Clethra

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Clethra
Clethra arborea1.jpg
Clethra arborea flowers
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Ericales
Family: Clethraceae
Genus: Clethra
L.
Type species
Clethra alnifolia
Synonyms[4]

Clethra is a genus of flowering shrubs or small trees described as a genus by Linnaeus in 1753.[5][6]

Clethra is one of two genera in the family Clethraceae (the other being Purdiaea). The species may be evergreen or deciduous, and all bear flowers in clusters or inflorescences.

Distribution[edit]

They are native to a variety of habitats, including swamps, woodland, and rocky sites[7] from temperate to tropical climates in eastern and southeastern Asia, Malesia, North and South America, and one species (C. arborea) on the island of Madeira.[4]

Species[edit]

The number of species accepted varies between different authorities depending on taxonomic interpretation, but with a recent trend to reduce the number recognised as distinct. The recent Flora of China[8] has cut the number accepted for China from 35 to 7 species, and the US Department of Agriculture[9] recognises only two in the United States, synonymising C. tomentosa with C. alnifolia. The following accepted by Kew Botanical Garden in London:[4]

  1. Clethra acuminata – mountain pepper bush; S Appalachians (AL to PA)
  2. Clethra alcoceri - Hidalgo, Jalisco
  3. Clethra alexandri - Jamaica
  4. Clethra alnifolia – sweet pepper bush; S + E USA (TX to ME)
  5. Clethra arborea – lily of the valley tree; Madeira, Canary islands†, Azores
  6. Clethra arfakana - New Guinea
  7. Clethra barbinervis – Japanese sweet shrub; SE China, Korea, Japan
  8. Clethra bodinieri – S China
  9. Clethra canescens - Philippines, E + C Indonesia, New Guinea
  10. Clethra castaneifolia - Peru
  11. Clethra chiapensis - Chiapas
  12. Clethra consimilis - Panama, Costa Rica
  13. Clethra conzattiana - Oaxaca
  14. Clethra crispaEcuador
  15. Clethra cubensis - Cuba
  16. Clethra cuneata - Peru, Bolivia
  17. Clethra delavayi – SW China, Assam, Myanmar, Bhutan and Vietnam
  18. Clethra elongata - Peru, Bolivia
  19. Clethra fabri – S China, Vietnam
  20. Clethra fagifolia - Ecuador, Colombia, Venezuela
  21. Clethra fargesii – C China
  22. Clethra ferruginea - Peru
  23. Clethra fimbriata – Peru, Ecuador, Colombia
  24. Clethra formosa - Costa Rica
  25. Clethra fragrans - Jalisco, Michoacán, Guerrero
  26. Clethra galeottiana - Puebla, Oaxaca, Chiapas
  27. Clethra gelida - Costa Rica, Panama, Honduras
  28. Clethra guyanensis - Guyana, Venezuela
  29. Clethra hartwegii - C + S Mexico
  30. Clethra hendersonii - Peninsular Malaysia
  31. Clethra hirsutovillosa - Guerrero
  32. Clethra hondurensis - Tabasco to Costa Rica
  33. Clethra javanica - Java, Bali, Lombok, Timor
  34. Clethra kaipoensis – SE China
  35. Clethra kebarensis - New Guinea
  36. Clethra licanioides – Guatemala, Honduras
  37. Clethra longispicata J.J.Sm.Borneo, Philippines, Sulawesi, Maluku
  38. Clethra luzmariae - Oaxaca
  39. Clethra macrophylla - Veracruz, Puebla
  40. Clethra mexicana – C + S Mexico, Central America, Colombia, Venezuela, Trinidad
  41. Clethra oaxacana - Oaxaca
  42. Clethra obovata – Ecuador, Peru
  43. Clethra occidentalis - Jamaica
  44. Clethra oleoides - C + S Mexico, Central America
  45. Clethra ovalifolia – Colombia, Venezuela, Ecuador, Peru
  46. Clethra pachecoana - Chiapas to Honduras
  47. Clethra pachyphylla – Borneo
  48. Clethra papuana - New Guinea
  49. Clethra paralelinervia – Ecuador
  50. Clethra × parvifolia - Chiapas
  51. Clethra pedicellaris - Colombia, Ecuador, Peru
  52. Clethra peruviana - Ecuador, Peru
  53. Clethra petelotiiVietnam, Yunnan
  54. Clethra poilanei - Laos
  55. Clethra pringlei - Mexican Summersweet; Mexico
  56. Clethra pulgarensis - Palawan
  57. Clethra purpusii - Oaxaca, Chiapas
  58. Clethra pyrogena - Panama, Costa Rica
  59. Clethra repanda – Colombia, Venezuela
  60. Clethra retivenia - Peru
  61. Clethra revoluta – Colombia, Bolivia, Ecuador, Peru
  62. Clethra rosei - Mexico
  63. Clethra rugosa – Colombia, Ecuador
  64. Clethra scabra – Brazil, Bolivia, Paraguay, NW Argentina
  65. Clethra skutchii - Guatemala
  66. Clethra sleumeriana - Hunan
  67. Clethra suaveolens - S Mexico, Central America
  68. Clethra sumatrana - Sumatra
  69. Clethra sumbawaensis - Lesser Sunda Islands
  70. Clethra symingtonii - Perak
  71. Clethra talamancana - Costa Rica
  72. Clethra tomentella - Philippines
  73. Clethra tutensis - Panama
  74. Clethra tuxtlensis - Veracruz
  75. Clethra uleana - S Brazil
  76. Clethra vicentina - S Mexico, Central America

References[edit]