The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . Cypsela (incorrectly called achenium) of the Compositfe, with various forms of pappus. 72, Ecliptaprocumbens, no pappus. 73, Ambrosia trifida. 74, Helianthus grosse-serratus, pappus 2-awned. 75,Ageratum conizoides, pappus of five scales. 76, Mulgedium, capillary pappus—cypsela slightly ros-trate. 77, Lactuca elongata, rostrate cjT)sela. 105. Again: the
The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . Cypsela (incorrectly called achenium) of the Compositfe, with various forms of pappus. 72, Ecliptaprocumbens, no pappus. 73, Ambrosia trifida. 74, Helianthus grosse-serratus, pappus 2-awned. 75,Ageratum conizoides, pappus of five scales. 76, Mulgedium, capillary pappus—cypsela slightly ros-trate. 77, Lactuca elongata, rostrate cjT)sela. 105. Again: the calyx, or the limb of the calyx, is reduced toa mere rim, as seen in the Umbelliferge. In the AmentaceousOrders, the whole perianth diminishes to a shallow cup, as in 38 STKUCTURAL BOTANY. the Poplar and Willow, or altogether disappears, as in the Birch,Ash, and Lizard-tail (15, 16). 106. Setse, meaning bristles in general, is a term specijicallyused to denote the reduced perianth of the sedges. In the Bog-rush (Scirpus) there is, outside the stamens, a circle of six setae,representing a 6-leaved perianth (78). In the Cotton-grass(Eriphorum) the setoe are multiplied and persistent on the fruit,becoming long and cotton-like. 107. Perig
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1870
