Variety traits
Inflorescence of Rudbeckia hirta
Rudbeckia hirta L.
The inflorescence of Rudbeckia hirta is a solitary head (capitulum), the key morphological parameters of which are diameter (from 7 to 18 cm), degree of double-floweredness, and the structure of the central cone composed of disc florets.
In the reference 26 varieties crop Black-eyed Susan, where this is mentioned in the description.
The inflorescence of Rudbeckia hirta is situated at the apex of a long peduncle. In breeding practice, characterization of the shape involves the head diameter, the type of double-floweredness defined by the number of ray florets, and the degree of convexity of the central disc consisting of tubular florets.
Inflorescence traits are definitive for varietal identification and commercial assessment. Large heads with a diameter of 10–15 cm possess high ornamental value, while the stability of the shape and the size of the inflorescences serve as the primary criteria when selecting varieties for landscape design and commercial cut flower production.
General information about the subject — on the page Inflorescence.
Varieties of Black-eyed Susan mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
No varieties yet.