Clematis L. Clematis flammula, L.

17. Clematis L. View in CoL 1

Woody climbers or perennial herbs. Leaves opposite, simple, ternate or 1- to 2-pinnate. Perianth-segments 4 (rarely 5, 6 or 8), petaloid, valvate. Honey-leaves absent; petaloid staminodes sometimes present. Stamens numerous. Achenes numerous; style persistent, often long and plumose. 1 Plant erect, not climbing; stems herbaceous, or woody at base only 2 Leaves simple; flowers deep violet or blue, very rarely white

9. integrifolia 2 Leaves pinnate; flowers white 3Leaves 1-pinnate; leaflets up to 9 cm 4. recta 3Leaves 2-pinnate (rarely 1-pinnate); leaflets 3-5 cm

5. pseudoflammula 1 Plant climbing or scrambling by means of tendrils; stems usually woody 4 Spathulate petaloid staminodes present 10. alpina 4 Petaloid staminodes absent 5Flowers blue, purple or violet-tinged; styles not plumose in fruit 6 Style glabrous; perianth-segments patent 7. viticella 6 Style pubescent in the lower |; flowers ± campanulate

8. campaniflora 5 Flowers white or yellowish, rarely reddish; styles plumose in fruit

7 Flowers nodding; bracteoles connate, forming a 2-lipped involucre beneath the flower 6. cirrhosa

7 Flowers erect; bracteoles free, not forming an involucre

8 Stamens ciliate; leaves glaucous 3. orientalis

8 Stamens glabrous; leaves not glaucous

9 Leaves 1-pinnate; perianth-segments tomentose on both surfaces 2. vitalba

9 Leaves 2-pinnate; perianth-segments glabrous on upper surface 1. flammula

Sect. Clematis . Bracteoles free; flowers white or yellowish, usually numerous, in large panicles; staminodes absent; styles plumose in fruit.

1. C. flammula L. View in CoL , Sp. Pl. 544 (1753) View Cited Treatment .

A more or less woody deciduous climber 3-5 m. Leaves 2-pinnate; leaflets narrowly oblong to suborbicular, entire or 3-lobed. Flowers c. 2 cm in diameter, fragrant. Perianth-segments obtuse, pubescent beneath and on the margins. Anthers 3-4 mm. Receptacle thinly puberulent to glabrous. Achenes strongly compressed. 5. Europe. Al BI Bu Cr G a G r Hs It Ju Lu Sa Tu [Cz Hu].

2. C. vitalba L. View in CoL , Sp. Pl. 544 (1753) View Cited Treatment .

A deciduous woody climber up to 30 m. Leaves 1-pinnate; leaflets ovate, rarely linear-lanceolate, dentate or subentire. Flowers c. 2 cm in diameter, fragrant. Perianth-segments obtuse, greenish-white, pubescent on both surfaces. Anthers 1-2 mm. Receptacle pubescent. Achenes scarcely compressed. S., W. & C. Europe. Al Au Be Br Bu Co Cz G a Ge G r He Ho Hs Hu It Ju Lu Rm Rs (K) Sa Si Tu [Hb N o Po Su].

3. C. orientalis L. View in CoL , Sp. Pl. 543 (1753) View Cited Treatment .

Like 2 but leaflets oblong or linear, 3-lobed, often dentate, glaucous. Perianthsegments acuminate, yellowish. Stamens ciliate. S.E. Russia and Ukraine; Aegean region (Tinos). G r Rs (K, E). [Cz.]