766 Parmotrema hypotropum (Nyl.) Hale Thallus grey, loosely adnate, ciliate, usually distinct white maculate. Soredia granular, linear, marginal to submarginal. Isidia absent. Medul- la white. Lower surface black, with broad brown to mottled white zone peripherally. Chemistry: cortex K+ yellow, C-, KC-, P-; medulla K+ yellow>orange, C-, KC-, P+ orange; atranorin, chloroatranorin, nor- stictic acid (maj), connorstictic acid (min). USA, Europe (unknown from Asia?). Note: Similar to Parmotrema hypoleucinum (Steiner) Hale and only different by chemistry. [16779], USA, Mexico, Baja California Sur, along Rte 22, 21 km W of Ciudad Contitución, 24°59’ N, 111°51’ W, 30 m, southern Magdalena Region of the Sonoran Desert, on Jatropha. Leg. T.H. Nash III, 8 Jan. 1989 (Nr. 26,026), det. T.H. Nash III.
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766
Parmotrema hypotropum (Nyl.) Hale
Thallus grey, loosely adnate, ciliate, usually distinct white maculate.Soredia granular, linear, marginal to submarginal. Isidia absent. Medul-la white. Lower surface black, with broad brown to mottled white zoneperipherally. Chemistry: cortex K+ yellow, C-, KC-, P-; medulla K+yellow>orange, C-, KC-, P+ orange; atranorin, chloroatranorin, nor-stictic acid (maj), connorstictic acid (min). USA, Europe (unknownfrom Asia?). Note: Similar to Parmotrema hypoleucinum (Steiner) Haleand only different by chemistry.
[16779], USA, Mexico, Baja California Sur, along Rte 22, 21 km W ofCiudad Contitución, 24°59’ N, 111°51’ W, 30 m, southern MagdalenaRegion of the Sonoran Desert, on Jatropha. Leg. T.H. Nash III, 8 Jan.1989 (Nr. 26,026), det. T.H. Nash III.
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