceae

Chamaenerion angustifolium is a perennial herbaceous flowering plant in the willowherb family Onagraceae. It is known in North America as fireweed, in some parts of Canada as great willowherb, in Britain and Ireland as rosebay willowherb. In the United Kingdom it is also known as bombweed, as a result of its rapid appearance on city bomb sites during the Blitz of World War II; the plant is also traditionally known as Saint Anthony's laurel. It is also known by the synonyms Chamerion angustifolium and Epilobium angustifolium. It is native throughout the temperate Northern Hemisphere, including large parts of the boreal forests.

<i>Epilobium</i> Genus of flowering plants in the willowherb family Onagraceae

Epilobium is a genus of flowering plants in the family Onagraceae, containing about 197 species. The genus has a worldwide distribution. It is most prevalent in the subarctic, temperate and subantarctic regions, whereas in the subtropics and tropics Epilobium species are restricted to the cool montane biomes, such as the New Guinea Highlands.

<i>Chamaenerion</i> Genus of flowering plants in the willowherb family Onagraceae

Chamaenerion is a genus of flowering plants in the family Onagraceae. It has sometimes been included in the genus Epilobium. Members of the genus may be called willowherbs, or fireweeds, based on a common name used for C. angustifolium. They are upright herbaceous perennials, growing from a woody base or from rhizomes, with racemes of usually purple to pink flowers. All species are found in the northern hemisphere. Most occur in moist habitats; C. angustifolium is the exception, favouring disturbed ground.

<i>Epilobium glaberrimum</i> Species of flowering plant in the willowherb family Onagraceae

Epilobium glaberrimum is a species of willowherb known by the common name glaucous willowherb. This clumping perennial wildflower is native to western North America from central Canada to northern Mexico. It generally grows at some elevation in moist places. This plant is somewhat variable in appearance. It may exceed half a meter in height and has hairless foliage with leaves between one and 8 centimeters long. The flower has four notched petals in purple, pink, or white which may be only a couple of millimeters long to over a centimeter long each. The fruit is a narrow, sticklike capsule 2 to 7 centimeters long.

<i>Epilobium obcordatum</i> Species of flowering plant in the willowherb family Onagraceae

Epilobium obcordatum is a species of perennial plant in the evening-primrose family (Onagraceae), known by the common name rockfringe willowherb and rock fringe. It is native to the western United States from California to Idaho, where it is found in rocky mountainous areas, at altitudes of 7,000 ft (2,100 m) to 13,000 ft (4,000 m). This small perennial is clumpy to mat-forming and spreads from a woody caudex, especially in nooks between rocks. It has stems lined with oval or rounded leaves which spread parallel to the ground or ascend somewhat. At the tips of the thin stems are flowers each with four petals. The petals are magenta to purple, rounded and notched, often in a perfect heart shape, and are one or two centimeters long. The glandular, club-like, ridged fruit is a capsule two to four centimeters long growing on a short stalk.

<i>Epilobium palustre</i> Species of flowering plant

Epilobium palustre is a species of willowherb known by the common name marsh willowherb. This plant has a circumboreal distribution, and can be found farther south in mountainous areas.

<i>Atriplex watsonii</i> Species of aquatic plant

Atriplex watsonii is a species of saltbush known by the common name Watson's saltbush, or Watson's orach. It is native to the coastline of California and Baja California, where it grows in coastal areas with saline soils, such as salt marshes and beach scrub, with other halophytes such as saltgrass. It extends inland in the Los Angeles Basin, and along the Santa Ana River.

<i>Epilobium clavatum</i> Species of flowering plant in the willowherb family Onagraceae

Epilobium clavatum is a species of flowering plant in the evening primrose family known by the common names talus willowherb and clavatefruit willowherb. It is native to western North America from Alaska to northern California to Colorado, where it grows in rocky high mountain habitat such as talus. It is a clumping perennial herb forming bristly mounds up to about 20 centimeters high and spreading outward via tough stolons. The oval-shaped leaves are 1 to 3 centimeters long. The inflorescence is an erect raceme of flowers, each with four small pink petals. The fruit is a capsule up to 4 centimeters long.

<i>Chamaenerion latifolium</i> Species of flowering plant in the willowherb family Onagraceae

Chamaenerion latifolium is a species of flowering plant in the evening primrose family known by the English common names dwarf fireweed and river beauty willowherb. It has a circumboreal distribution, appearing throughout the northern regions of the Northern Hemisphere, including subarctic and Arctic areas such as snowmelt-flooded gravel bars and talus, in a wide range of elevations. This is a perennial herb growing in clumps of leaves variable in size, shape, and texture above a woody caudex. The leaves are 1 to 10 centimeters long, lance-shaped to oval, pointed or rounded at the tips, and hairy to hairless and waxy. The inflorescence is a rough-haired raceme of nodding flowers with bright to deep pink, and occasionally white, petals up to 3 centimeters long. Behind the opened petals are pointed sepals. The fruit is an elongated capsule which may exceed 10 centimeters in length.

