File:The orchids of New England; a popular monograph (1884) (20617633160).jpg

Title: The orchids of New England; a popular monograph
Identifier: CUbiodiversity465857 (find matches)
Year: 1884 (1880s)
Authors: Baldwin, Henry, 1846-1911
Subjects: Orchids
Publisher: New York, J. Wiley
Contributing Library: Cornell University Library
Digitizing Sponsor: Mann Library, Cornell

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THE ORCHIDS OF NEW ENGLAND. 41
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of the other species, is curved upwards, so that the front of the flower is made somewhat tubular, and is divided into halves. Thus a moth is compelled to go to the one or other side, and its face will almost certainly be brought into contact with one of the discs. Professor Gray has seen a butterfly from Canada with a pollen-mass of this species attached to each eye." If. Hookeri has. the muskiness characteristic of the family but no "strong, sweet odor," such as is at- tributed to //. chlorantha. A variety, oblongifolia, oc- curs in New York State, differing, as the adjective imolies Simolv in the ^IG' 9"~~Habenaria chlorantha. (From Darwin.) A. Front view of flower, a, a, anther-cells ; d, disc ; Shape Of the leaves. ny nectary; n', entrance to nectary ; /, labellum ; j, 1 he first time I analyzed b. A pollinium (this has hardly a sufficiently elon- a flower Of Hooker's f^ed appearance). The drum-like pedicel is hidden behind the disc. Habenaria I Was Struck C- Dia&ram giving a section through the viscid disc, the drumJike pedicel and the attached end of the With the prominent beak caudicle. The disc is formed of an upper mem- brane, with a layer of viscid matter beneath. between the bases Of the D. Side view of flower of H. Hookeri. anther-cells. " In both divisions of the Ophreae," Darwin says, " namely the species having naked discs, and those having discs enclosed in a pouch—whenever the two discs come into close juxtaposition a medial crest or process, sometimes called the rostellate process, appears. When the two discs stand widely apart, the summit of the rostellum between them is smooth, or nearly smooth." In the illustration of O. mascula, fig. 4, B, D, we see the developed crest; in the illustration of Peru stylus viridis, fig. 11, " the first stage in the formation of the folded crest, the overarching summit bent like the roof of a house." It is his belief that " whilst the two discs were grad- ually brought together, during a long series of generations, the intermediate portion or summit of the rostellum became more and more arched, until a folded crest, and finally a solid ridge

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