Plant-life, with 74 full-page illus., 24 being from photos, by the author and 50 in colour from drawings . ORASS-OF-PARNASSUS (Parnama falustns),Ordir SAXIFRAGACEM. INSECT POLLINATION 319 flower. The significance of this arrangement in relationto cross-fertilization is obvious. The Grass of Parnassus {Parnassia palustris,Plate LXII.)) a member of the Saxifrage family, beauti-fies bogs and moist heaths with its delicate white flowersin late summer. It stands out in virgin purity and graceagainst its dark background of green. The nectariesof this flower are elaborate, even ornate; they are reall
Plant-life, with 74 full-page illus., 24 being from photos, by the author and 50 in colour from drawings . ORASS-OF-PARNASSUS (Parnama falustns),Ordir SAXIFRAGACEM. INSECT POLLINATION 319 flower. The significance of this arrangement in relationto cross-fertilization is obvious. The Grass of Parnassus {Parnassia palustris,Plate LXII.)) a member of the Saxifrage family, beauti-fies bogs and moist heaths with its delicate white flowersin late summer. It stands out in virgin purity and graceagainst its dark background of green. The nectariesof this flower are elaborate, even ornate; they are reallymodified stamens, and each one of the five consists of anectary proper surrounded by eleven radiating arms,each arm being surmounted by a yellow knob like apins head. The functional stamens are five in number,but they do not all liberate pollen at the same time;indeed, they ripen one by one, and each one as it is readytakes up a position in which an insect alighting fromabove is bound to come in contact with it, and detachsome pollen. But if an insect settles at the edge of apetal, avoiding the anthe
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Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1915
