Plants with the common name 'Threetooth horkelia'
Horkelia tridentata Threetooth horkelia
Horkelia tridentata subsp. flavescens Threetooth horkelia
Horkelia tridentata subsp. tridentata Threetooth horkelia
If you are planting Clematis on a trellis, why not plant 2 different cultivars. These can be cultivars which flower at the same time to contrast colour or form, or they can be an early and late cultivar to extend your season.
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