Labellum

Definition and stakes

Portrait of Charles Darwin Charles Darwin,  The Various Contrivances by which Orchids are Fertilised by Insects (1877)

“ But as the column of Spiranthes after a time moves from the labellum, leaving a free passage for the introduction of the pollinia, so here the rostellum moves backwards, and not only recovers its former arched position, but stands upright, leaving the stigmatic surface, now rendered more adhesive, perfectly free for pollen to be left on it. The pollen-masses, when once cemented to an insect's forehead, will remain attached to it, until they are brought into contact with the stigma of a mature flower ”
Source: Wikisource

Henry B. Wheatley,  How to Make an Index

“ I know well that I shall be told that I am out of date, that such an opinion is as the voice of one crying in the wilderness—that the dictionary catalogue has won its battle—but even so, perhaps the more so, do I feel it the part of a serious and immovable conviction to declare my belief that—for student and librarian alike—this twofold catalogue, author and subject each in its own division, is the best catalogue a library can have, and that the dictionary catalogue is the very worst. ”
Source: Gutenberg

Portrait of Charles A. Cutter Charles A. Cutter,  Rules for a Dictionary Catalogue

“ There are thousands of possible matters of investigation, some of which are from time to time discussed, but before the catalogue can profitably follow its “specific” rule in regard to them they must attain a certain individuality as objects of inquiry, and be given some sort of name, otherwise we must assign them class-entry.
And it is not always easy to decide what is a distinct subject. Many catalogues have a heading Preaching. Is Extempore preaching a sufficiently distinct matter to have a heading of its own?
”
Source: Gutenberg

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