Niebla siphonoloba is a fruticose lichen that grows on rocks along the foggy Pacific Coast of North America, in the Channel Islands (Santa Cruz Island), and from Bahía de San Quintín, Baja California to the Vizcaíno Peninsula.

Niebla siphonoloba is distinguished by a thallus divided into relatively few—less than 20–branches from a pale rusty orange pigmented holdfast, the branches generally cylindrical, stubby, oblong to linear in outline,[2] to 5 cm long and 1.5–3(-5) mm wide, most simple, some branched above the middle, more frequently branched near apex in thalli on Santa Cruz Island, short wavy (sinuous) along marginal and intermarginal cortical ridges, occasionally with short rounded lobes, especially near apex, and by containing sekikaic acid, with triterepenes.

[1] Apothecia appear terminal and subterminal on branches, often clustered, especially thalli on Santa Cruz Island.

Niebla siphonoloba was recognized as a result of undertaking a taxonomic revision of the genus in regard to developing a lichen flora of Baja California, which began in 1986.

[1] It was first recognized from specimens collected on the Vizcaíno Peninsula near Arroyo San Andrés, 15 May 1986, the type (biology), Spjut 9699, deposited at the United States National Herbarium (Smithsonian Institution, Museum of Natural History, Botany Department), and at the Universidad Autónoma de Baja California, Ensenada, Mexico.