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Australian Cultivar Registration Authority
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Descriptions of Registered Cultivars 
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Callistemon 'Harkness'

Syn:Callistemon'Harkness Hybrid', Callistemon 'Gawler' and Callistemon 'Gawler Hybrid'.

ORIGIN: Confusion has surrounded the origin of Callistemon 'Harkness' for many years. According to the person after whom it was named Mr GLJ Harkness of Gawler, SA "... it was obtained in 1937, and was purchased from Harris Scarfes Ltd; who were supplied by Kemp's Nurseries. It was received by me with approximately 25 other trees and shrubs... There were two Callistemons in this order, Callistemon lanceolatus (now Callistemon citrinus) and Callistemon coccineus (now Callistemon macropunctatus). Callistemon citrinus turned out to be the hybrid which is still growing on my property. The first plants from Callistemon 'Harkness' were propagated by me in 1948. It has never set seed and propagating was done from cuttings". (The above passage is taken from the SA SGAP Journal Page 3, January 1970). Cultivar received by the Authority: 1 May 1974. Applicant: Mr GLJ Harkness. Previously mentioned:"Australian Plants" Volume 3 page 349, September 1966.

DESCRIPTION: The leaves are entire and up to 130mm long by up to 12mm wide. The flowers are produced in long dense "bottlebrush" clusters. These clusters are produced in bunches of up to 11 "brushes". Individual "bottlebrushes" are red and up to 150mm long by about 55mm wide. The stamens are the colourful parts of the flower.

DIAGNOSIS: This cultivar is different from other Callistemon cultivars in its long dense and clustered red inflorescences.

COLOUR CODING: RHS Colour Chart, 1966 edition.

Stamens: red 52A