Northwest Lichenologists

Usnea booklet now available

17 Nov 2018 7:20 PM | Bruce McCune (Administrator)

We have a new offering from NW Lichenologists, a handy, compact guide to Usnea in our region.

See below for a general description and the Store section of the NWL website for more details. Note also that we have a limited time discount if you order the 2019 calendar and the booklet together.



Usnea in the Pacific Northwest,  Aide Mémoire

by Daphne Fisher Stone, illustrated by Hannah Wilson and Rachel Werling

ISBN: 978-0-9790737-3-1 (pbk.)

Cost: $12 per copy + $3 for domestic shipping and handling for 1-10 copies. (For example, 3 copies would be 3 * $12 + $3 = $39. One copy is $15 including shipping.

Inspired by an "Aide Mémoire" booklet produced by the British Lichen Society, this booklet provides a compact reference to Usnea in the Pacific Northwest with black and white line drawings, identification tips, and more. It should be useful to professionals and beginners alike. At the top of each page is a general statement about where the species is found in the Pacific Northwest. Each page shows several sketches. At the top left is an “icon” intended to show the general growth form. The icons used are tufted and bushy; pendulous without fibrils; pendulous with fibrils; and several with a special form or coloration, including Usnea lambii, U. longissima, and U. silesiaca. On the top right is an illustration of a large branch, cut in half lengthwise and also cut across the branch. This shows the relative thickness of the cortex (C), medulla (M), and axis (A), a useful tool for identification. Below the first two sketches are one or two sketches showing characters on main and secondary branches. A few words indicate characters that are typical of the species, such as soralia shape, isidia, papillae, and dents in the main branches. You may notice that on most species I do not describe branching patterns. This is because most Usnea thalli that are collected are not perfect, mature thalli, so branching patterns are not usually obvious. The bottom of each page lists similar species and some differences between them and the highlighted species. At the end of the booklet is an illustrated glossary.

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