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Toxicity and edibility:Mildly toxic

Clematis is a genus of perennial plants, most of which are vigorous, semiwoody climbing vines, but others are herbaceous perennials or shrubs. They are found throughout the temperate regions of both hemispheres, and also in mountains in the tropics. Most of the cool temperate species are deciduous, while many of the warmer climate species are evergreen.

Most species are known as Clematis in English, while some are also known as traveller's joy, leather flower, vase vine and virgin's bower, the last three being names used for North American species.

One recent classification recognised 297 species of clematis and modern taxonomists subdivide the genus. Magnus Johnson divided Clematis into 19 sections, several with subsections;[1] Christopher Grey-Wilson divided the genus into 9 subgenera, several with sections and subsections within them.[2] Several of the subdivisions are fairly consistent between different classifications, for example all Grey-Wilson's subgenera are used as sections by Johnson.

Subgenera of Clematis according to Grey-Wilson:

Clematis, Cheiropsis, Flammula, Archiclematis, Campanella, Atragene, Tubulosae, Pseudanemone, Viorna

Some of these were previously classed as separate genera.

Description[edit | edit source]

Clematis have opposite (or in rare cases alternate), pinnately compound leaves, with the petioles often twining to support the plant. Flowers are borne solitary or in panicles, bell-shaped or flattened. Bisexual or sometimes unisexual, stamens many, carpels numerous. Sepals in 4s or 5s, petal-like, petals lacking. Stamens are petaloid in some species. Fruits are achenes, often with long, feathery styles. Stems contain an acrid sap, and the bark of wody species exfoliates in long strips.

Growing conditions[edit | edit source]

Deep, organic-rich soils. Most species need their root zones shaded during the growing season. Full sun to part shade.

Varieties[edit | edit source]

Uses[edit | edit source]

Maintenance[edit | edit source]

Young shoots are very delicate in the spring and brittle afterwards, so trellis structures should be installed during winter.

Propagation[edit | edit source]

Stratified seed, layering, division, cuttings, or in rare cases grafting

Harvesting[edit | edit source]

Pests and diseases[edit | edit source]

Crown Gall

Powdery Mildew

Leaf Spots

  • Cylindrosporium clematidis
  • Cercospora rubigo
  • Cercospora squalidula
  • Glomerella cingulata
  • Phyllosticta clematidis
  • Ramularia clematidis
  • Septoria clematidis

Leaf Blights

  • Phleospora adjusta


  • Ascochyta clematidina

Mushroom Rots


  • Puccinia pulsatillae
  • Puccinia recondita var. agropyri
  • Puccinia stromatica


  • Urocystis carcinoides










Gallery[edit | edit source]

References[edit | edit source]

  • Grey-Wilson, Christopher Clematis: The Genus : A Comprehensive Guide for Gardeners, Horticulturists and Botanists (Timber Press, 2000)
  • Johnson, Magnus The Genus Clematis (Magnus Johnson Plantskola AB, 2001)
  • Gardeners' Encyclopedia of Plants and Flowers, Christopher Brickell ed. (Dorling Kindersley, 1989)
  • Britton, Nathaniel Lord (1913). An Illustrated Flora of the Northern United States and Canada, Volume 2 (second edition ed.). Dover Publications, inc. pp. 121–126. {{cite book}}: |edition= has extra text (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)
  • Ann Fowler Rhoads and Timothy A. Block (2000). The Plants of Pennsylvania: An Illustrated Manual. Anna Anisko, illustrator. Morris Arboretum, University of Pennsylvania Press. pp. 572–574. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help)
  • Christopher Brickell and Judith D. Zuk (1997). The American Horticultural Society A-Z Encyclopedia of Garden Plants. DK Publishing. pp. 274–279. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help)
  • Staff of the L. H. Bailey Hortorium (1976). Hortus Third: A Concise Dictionary of Plants Cultivated in the United States and Canada. Cornell University Press. pp. 281–285. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help)
  • Pirone, Pascal P. (1978). Diseases & Pests of Ornamental Plants (Fifth Edition ed.). John Wiley & Sons, New York. p. 205. {{cite book}}: |edition= has extra text (help); Cite has empty unknown parameter: |coauthors= (help)
  • Cranshaw, Whitney (2004). Garden Insects of North America: The Ultimate Guide to Backyard Bugs. Princeton University Press. p. 588. {{cite book}}: Cite has empty unknown parameter: |coauthors= (help)
  • Pippa Greenwood, Andrew Halstead, A.R. Chase, Daniel Gilrein (2000). American Horticultural Society Pests & Diseases: The Complete Guide to Preventing, Identifying, and Treating Plant Problems (First Edition ed.). Dorling Kindersley (DK) Publishing, inc. p. 196. {{cite book}}: |edition= has extra text (help); Cite has empty unknown parameter: |coauthors= (help)CS1 maint: multiple names: authors list (link)