GLOSSARY 



PAPPUS (from Latin and Greek for an old man, in allusion 

 to the fact that many forms of pappus are white) : a tuft, 

 resembling bristles or down, that adheres to the seed of an 

 individual flower in the flower-head of a member of the 

 Composite Family. Heads of Pappus (the "clocks") of 

 the Common Dandelion (Taraxacum officinale) when it has 

 gone to seed, are very conspicuous. 



PEDUNCLE, PEDICEL (from a Latin diminutive for a foot) . 

 Peduncle: the main flower-stalk; pedicel, a secondary 

 flower-stalk. From the peduncles of the Hardback 

 (Spircea tomentosa) rise the pedicels. 



PERIANTH (from Greek for a flower) : the flower-envelope, 

 consisting of the calyx and corolla or of calyx alone. It 

 may be all one colour or the corolla may be coloured and 

 the calyx green. Perianth of the Wood Lily (Lilium 

 philadelphicum) is of one general colour, red. 



PETAL (from Greek for a leaf): one of the divisions of 

 the corolla. The petals of the Hairy Willow Herb (Epilo- 

 bium hirsutum) are magenta. 



PETIOLE (diminutive from Latin for a foot) : a leaf-stalk. 

 A petiole bears the same relation to the leaf that a peduncle 

 does to the flower. Petioles of the Tall Buttercup (Ran- 

 unculus acris) are long. 



PINNATE, PINNATIFID, PINNATELY-DIVIDED, PINNATELY- 

 VEINED (from Latin for a feather) : said of the arrangement 

 of parts on either side of a main axis as the parts of a 

 feather are arranged. Leaves of the Sweet Fern (Myrica 

 asplenifolia] are pinnatifid. 



PISTIL, PISTILLATE (from Latin for a pestle, in allusion 

 to the shape of the organ) : the chief organ of the flower, 

 consisting of the ovary that bears the seeds, the style 

 that is the passage to the ovary, the stigma that receives 

 the pollen from the stamens. Pistil of the Marsh Pink 

 (Sabatia gracilis) is pure white, the stigma two-divided. 



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