A distinct cultivar of Coreopsis plant named `Walcoreop`, characterized by its uniform, spreading and compact growth habit; moderate to rapid growth rate; moderate to high vigor; large inflorescences that are saucer-shaped; numerous inflorescences that flower continuously throughout the flowering season; bright yellow ray and disc florets; long, narrow ray florets; long, narrow bracts; and good garden performance.

The present invention relates to a new and distinct cultivar of garden 
Coreopsis plant, botanically known as Coreopsis grandiflora and referred 
to by the cultivar name Walcoreop and known by the trade name Flying 
Saucers. 
The new cultivar is a product of a planned breeding program conducted by 
the inventor in Walburton, Arundel Sussex, United Kingdom. The objective 
of the breeding program as to create new garden Coreposis cultivars having 
uniform plant habit, good vigor, large inflorescences and abundant flowers 
throughout the flowering season. 
The new cultivar originated from a series of self-pollinated crosses made 
by the inventor of plants of the species Coreopsis grandiflora starting in 
1980. Seed derived from the best progeny were sown in 1991 and the new 
Coreopsis was selected from the best of these seedlings in 1992 in a 
controlled environment in Walburton, Arundel, Sussex, United Kingdom. 
Asexual reproduction of the new cultivar by terminal cuttings taken at 
Walburton, Arundel, Sussex, United Kingdom, has shown that the unique 
features of this new Coreopsis are stable and reproduced true to type in 
successive generations. 
The following traits have been repeatedly observed and are determined to be 
unique characteristics of `Walcoreop`. These characteristics in 
combination distinguish `Walcoreop` as a new and distinct cultivar: 
1. Uniform, speading and compact growth habit. 
2. Moderate to rapid growth rate and moderate to high vigor. 
3. Large inflorescences that are slightly cupped upwards or saucer-shaped. 
4. Numerous inflorescences that flower continuously throughout the 
flowering season. 
5. Bright yellow ray and disc florets. 
6. Long, narrow ray florets. 
7. Long, narrow bracts. 
8. Good garden performance. 
The cultivar Walcoreop has not been observed under all possible 
environmental conditions. The phenotype may vary somewhat with variations 
in environment such as temperature, daylength and light intensity, 
without, however, any variance in genotype. 
Plants of the new Coreopsis can be compared to plants of the nonpatented 
cultivar Badengold. However, in side-by-side comparisons conducted in 
Walburton, Arundel, Sussex, United Kingdom, under outdoor summer 
conditions, plants of the new Coreopsis differed from plants of the 
cultivar Badengold in the following characteristics: 
1. Plants of the new Coreopsis are more compact, denser and more spreading 
than plants of the cultivar Badengold. 
2. Plants of the new Coreopsis are more freely branching than plants of the 
cultivar Badengold. 
3. Stems of plants of the new Coreopsis are glabrous or have minute hairs 
whereas stems of plants of the cultivar Badengold are pubescent with hairs 
1 to 2 mm in length. 
4. Leaves of plants of the new Coreopsis are narrower than plants of the 
cultivar Badengold. 
5. Plants of the new Coreopsis flower from June through October whereas 
plants of the cultivar Badengold only flower until about August in the 
Northern Hemisphere. 
6. Ray florets of plants of the new Coreopsis are slightly longer and 
narrower than ray florets of plants of the cultivar Badengold. 
7. Plants of the new Coreopsis have shorter peduncles than plants of the 
cultivar Badengold. 
8. Bracts of plants of the new Coreopsis are twice as long as bracts of 
plants of the cultivar Badengold. 
Plants of the new Coreopsis can also be compared to plants of the 
nonpatented cultivar Pot of Gold. However, in side-by-side comparisons 
conducted in Walburton, Arundel, Sussex, United Kingdom, under outdoor 
summer conditions, plants of the new Coreopsis differed from plants of the 
cultivar Pot of Gold in the following characteristics: 
1. Plants of the new Coreopsis are usually shorter and more spreading than 
plants of the cultivar Pot of Gold. 
2. Plants of the new Coreopsis are more freely branching than plants of the 
cultivar Pot of Gold. 
3. Stems of plants of the new Coreopsis are glabrous or have minute hairs 
whereas stems of plants of the cultivar Pot of Gold are pubescent with 
hairs about 1 mm in length. 
4. Plants of the new Coreopsis flower from June through October whereas 
plants of the cultivar Pot of Gold only flower until about August in the 
Northern Hemisphere. 
5. Ray florets of plants of the new Coreopsis are slightly longer and 
narrower than ray florets of plants of the cultivar Pot of Gold. 
6. Plants of the new Coreopsis have shorter, but stronger peduncles than 
plants of the cultivar Pot of Gold. 
7. Bracts of plants of the new Coreopsis are twice as long as bracts of 
plants of the cultivar Pot of Gold. 
A detailed comparison of plants of the new Coreopsis and the cultivars 
Badengold and Pot of Gold appears in Chart A at the end of the 
specification.