Clematis - texensis Etoile Rose

Clematis texensis Etoile Rose has smaller nodding blooms that flowers in abundance from july/aug to october time. It has hundreds of flowers on for this long late season. This is one of those clematis that is in deliberation amongst the heads of the 'clematis world' as to whether its a texensis or a viticella The Main attributes, such as the fact that it has 'Urn shaped' or 'Trumpet / flute shaped' flowers and the fact that they nod, along with the re-curved tepals are all common traits of the 'Texensis' species/group. But the fact that one of the parents is from the viticella group and the other is from the texensis group and that some of the buds do nod, would indicate that it is more part of the 'viticella' group. So we are unsure but by pure looks and habit alone we feel it needs to stay in our texensis group