Preface xv 



Oblong Longer than broad, with nearly parallel 

 sides. 



Ovary Part of the pistil containing seeds. 



Ovate Egg-shaped, broad end downwards. 



Palate A rounded projection of the lower lip clos- 

 ing the throat. 



Palmate Radially lobed; spreading like the .fingers 

 of the hand. 



Parasitic Stealing nourishment from other plants. 



Pedicel The stem of a single flower. 



Peduncle A flower-stalk supporting either a single 

 flower or a cluster. 



Perennial One that lasts year after year. 



Perfect Flower One having both stamens and pis- 

 til. 



Perfoliate Leaf pierced by the stem. 



Perianth The calyx and corolla of a flower. 



Petal A single division of the corolla. 



Petiole The stalk of a leaf. 



Pinnate Compound, with leaflets arranged on each 

 side of a common petiole. 



Pistil The ovary, style and stigma of a flower. 



Pistillate Female flowers; pistils but no stamens. 



Pollen The life-producing grains in the anthers. 



Raceme Pediceled flowers growing along a more 

 or less elongated flower stem. 



Radiate Growing from or around a common center. 



Ray The marginal flowers surrounding a disc. 



Rib A prominent vein of a leaf. 



Root That part of a plant underground. 



Scape A leafless flower-stem rising from the 

 ground. 



Sepal A division of the calyx. 



Serrate Having sharp teeth pointing forward. 



Sessile Without rootstalk, pedicel or petiole. 



Simple Not compounded or branched. 



Spadix A thick, fleshy spike usually in a spathe. 



Spathe A large bract enclosing flowers. 



