Glossary xxix 



PAPILLA : minute, blunt projections. 



PAPPUS: the bristles, awns, or hairs which crown the 



fruit of the Composites. 



PARIETAL : (placentas) attached to the wall of the ovary. 

 PEDUNCLE: a flower-stalk. 

 PERENNIAL: lasting from year to year. 

 PERFOLIATE : (leaves) havipg the basal part so extended 



and united as to make it appear as though the 



stem grew through them. 

 PERIANTH: the calyx and corolla collectively. 

 PETAL: a corolla-leaf. 

 PETALOID: petal-like. 

 PETIOLE: the leaf -stalk. 



PINNAE: the primary divisions of a compound leaf. 

 PINNATE : compound with leaflets arranged along a 



common axis. 



PINNATIFID: pinnately cleft. 

 PINNULES: secondary pinnae. 

 PLACENTA : the parts of the ovary to which the seeds 



are attached. 

 PLUMOSE : feathery. 



POLLEN : the fertilising powder of the anther. 

 POLYGAMOUS: having both perfect and imperfect 



flowers. 



PROSTRATE: lying flat on the ground. 

 PUBERULENT: covered with tiny almost imperceptible 



hairs. 



PULVINI: cushions or pads. 

 RACEME: a flower-cluster in which the stalked flowers 



are arranged along an elongated axis. 

 RACEMOSE: raceme-like. 

 RACHIS: the axis. 

 RADICAL : arising from the root, or portion of the stem 



resembling the root. 

 RECEPTACLE: the usually somewhat enlarged portion 



