Text-book of structural and physiological botany . the formation of the fruit, asis sometimes the case with the calyx. THE PERIANTH. When the Perianth { the two floral envelopes, thecalyx and corolla) is green, as in the elm and Rumex (, 259, 260), it is said to be sefaloid] when bright-coloured or white, as in Orchideae and Liliace^ (Fig. 261), it 134 Stritctiual and Physiological Botany. is petaloid; the dry scarious perianth of grasses is gluma-ceous ; that of the catkins of many forest-trees scaly. Simi-lar terms may be appUed to the pe-rianth as to the calyx and corolla, withr
Text-book of structural and physiological botany . the formation of the fruit, asis sometimes the case with the calyx. THE PERIANTH. When the Perianth { the two floral envelopes, thecalyx and corolla) is green, as in the elm and Rumex (, 259, 260), it is said to be sefaloid] when bright-coloured or white, as in Orchideae and Liliace^ (Fig. 261), it 134 Stritctiual and Physiological Botany. is petaloid; the dry scarious perianth of grasses is gluma-ceous ; that of the catkins of many forest-trees scaly. Simi-lar terms may be appUed to the pe-rianth as to the calyx and corolla, withrespect to the form, size, number, andarrangement of its separate parts. Itmay be gamophyllous or symphyllous[^ monophyllous ] on the one hand ; or, onthe other hand, apophyllous or cleutheiO-phylloics [^ polyphyllous]. It may be deci-duous^ as in orchis, or persistent^ and maythen become accrescent and dry as in thehazel-nut, or succulent as in the the latter cases and some others, asRumex and Hippophae, it takes an impor-I. II. Fig. se-paioid perianth of Tv?/-7nex acetosa (magni-fied).
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