222 GLOSSARY 



Operculum. A lid. 



Orbicular. Circular in outline or nearly so. 



Orthotropous. An erect ovule with the micropyle at the apex and the hilum 

 at the base. 



Oval. Broadly elliptical. 



Ovary. The portion of the pistil containing the ovules. 



Ovate. Egg-shaped with the broader end down; broadly and shortly lanceo- 

 late. 



Ovule. The body which after fertilization becomes the seed. 



Palate. The projection on the lower lip of a personate corolla wliich closes 



the throat. 

 Palet. The thin chaffy bract subtending the flower in the Gramineae. 

 Palmate. Resembling the hand with spreading fingers. 

 Panicle. An irregular compound inflorescence. 

 Panicled, paniculate. Borne in panicles. 

 Papilionaceous. A name applied to the peculiar corolla of the Leguminosae ; 



pea-like. 

 Papillose. Bearing minute projections. 



Pappus. The calyx in Compositae, consisting of awns, bristles, teeth, etc. 

 Parasitic. Growing on and absorbing nourishment from other plants. 

 Parietal. Borne on the inner surface of the wall of a capsule. 

 Parted. Cut down nearly to the base. 

 Pectinate. Cut into narrow crowded segments. 

 Pedate. Palmately cut, the lateral segments 2-cleft. 

 Pedicel. A secondary peduncle. 

 Pedicellate. Borne on a pedicel. 



Peduncle. A primary fiower-stalk, supporting a flower or cluster of flowers. 

 Pedunculate. Borne on a peduncle. 



Peltate. Hbield-shaped and attached to a stalk by the lower surface. 

 Perennial. Living for years. 



Perfect. Applied to a flower having both sexual organs. 

 Perfoliate. A leaf clasping the stem so that the stem appears to pass through 



it. 

 Perianth. The modified floral leaves taken collectively. 

 Pericarp. The wall of the matured ovary. 

 Perigynium. The sac enclosing the achene in Carex. 

 Perigynous. Attached to the perianth and hence around the ovary. 

 Persistent. Unusually long-continuous. 



Personate. Two-lippe<l with the throat closed by a protuberance. 

 Petal. A division of the corolla. 

 Petaloid. Resembling a petal. 

 Petiolate. Having a petiole. 

 Petiole. The leafstalk. 

 Petiolulate. Having a petiolule. 

 Petiolule. A small petiole, supporting a leaflet. 

 Phaenerogamous. I'lants producing true tlowcrs and seeds. 

 Phyllodla. A l)ladcless petiole. 

 Pilose. Bearing long soft hairs. 

 Pinna (j)l. pinnae). One of the primary divisions of a pinuately compound 



leaf 



