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 Uredo phormii
SynonymsMelampsora sp.
BiostatusPresent in region - Indigenous. Endemic
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Caption: FIG. 118. Uredo Phormii G.H. Cunn. Uredospores from Phormium tenax Forst. |
Article: Dingley, J.M. (1969). Records of plant diseases in New Zealand. New Zealand Department of Scientific and Industrial Research, Bulletin 192: 298 p. Wellington:.
Article: Cunningham, G.H. (1924). The Uredinales, or rust-fungi, of New Zealand: supplement to Part 1; and Part 2. Transactions and Proceedings of the New Zealand Institute 55: 1-58 Wellington:.
Description: II. Uredosori hypophyllous, seated on discoloured spots visible on the upper surface, scattered
or more commonly crowded into irregular groups often covering the entire under-surface of
the leaf, elliptical, l mm. long; or confluent and up to 6 min. long, ferruginous, bullate,
pulverulent, surrounded and partially covered by the ruptured epidermis. Spores obovate,
elliptical, or subglobose, 21-30 X 1.7-22 mmm.; epispore golden-brown, coarsely and
sparsely echinulate, 2.5-3 mmm. thick, cell-contents brown, granular; germ-pores scattered;
3-5, commonly 3, conspicuous.
Notes: Both hosts are indigenous, the former being common throughout, and extending to Norfolk
Island, whilst the latter is endemic. (Cheeseman, 1906, p. 716.)
This rust is characterized by the small spores, coloured coarsely and, sparsely echinulate thick
epispore, and conspicuous scattered germ-pores. Severely infected leaves are useless for
milling purposes.
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