Imported: 12 Feb '17 | Published: 14 Jul '15
USPTO - Plant Patents
A Pittosporum tenuifolium plant particularly distinguished by grey green leaves with irregular white margins; compact and spherical plant form; vigorous growth habit and freely basal branching habit, a dense and bushy plant.
Genus and species: Pittosporum tenuifolium.
Variety denomination: ‘Silver Ball’.
The present invention relates to a new and distinct cultivar of Pittosporum tenuifolium hereinafter referred to by the cultivar name ‘Silver Ball’ or the ‘new plant’. ‘Silver Ball’ is a spontaneous sport from Pittosporum tenuifolium ‘Golf Ball’ (U.S. Plant Pat. No. 15,329); discovered and selected by the inventor in an ornamental plant nursery in Napier, Hawkes Bay, New Zealand in August 2008; and propagated from soft wood cuttings in the same nursery.
The new plant has been asexually propagated by softwood cuttings and the unique characteristics of the new plant have been found to be reproducible and stable in successive generations of asexually reproduced plants. The resultant plants have been found to be identical to the original selection.
Plant Variety Rights application for ‘Silver Ball’ was filed in New Zealand on 12 Sep. 2012 and assigned application number SHM319. ‘Silver Ball’ has not been sold or made publicly available, more than one year prior to the filing of this application.
The following are the most outstanding and distinguishing characteristics of the new plant when grown under normal horticultural practices in Napier, New Zealand:
The following detailed description sets forth the distinctive characteristics of ‘Silver Ball’. The following observations, measurements and values describe the new cultivar at 24 months of age as grown in an outdoor nursery in Napier, New Zealand under conditions which closely approximate those generally used in commercial practice. During the production of the plants, day temperatures ranged from 10 degrees Celsius to 32 degrees Celsius and night temperatures ranged from 0.1 degrees Celsius to 15 degrees Celsius. Plants were grown in 170 mm containers and very lightly pruned to maintain the plant's symmetry.
Colour readings were taken under natural light. Color references are primarily to The 1995 Edition of The Colour Chart of The Royal Horticultural Society of London (R.H.S.), except where general colors of ordinary significance are used.
When compared to the commercial variety ‘Elfin’ (U.S. Plant Pat. No. 21,822) ‘Silver Ball’ has grey green leaves with irregular white margins, whereas ‘Elfin’ has light green leaves.
When compared to the commercial variety ‘Little Burger’ (unpatented); ‘Silver Ball’ is more symmetrical and sphere shaped and has grey green leaves with irregular white margins, whereas ‘Little Burger’ has a flatter, spreading habit and mid green leaves.
When compared to the parent sport ‘Golf Ball’ (U.S. Plant Pat. No. 15,329); ‘Silver Ball’ has grey green leaves with irregular white margins, whereas ‘Golf Ball’ has dark green leaves.