Australian Biological Resources Study
| Checklist of the Lichens of Australia and its Island Territories | ||
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References | ||
| Usnea bismolliuscula Zahlbr. | ||
| Cat. Lich. Univ. 6: 542 (1930); Usnea molliuscula Vain., Bot. Mag. (Tokyo)35: 45 (1921), nom. illeg., non U. molliuscula Stirt., Scott. Naturalist (Perth) 7: 77 (1883). T: Prov. Harima, Japan, 1916, A.Yasuda s.n.; holo: TUR-V. | ||
| Thallus subpendulous to shrubby-erect, 8–12 cm long, pale yellow-green; branching subdichotomous, irregular; trunk absent, with branches arising from the base; branches terete, 0.7–1.0 mm wide, inflated, sparsely perforate in basal region; apices tapered, sometimes forked; branchlets fusiform; fibrils rare, confined to basal region; papillae small, pointed. Isidia numerous, but often eroding to leave round to elongate pseudocyphellae; pseudocyphellae numerous, mainly on secondary branches, largest on branchlets and apices; soralia absent. Cortex matt, thin, soft. Medulla lax, sparse; axis 1/4 width of branch, hyaline. Apothecia uncommon, lateral or subterminal, to 5 mm diam.; disc concave to plane; fibrils sparse on margin; lower surface smooth. Ascospores 6.5–8.0 × 5 µm. CHEMISTRY: Cortex containing usnic acid. Medulla K+ yellow: stictic acid (major), constictic acid (minor or trace), cryptostictic acid (trace), menegazziaic acid (trace), ±diffractaic acid (minor), norstictic acid (trace), connorstictic acid (trace) and accessory scabrosin 4-acetate-4’-butyrate, scabrosin 4-acetate-4’-hexanoate, scabrosin 4,4’-dibutyrate, scabrosin 4,4’-diacetate, or rarely protocetraric acid only; medulla K+ yellow → red (rare): salazinic acid (major) and norstictic acid (major). This species produces diffractaic acid in the tropics. |  |
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| Found from north-eastern Qld to north-eastern N.S.W.; occurs from sea level (mangroves) to rainforest, open forest and on fence posts at elevations above 1000 m. Also in Japan, Taiwan and Papua New Guinea. | ||
| Stevens (2004) | ||
| Checklist Index |
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References |
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