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Melampsoridium betulinum Kleb., Z. Pflanzenkrankh. 9 17 (1899)
Melampsoridium betulinum Kleb. 1899

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Exotic
Present
New Zealand
Political Region

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Kleb.
Kleb.
1899
17
ICN
Melampsoridium betulinum Kleb. 1899
species
Melampsoridium betulinum

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Melampsoridium betulinum Kleb. 1899

Host: Betula alba L. On leaves. Herb. No. 596. II, III. Hanmer (Canterbury), W. Morrison! 2 March, 1922.
0. Spermogones amphigenous, numerous, scattered, flattened, inconspicuous.
I. Aecidia hypophyllous, solitary, or in rows parallel to the midrib, reddish-orange. Peridia elliptical, up to 1 mm. high, 1 mm. long, margin irregularly torn, tinted. Spores subglobose or elliptical, 16-25 X 12-16 mmm.; epispore hyaline, minutely and closely verruculose, 1-1-5 mmm. thick, slightly thinner and more smooth on one side.
II. Uredosori hypophyllous, immersed, scattered, orbicular, 0.1 mm. diam. Peridia flattened-globose, dehiscing by an apical pore. Spores elliptical or subclavate, 20-35 X 10-15 mmm.; epispore hyaline, sparsely and somewhat coarsely echinulate, smooth towards the apex, 1 mmm. thick; germ-pores indistinct.
III. Teleutosori hypophyllous, immersed, scattered, orbicular, 0.5 mm. diam., chestnut-brown, indehiscent. Spores compacted into a flattened crust, prismatic, 35-45 X 10-15 mmm.; apex and base obtusely rounded; epispore tinted brown, smooth, 1 mmm. thick; germ-pore indistinct.
Distribution: Europe; Asia; North America.
The host is an introduced species, The aecidia occur on Larix spp. Plowright (1890) first worked out the connection between the aecidium on Larix and the uredo- and teleutospores on Betula. The teleutospores germinate the season following their production.

Melampsoridium betulinum Kleb. 1899

Both host and rust are introduced; the host is a common cultigen occasionally grown in the South Island in plantations. Herbarium records at Plant Diseases Division show That on Betula pendula the uredospore stage was common throughout New Zealand: the aecidial stage on Larix has not been collected in New Zealand.

Melampsoridium betulinum Kleb. 1899

Type: Rust and Smut Fungi; Description: Uredinia solitary, scattered, circular, yellow, 0.1–0.2 mm in diameter, in orange spots; on the lower surfaces of leaves. Urediniospores ellipsoid or subclavate, 20–35 × 10–17 μm, sparsely echinulate but smooth at the apex. Telia solitary, scattered, circular, brown to dark chestnut brown, up to 0.5 mm in diameter; on the lower surfaces of leaves. Teliospores in a palisade-like layer, prismatic, rounded at both ends, 35–45 × 10–15 μm, tinted brown.
Distribution: Auckland, Waikato, Taupo, Wanganui, Hawkes Bay, Nelson, Buller, Marlborough, North Canterbury, Mid Canterbury, Dunedin, Southland.; 1st Record: Robinson (1919: as Melampsoridium betulinae).
Significance: Severe infection may lead to premature defoliation. This rust is very common but seldom causes any significant damage. The aecial stage has not been recorded on Larix in New Zealand.; Host(s): Betula pendula.

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Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)
Melampsoridium betulinum Kleb. 1899
Melampsoridium betulinum Kleb. (1899)

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Melampsoridium betulinum Kleb. 1899
[Not available]

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1cb19275-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2001
2 July 2001
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