. Una guida allo studio dei licheni, meno distintivamente meridionali nel theirrange. Il cambiamento in simbiont algale può avere en-abilitato le piante per prosperare in un clima più freddo. Theysuccedere su rocce e alberi. 1. Stitta amplissima. Thallus grande, parmelioide, piuttosto sottile e papato, lobato, verde-grigiastro e liscio sopra; marrone sotto, con rizoidi ma nocifellae. Apothecia piuttosto grande, numerosa. Castagno-marrone. Spore incolore, lunghe, sottili, curve, septate indistintamente, 46/x X 6/x. 2. Stitta pulmonaria. Thallus grande, lobi lunghi, superficie superiore divisa in aree concave, creste e margine

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. A guide to the study of lichens. less distinctively southern in theirrange. The change in algal symbiont may have en-abled the plants to thrive in a colder climate. Theyoccur upon rocks and trees. 1. Sticta amplissima. Thallus large, parmelioid, rather thin and papery, lobed, grayish-green andsmooth above; brown beneath, with rhizoids but nocyphellae. Apothecia rather large, numerous. Diskchestnut-brown. Spores colorless, long, slender, some-what curved, indistinctly septate, 46/x X 6/x. 2. Sticta pulmonaria. Thallus large, lobes long, upper surface divided into concave areas, ridges andmargin lined with soralia, dirty brown tinged withbluish-green; lower surface of convex areas light-brown, no cyphellae. Apothecia few, medium. Diskreddish-brown to dark. Spores very closely resemblethose of Arthonia, 18/x X 5.5/x. This lichen quite generally occurs at the base ottrees (weather-side) at high altitudes. It is usuallyisolated, and the entire plant has the appearance ofbeing decrepit and old, so that upon seeing it for the. ILATK II. FolinstTypes, tliallus nearly Iliiin-. , StictajiuliitoHKrid. tr.iiii Mt. Tanialpais, .Marin (it., (alifornia..», iliiliiliairia jtustulata, from California Aeadeuiy ofScience. GENERA AND SPECIES. 199 first time one is likely to pass it by hoping to find abetter specimen. This lichen was at one time much prized as aremedial agent and in the dyeing industry. Its specificname as well as its familiar desis^nation luniks of oakor * tree lungwort is due either to its efficacy, real orsupposed, in pulmonary affections, as a nutrient, de-mtflcent or tonic; or from a fancied resemblance be-tween the reticulate character of the thallus and themesh-like structure of lungs. The Swedish peasantrywere wont to employ it in epidemic catarrh of cattle, especially of sheep; and in Germany, probably forsimilar purposes, it was given to cattle mixed withsalt. — Lindsay. Library LICHENES IMPERFECTI OR FALSE LICHENS. Formerly various lichens and parts of lic

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• bookcentury1900
• bookdecade1900
• bookidguidetostudy
• bookyear1904