Flora Medica

LICHENACEJE.STICTA.Thallus foliaceous, coriaceo-cartilaginous, spreading, lobed,free and downy beneath, with little cavities or hollow spots(cyphellae) often containing a powdery substance. Shields (scutella)beneath formed of the thallus, to which they are appressedand fixed by a central point, the disk coloured, plane, surroundedby an elevated border formed of the thallus.1331. S. pulmonacea Ach. syn. 233. Hooker B. F. ii. 206.Lichen pulmonarius E. Bot. t. 572. On the trunks of treesin mountainous countries, frequently investing them with its largeshaggy looking fronds.Thallus wide spreading, olive-green, pale brown when dry, pitted andreticulated, smooth or bearing powdery whitish warts in the reticulations,and frequently elongated, bearing scattered or tufted granules ; deeplylaciniated and broadly lobed and sinuated, beneath clothed with brownishdowny fibres, the swellings bare. Shields mostly marginal, red-brownwith a thick border. Employed in pulmonary affections ; its nutritiousproperties resemble those of Cetraria islandica. In Siberia it is usedfor giving a bitter to beer.PELTIDEA.Thallus foliaceous, coriaceous or membranaceous, spreading,lobed, with woolly veins beneath, the lobules fertile. Shields(peltae) suborbicular, adnate on the upper side of the lobules orproper portions of the thallus and having a border formed of thethallus.1332. P. aphthosa Ach. syn. 238. Hooker B. F. ii. 215.Lichen aphthosus E. Bot. 1. 1119. Moist shady alpine rocksamong moss, and generally near water.Thallus bright green, smooth, sprinkled with brown warts, and havingbroad rounded lobes, the fertile ones contracted, their sides reflexed.Shields large, ascending, red brown with a jagged border. Said to bepurgative, and anthelrninticĠYROPHORA.Thallus foliaceous, coriaceous or membranaceous, fixed bythe centre, peltate. Shields or (tricae gyromata) orbicular, subscutelliform,sessile and adnate, covered by a black membrane,the disk marked with concentric circles or plicae, with a borderof its own substance.1333. G. proboscidea Ach. syn. 64. E. Bot. t. 2484-. HookerB. F. ii. 217. Mountain rocks.Thallus simple, membranaceous, rugose, with elevated reticulations of626