This is an historical and descriptive account of 28 herbarium specimens, 27 lichens and an alga, found in the archives of Charles Chalcraft, a descendant of the Bedford family, who were dye manufacturers in Leeds, England, in the 19th century. The lichens comprise 13 different morphotypes collected in the Canary Islands and West Africa by the French botanist J. M. Despréaux between 1833 and 1839. The collections include samples of "Roccella fuciformis", "R. phycopsis" and "R. tinctoria" (including the fertile morphotype "R. canariensis"), "Ramalina crispatula" and "R. cupularis", two distinct morphotypes of "Sticta", "S. canariensis" and "S. dufouri", "Physconia enteroxantha", "Pseudevernia furfuracea var. ceratea" and "Pseudocyphellaria argyracea". The herbarium also includes authentic material of "Parmotrema tinctorum" and a probable syntype of "Seirophora scorigena". Most of these species are known as a source of the purple dye orchil, which was used to dye silk and wool.

中文翻译：

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JM Despréaux 来自加那利群岛和西非的地衣：英国档案馆中发现的 19 世纪藏品

这是对 19 世纪英格兰利兹的染料制造商贝德福德家族的后裔查尔斯·查克拉夫特 (Charles Chalcraft) 档案中发现的 28 个植物标本馆标本、27 个地衣和一种藻类的历史和描述性描述。地衣包括 13 种不同的形态类型，由法国植物学家 JM Despréaux 于 1833 年至 1839 年间在加那利群岛和西非收集。收藏品包括“Roccella fuciformis”、“R. phycopsis”和“R. tinctoria”（包括可育形态型“R. canariensis”）、“Ramalina creamtula”和“R. cupularis”，两种不同的形态型“Sticta”、“S. canariensis”和“S. dufouri”、“Physconia enteroxantha”、“Pseudevernia furfuracea var. ceratea “ 和 ”