File:The orchids of New England; a popular monograph (1884) (20617663740).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. IO7
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the cup-shaped one of Orchis spectabilis, and may be described as a thin, tapering beak or projection, a shelf as it were, over the stigma; its tip appearing like a dark dot as you look into the flower. On this shelf lie the two pollen-masses, one in each cell, composed of " thin and tender plates of granular pol- len united by elastic threads (these plates so brittle that in S. Romanzoviana I have, on drawing out the pollen- masses, left much of the pollen behind). " In the middle of the rostellum," to quote from Darwin's ac- count of the kindred British species 5. autumnalis, " a 1 1 ⢠/r Fig. 34.âSpiranthes autumnalis, or Ladies' narrow, brown object (fig. Tresses. (FmnDarJn) 34, C) may be seen, bor- "⢠tn,t,her' cL Marsin of clinan" ^ ' J p. Pollen-grains. drum. dered and covered by trans- 'â Threads of the pollen- r. Rostellum. masses. j. Stigma. parent membrane. This n. Nectar receptacle. brown object I will call the A' ^"ft.T^xn ^.^ alon? re- J moved. The labellum has its lip fringed. boat-formed disc. This B* Mature nower with a11 the sePals and petals re- moved. The position of the labellum (which boat, Standing Vertically Up has moved from the rostellum) and of the up- per sepals is shown by the dotted lines. On its Stem, is filled With C. Front view of stigma and of the rostellum with 1 . 1 -ii 1 1 its embedded central disc. tniCK, milky, extremely ad- D. Front view of stigma and rostellum after the hesive fluid, which, when F dischas ^en removed. h,. Viscid disc removed and greatly magnified, view- eXOOSed tO the air, turns ed P°steri°r^y»and with the attached elastic threads of the pollen-masses; the pollen-grains brown, and in about One have Deen removed from the threads. minute sets quite hard. An object is well glued to the boat in four or five seconds, and when the cement is dry the attach- ment is wonderfully strong. " The face of the rostellum next the stigma is slightly fur- rowed in a longitudinal line over the middle of the boat, and is endowed with a remarkable kind of irritability; for if the fur- row be touched very gently with a needle, or if a bristle be laid along the furrow, it instantly splits along its whole length, and

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