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Published In: Species Plantarum 1: 543. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Contributor Text: HARALD RIEDL and YASIN J. NASIR
Contributor Institution: Naturhistorisches Museum, Botanische Abteilung, Wien, Austria.

and

National Herbarium, Pakistan Agricultural Research Council, Islamabad, Pakistan.

General/Distribution: A genus of c. 250 cosmopolitan, but chiefly temperate species. Species with petaloid filaments or staminodes are sometimes separated in subgenus Atragene L.
Comment/Acknowledgements: Several species as Clematis hybrida Hort. and Clematis flammula L. are cultivated in gardens for their ornamental value. No poisonous plants are known in Clematis. Represented in Pakistan by 10-11 species.

 

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Climbing to erect shrubs, perennials rarely annuals. Leaves opposite, ternately or pinnately divided. Flowers solitary (-2-4) in fascicles or in paniculate cymes. Sepals 4-8, petaloid. Petals absent but filaments or staminodia sometimes petaloid. Stamens numerous. Carpels forming a small subglobose head. Ovules solitary, pendulous. Style often much elongating after flowering, plumose-hairy.
 

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1.Leaves pinnate, with very small lateral leaflets and much longer, simple, terminal leaflets
1.Leaves ternate to pinnate with ± equal leaflets
2.Leaflets linear-lanceolate to narrowly ovate, never cordate at base, sometimes distinctly lobed with entire lobes
3.Flowers single on long pedicels. Corolla-l ike sepals yellow, at least 3 cm long
4.Filaments dilated, petaloid, but always bearing fertile anthers
 Clematis robertsiana
4.Petaloid staminodes present
 Clematis alpina var. sibirica
3.Flowers in panicles or few-flowered fascicles, not distinctly corolla-l ike, sepals white or pale yellow, less than 3 cm
5.Filaments longer than anthers
 Clematis graveolens
5.Filaments shorter than anthers
 Clematis orientalis
2.Leaflets with cordate base or ± broadly ovate, grossly dentate, rarely entire or lobed with a few grossly dentate lobes
6.Leaves ternate. Flowers single or in fascicles on long pedicels
7.Sepals white to yellowish-white, obtuse to subacute, oblong to ovovate. Anthers glabrous
 Clematis montana
7.Sepals violet outside, narrower, acute to sub-acute. Anthers slightly bearded
 Clematis barbellata
6.Leaves pinnate or bi-pinnate
8.Leaflets leathery, ± riged, often shiny on the upper surface. Flowers densely paniculate
 Clematis gouriana
8.Leaflets neither leathery nor rigid
9.Sepals 6-8 (-10) mm long, horizontally spreading
 Clematis grata
9.Sepals 10-20 mm long-erect, curved backwards at the tips
10.Sepals with ± parallel ribs, 15-20 mm long
 Clematis buchananiana
10.Sepals without ribs, 10-12 mm long
 Clematis connata
 
 
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