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Melampsora lini (Ehrenb.) Desm. 1850

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Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. 1850

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Exotic
Present
New Zealand
Political Region

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(Ehrenb.) Desm.
Ehrenb.
Desm.
1850
no.2049
ICN
species
Melampsora lini

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Melampsora lini (Ehrenb.) Desm. 1850

Hosts : Linum monogynum Forst. On leaves and stems. Herb. Nos. 241, 297. II. York Bay (Wellington), E. H. Atkinson ! 24 Oct., 1920. II, III. Seashore, Seatoun (Wellington), E. H. Atkinson! 27 Jan., 1921. Linum monogynum Forst. var. chathamicum Cockayne. II. York Bay (Wellington), E. H. Atkinson ! 23 Jan., 1921.
0. Spermogones amphigenous, numerous, scattered, immersed, inconspicuous.
I. Caeomata amphigenous, chiefly hypophyllous, scattered, orbicular, 0.2-0.5 mm. diam., orange, pulverulent, surrounded by the ruptured epidermis. Spores subglobose, 20-28 mmm. diam.; epispore hyaline, finely and closely verruculose, 1 mmm: thick, cell-contents vacuolate, yellow.
II. Uredosori amphigenous and caulicolous, scattered or crowded, orbicular, 0.5 mm. diam., on stems elliptical and up to 2 mm. long, pulvinate, pulverulent, surrounded by the ruptured epidermis; mixed with numerous incurved, hyaline, capitate paraphyses. Spores subglobose, obovate or broadly. elliptical, 18-24 X 14-18 mmm.; epispore hyaline, closely and finely verruculose, 2 mmm. thick; germ-pores equatorial, obscure.
III. Teleutosori amphigenous and caulicolous, scattered or crowded, often confluent and up to 8 mm. long, irregular, discoid, reddish-brown, becoming shining-black, long covered. Spores laterally compacted, subepidermal, prismatic, unicellular, 40-55 X 9-15 mmm.; apex obtusely rounded or truncate, slightly (3 mmm.) or not thickened, base truncate; epispore smooth, brown, 1 mmm. thick; germ-pore obscure, apical.
Distribution: Europe; North and South America; Australia.
Both hosts are endemic; they are especially abundant along the sea-coasts. (Cheeseman, 1906, p. 86.)
The uredosori are common, and are conspicuous owing to their bright orange colour. The teleutosori appear to be rare here, as only a few sori have been found on the abundant material in hand.

Melampsora lini (Ehrenb.) Desm. 1850

This European rust species is recorded in New Zealand on the cultigen L. usitatissimum, on the introduced Australian weed species L. marginale, and on the endemic species L. monogynum. In a study of resistance of linen flax and linseed to rust, Cruickshank (1950) noted that Cunningham, as a result of a survey carried out in 1943-44, stated that rust was the most serious disease in New Zealand on linen flax. During World War II autumn and spring sowing of crops was introduced, and rust became widespread in these crops. Cruickshank (1951 a, 1952b), Cruickshank and Wright (1953), and Steveninck and Cruickshank (1956) noted the rust races present in New Zealand and listed resistant varieties of linseed and linen flax.

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Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. (1850)
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. (1850)
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. (1850)
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. (1850)
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. (1850)
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. (1850)
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. (1850)
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. (1850)
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. (1850)
Melampsora lini (Ehrenb.) Desm. 1850
Melampsora lini (Ehrenb.) Desm. (1850)

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Melampsora lini (Ehrenb.) Desm. 1850
Australia
Melampsora lini (Ehrenb.) Desm. 1850
Austria
Melampsora lini (Ehrenb.) Desm. 1850
Canada
Melampsora lini (Ehrenb.) Desm. 1850
Finland
Melampsora lini (Ehrenb.) Desm. 1850
Germany
Melampsora lini (Ehrenb.) Desm. 1850
India
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
Auckland
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
Chatham Islands
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
Coromandel
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
Kaikoura
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
Marlborough
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
Mid Canterbury
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
Nelson
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
North Canterbury
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
South Canterbury
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
Stewart Island
Melampsora lini (Ehrenb.) Desm. 1850
New Zealand
Wellington
Melampsora lini (Ehrenb.) Desm. 1850
Spain
Melampsora lini (Ehrenb.) Desm. 1850
United States

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1cb1925b-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
5 May 2021
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