Английская Википедия:Hypogymnia krogiae
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Hypogymnia krogiae, commonly known as the freckled tube lichen,[1] is a species of foliose lichen in the family Parmeliaceae. Found in North America, it was described as a new species in 1973 by Karl Ohlsson. The type specimen was collected near Cheat Bridge, West Virginia by Mason Hale in 1956.[2]
Description
The lichen has a greenish-gray thallus measuring up to Шаблон:Convert in diameter. The thallus comprises individual overlapping lobes that are Шаблон:Convert wide, with slightly upturned edges on the marginal lobes. The thallus undersurface is dark brown to black and wrinkled, but becoming lighter-colored near the lobe tips. Apothecia (sexual fruiting bodies) are common on the thallus surface; they are on a small stalk (stipitate), have a brown disc and are 2.0–3.0 mm wide. The ascospores number 8 per ascus and measure 4.0–6.0 μm. Hypogymnia krogiae contains the secondary compounds atranorin, chloroatranorin, physodic acid, physodalic acid, and trace amounts of protocetraric acid.[2] The expected results for standard chemical spot tests on the medulla are PD+ (red), K−, KC+ (pink), and C−.[1]
Hypogymnia krogiae reproduces by sexual means (via the apothecia) and does not have any soredia. It has a sorediate counterpart, Hypogymnia incurvoides, which is also found in North America. This pair is one of three such fertile/sorediate species pairs in the genus Hypogymnia.[3]
Habitat and distribution
Hypogymnia krogiae occurs in eastern North America from Tennessee and North Carolina, north to Quebec in Canada.[2] It is a corticolous lichen, and grows on fir and spruce trees in both open and shaded forests.[1]
References
- Английская Википедия
- Hypogymnia
- Lichen species
- Lichens described in 1973
- Lichens of Eastern Canada
- Lichens of the United States
- Fungi without expected TNC conservation status
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