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 Thallus: filamentous-fruticose, branches terete, pointed, forming appressed or loosely attached, ±irregularly shaped rosettes, 5-10 mm in diam.; filaments: old and basal parts 75-125 µm wide with rows of large, roundish mycobiont cells, 5-15 x 5-10(-15) µm wide; younger parts and side branches (25-)50 µm wide with short-celled, rectangularly arranged hyphal cells, 2.5-5 x 2-3 µm wide; upper surface: blackish blue-green or brown, dull, lobes finely granulose with few short, spinule-like side branches; isidia: absent, but short side branches may appear isidia-like; lower surface: concolorous with upper surface, attached by small, sometimes pale green gelatinous holdfasts; Apothecia: not seen in the Arizona material and not reported from the Colorado samples (Henssen 1963), elsewhere ±sessile, lateral, up to 0.2 mm wide, with a persisting thalline margin; proper exciple: present; asci: cylindrical, thin walled, IKI-, 16-spored; ascospores: simple, hyaline, ellipsoid, 7-11 x 3.5-7 µm; Pycnidia: not seen in the Arizona material; conidia: small, bacilliform, 1.5-3 x 1 µm; Spot tests: all negative; Secondary metabolites: none detected.; Substrate and ecology: on sandstone in moist habitats; World distribution: North America, Tanzania, China, Papua New Guinea, and New Zealand; Sonoran distribution: central Arizona at intermediate elevations in the mountains.; Notes: Ephebe perspinulosa is quite similar, but forms more erect tufts and has branches with numerous short side-branchlets. The anatomy in old branches consists of a loose paraplectenchyma of small fungal cells. Ephebe hispidula, like E. perspinulosa, has numerous side branchlets. The main branches are more robust (100-220 µm wide) having a reticulate hyphal pattern with elongated and roundish cells. Thalli of Ephebe lanata (L.) Vain. differ in its combed appearance, in the presence of a central strand of elongated hyphae in basal branches and elongated, ±collar-like hyphae in the tips. For separation from other dwarf-fruticose cyanobacterial lichens see genus notes. 


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© Lichen Unlimited: Arizona State University, Tempe.

Source: Lichen Flora of the Greater Sonoran Desert Region

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