. Introduction to botany. Botany. Fig. 106. Bilater- ally symmetrical flower of a violet After H. Miiller flowers. A flower which has stamens only is said to be gtam- inate, and one which has pistils only is said to be pistillate. 118. The perianth. In most flowers of dicotyledons the calyx and the corolla are quite unlike in color and texture, as they are, for instance, in roses and pinks. But in many other cases, as in the (mono- cotyledonous) lilies, there is no sharp distinc- tion in appearance between sepals and petals. This fact makes it convenient to have a single name for calyx and cor
. Introduction to botany. Botany. Fig. 106. Bilater- ally symmetrical flower of a violet After H. Miiller flowers. A flower which has stamens only is said to be gtam- inate, and one which has pistils only is said to be pistillate. 118. The perianth. In most flowers of dicotyledons the calyx and the corolla are quite unlike in color and texture, as they are, for instance, in roses and pinks. But in many other cases, as in the (mono- cotyledonous) lilies, there is no sharp distinc- tion in appearance between sepals and petals. This fact makes it convenient to have a single name for calyx and corolla taken together, and the word perianth is used to include both sets of organs. When the calyx is composed of separate sepals, and the corolla of separate petals, these parts are said to be distinct, and the flower is cliorisepalous or cTioripetalous (figs. 102 and 103). In the most specialized flowers, both of mono- cotyledons and of di- cotyledons, the calyx, the corolla, or both, appear as if grown together into a cup or tube (figs. 101 and 123). This condition arises from the fact that the floral envel- opes did not origmate in the form of separate sepals or petals on the surface of the recep- tacle, but as zones of tissue which developed into a tubular or cup-shaped perianth. In this case the flower is said to be synsepaJous or sympetalous. Sometimes the receptacle itself may be tubular or basin-shaped and Ijear the perianth on its run. Generally teeth or lobes of the calyx or corolla show of how many parts it is Fig. 107. Various types of anther ^1, iris, disehargiug pollen by a longitudinal slit; B, barberry, discharging pollen by uplifted valves; C, nightshade, D, bilberry, both discharging pol- len through holes or pores at the top of the anther. A, B, C, after Baillon; Z>, after Kerner. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustr
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