Calvert, F. (Frederick) Crace', 1819-1873, Stenhouse, John, Groves, Charles Edward, 1841-1920 · Manchester : Palmer & Howe · leaf 267
f the lichens con-sists of a round or linear, convex or concave cup, calledapothecium, or shield, at first closed, but afterwards ex-panding and producing a disc or nucleus, in which thespores are embedded. The shield is surrounded by aborder, which originates either from the substance of… … Fig. 11. the colouring matter orchil, the varieties used for this pur-pose being found in warmer, and especially in tropicalclimates. The two principal species growing on the shores of thecountries already mentioned are the Roccella tinctoria andthe Roccella fiiciformis, which areimported and sold…
Dyes and dyeing · Calico-printing
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