. A manual of botany. Botany. MORPHOLOGY OP REPRODUCTIVE ORGANS 167 occurring at the junction of the claw and limb are ligules deve- loped on the petals. Formerly many of these appendages were described under the name of nectaries, although but few of them possess the power of secreting the honey-like matter or nectar fuom which they derived their names; they were therefore improperly so termed. Duration of the Corolla The duration of the corolla varies like that of the calyx, but it is almost always more fugitive than the latter. It is caducous if it falls as the flower opens, as in the Grape
. A manual of botany. Botany. MORPHOLOGY OP REPRODUCTIVE ORGANS 167 occurring at the junction of the claw and limb are ligules deve- loped on the petals. Formerly many of these appendages were described under the name of nectaries, although but few of them possess the power of secreting the honey-like matter or nectar fuom which they derived their names; they were therefore improperly so termed. Duration of the Corolla The duration of the corolla varies like that of the calyx, but it is almost always more fugitive than the latter. It is caducous if it falls as the flower opens, as in the Grape-vine ; commonly it is deciduous, or falls off soon after the opening of the flower. In rare instances it is persistent, in which case it usually becomes dry and shrivelled, as in Heaths and the species of Campanula, when it is said to be marcescent. (3) THE SPOROPHYLLS. The two whorls of sporophylls have been already termed the Andrcecium and the Gyuoecium or Pistil respectively. Flowers which possess both these whorls yig. 329. are somewhat inaccurately called herma- phrodite or bisexual; when only one is present, they are unisexual or diclinous, as in Oarex {fig. 329), and Salix {figs. 214 and 215). The flower is also then further described as staminate {figs. 214 and 329), when it contains only a stamen or stamens; and pistillate, when it has only a carpel or car- pels {fig. 215). When a flower possesses neither andrcecium norgynoeoium, as is some- times the case with the outer florets of the capitula of the Compositse, it is said to be neuter. When the flowers are unisexual, both staminate and pistillate flowers may be borne upon the same plant, as in the Hazel, Oak, and Arum {fig. 201), in which case the plant is called monoecious ; or upon diflerent plants of the same species, as in the WUlows, when the species is termed dioecious. In some cases, as in many Palms and in the Pellitory {Parietaria), staminate, pistillate, and hermaphrodite flowers are situated upon the sam
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