<i>Epilobium oreganum</i> Species of flowering plant in the willowherb family Onagraceae

Epilobium oreganum is an uncommon species of flowering plant in the evening primrose family known by the common names Grants Pass willowherb and Oregon fireweed. It is native to southern Oregon and northern California, where it is historically known mostly from the Klamath Mountains. It is currently confirmed to exist only in Josephine County, Oregon, and Trinity County, California, where it grows in boggy areas on serpentine soils. It is a perennial herb growing up to a meter in height with thin, hairless stems. The red-veined leaves are oval to lance-shaped and up to 9 centimeters long. The inflorescence bears flowers with pink petals just over a centimeter long and a protruding pistil. The fruit is a hairy, glandular capsule up to 4.5 centimeters long.

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

Oenothera californica, known by the common name California evening primrose, is a species of flowering plant in the evening primrose family.

<i>Rumex pulcher</i> Species of flowering plant

Rumex pulcher is a species of flowering plant in the knotweed family known by the common name fiddle dock. It is native to Eurasia and North Africa and it can be found elsewhere, including parts of North America, as an introduced species and a roadside weed. Europe. It is quite variable in appearance, and some authorities divide it into several subspecies that are more or less distinguishable. In general, it is a perennial herb producing a slender, erect stem from a thick taproot, approaching 70 centimeters in maximum height. The top of the plant may bend, especially as the fruit develops. The leaves are up to 10 or 15 centimeters long and variable in shape, though often oblong with a narrow middle in the rough shape of a fiddle. The inflorescence is made up of many branches, each an interrupted series of clusters of flowers with up to 20 in each cluster, each flower hanging from a pedicel. The flower has usually six tepals, the inner three of which are edged with teeth and have tubercles at their centers.

<i>Rumex salicifolius</i> Species of flowering plant

Rumex salicifolius is a species of flowering perennial plant in the knotweed family known by the common names willow dock and willow-leaved dock. It is native to much of western North America, and more specifically, in southern and central parts of California, and some parts of Arizona and Nevada. It can also be found in parts of Europe as an introduced species and a roadside weed. It is an extremely variable plant which is generally divided into many varieties, some of which may actually be specimens of other species.

<i>Silene campanulata</i> Species of flowering plant

Silene campanulata is a species of flowering plant in the family Caryophyllaceae known by the common names Red Mountain catchfly and bell catchfly. It may be a synonym of Silene greenei.

<i>Epilobium parviflorum</i> Species of flowering plant in the willowherb family Onagraceae

Epilobium parviflorum, commonly known as the hoary willowherb or smallflower hairy willowherb, is a herbaceous perennial plant of the family Onagraceae.

Epilobium brunnescens is a flowering plant belonging to the willowherb genus Epilobium in the family Onagraceae. It is a small, creeping, perennial plant with white or pale pink flowers. It is native to New Zealand and south-east Australia and has been introduced to Northern Europe. Its common names include New Zealand willowherb in Great Britain and Ireland, creeping willowherb in New Zealand and bog willowherb for the Australian subspecies.

<i>Epilobium tetragonum</i> Species of flowering plant in the willowherb family Onagraceae

Epilobium tetragonum, commonly known as the square stalked willow herb, is a species of flowering plant in the willowherb family Onagraceae.

<i>Epilobium coloratum</i> Species of flowering plant of the family Onagraceae native to North America

Epilobium coloratum, known by the common names purpleleaf willowherb and cinnamon willow-herb, is a species of flowering plant in the genus Epilobium of the willowherb family Onagraceae. This species is native to the Midwest and Eastern United States, as well as the Canadian provinces of Ontario, Québec, New Brunswick, Nova Scotia, and Newfoundland. It is also native to the Dominican Republic and Haiti.

References

  1. USDA, NRCS (n.d.). "Epilobium ciliatum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 27 June 2016.
  2. BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 27 June 2016.
  3. 1 2 "Jepson Flora Project:Onagraceae" . Retrieved 18 July 2013.
  4. 1 2 "Northern Willow Herb, Epilobium ciliatum". calscape.org.
  5. 1 2 "American Willowherb". NatureGate. Retrieved 2013-12-24.
  6. Jepson: Epilobium ciliatum ssp. ciliatum
  7. USDA: Epilobium ciliatum ssp. ciliatum
  8. Jepson: Epilobium ciliatum ssp. glandulosum
  9. USDA: Epilobium ciliatum ssp. glandulosum
  10. Jepson: Epilobium ciliatum ssp. watsonii
  11. USDA:Epilobium ciliatum ssp. watsonii