xxii FLOWERING PLANTS OF THE RIVIERA 



PALATE, part of the base of the lower lip which closes the mouth of a ringent 



corolla. 



PALEACEOUS, chaffy. 



PALE^E, or CHAFF, the inner bracts or scales in Composita, Graminece, etc. 

 PALMATE, divided like a hand into several lobes. 

 PANICLE, a branched raceme. 

 PAPILIONACEOUS, like the flower of a Pea. 

 PAPILLAE, small elongated protuberances. 



PAPPUS, a feathery appendage of the seed of many Composite. 

 PARASITE, a plant living on or in another (the host) from which it derives part 



of its food ; e.g. Orobanche. SemUparasites include such plants as Rhin- 



anthus, Euphrasia, etc. 

 PARIETAL, on the inner surface of an ovary. 

 PATENT, spreading, open. 



PECTINATE, finely divided like the teeth of a comb. 

 PEDICEL, the stalk of a flower in a compound inflorescence. 

 PEDUNCLE, the stalk of an inflorescence, or of a solitary flower. 

 PELTATE, applied to leaves which are more or less round, with the stalk on the 



face, not at the edge, e.g. Hydrocotyle. 

 PERENNIAL, lasting more than two years. 

 PERFOLIATE, when the stem passes through a pair of leaves, as in Chlora 



perfoliata. 

 PERIANTH, the floral envelope replacing the calyx and corolla in the Mono- 



chlamydeae and Monocotyledons ; e.g. the flower of a Crocus. 

 PERICARP, the wall of the developed ovary as seen in the fruit. 

 PERIGYNOUS, when the corolla and stamens are borne on the calyx but free from 



the ovary. 



PERSISTENT, not soon falling off. 

 PETAL, a unit of the corolla. 

 PETALOID, in the colour or form of a petal. 

 PETIOLATE, having a leaf-stalk or petiole. 

 PETIOLE, a leaf-stalk. 

 PHANEROGAM, a flowering plant. 

 PILOSE, sparsely covered with rather long hairs. 



PINNATE, when several segments succeed each other on each side of a stalk. 

 PINNAE, the segments of a pinnate leaf. 

 PINNATIFID, pinnately cleft. 



PINNATISECT, pinnately divided down to the rachis. 



PISTIL, the portion of the flower comprising the ovary, style, and stigma. 

 PITH, a column of cellular tissue in the centre of the stem of many plants. 

 PITTED, covered with small depressed spots. 



PLACENTA, the portion of the ovary to which the ovules are attached. 

 PLUMULE, the ascending leafy part of the embryo. 

 POD, a one-celled and two-valved seed-vessel with the seeds along the inner 



angle. 



POLLEN, fertilising powder contained in the anthers. 

 POLLINATION, the act of dusting the stigma with pollen. 

 POLLINIUM, the pollen-mass of an Orchid. 



POLYGAMOUS, bearing hermaphrodite and unisexual flowers at the same time. 

 POLYMORPHIC, variable in shape or form. 

 POLYPETALOUS, flowers having many separate petals. 

 PREMORSE, bitten off. 



PRICKLE, a sharply-pointed but not woody excrescence on a branch or leaf, etc. 

 PTERIDOPHYTES, Fern plants. 

 PUBERULENT, feebly pubescent. 



PUBESCENT, downy, furnished with fine, soft, short hairs. 

 PULVERULENT, covered with fine powdery matter. 



RACEME, an inflorescence in which stalked flowers are borne on a central stem, 

 the lowest flowers opening first. 



