BOTANICAL TERMS. 475 



having irregular flowers, a remarkable lip, and glutinous pollen. 



Related to the genus Orchis. 



Oval. Elliptical ; on the leaves of Magnolia glauca, Fig. 29. 

 Ovate. Egg-shaped. Oval, with the lower end largest ; as the leaves of 



Sabbatia angularis, Fig. 27. 

 Ovarium. The part formerly called germen. 

 Ovules. The young seeds of the plant, contained in the ovarium. 



Palate. A large obtuse projection which covers the throat of a personate 

 flower, Fig. 113. 



Palaceous. Chaffy. Ex. Receptacle of Bidens. 



Palmate. Hand-shaped. Deeply divided into spreading and somewhat 

 equal segments; as the leaves of Podophyllum peitatum, Fig. 46. 



Panduriform. Contracted in the middle, like a violin, Fig. 39. 



Panicle. A loose, irregular bunch of flowers, with subdivided branches. 

 Ex. Grasses, Fig. 1'29. 



Papilionaceous. Having an irregular corolla, like the Pea blossom, con- 

 sisting of four petals, of which the uppermost is called the banner ; 

 the two lateral ones wings ; and the lower one, which is commonly 

 boat-shaped, the keel. Mostly belonging to the class Diadelphia, 

 Fig. 116. 



Pappus. The down of seeds. A feathery appendage, Fig. 145. 



Parasitic. Growing on another plant and drawing nourishment from it. 



Parenchyma. The cellular substance of vegetables. Ex. Mushrooms. 



Partial. This term is applied to small or constituent parts in distinction 

 from general. 



Partition. The dividing wall in seed vessels, Fig. 135. 



Parted. Deeply divided, more than cleft. Ex. Corolla of Trientalis. 



Pectinate. Like the teeth of a comb. Intermediate between fimbriate 

 and pinnatifid. 



Pedate. Having a central segment or leaf which is simple and two lat- 

 eral ones which are compound, Fig. 64. 



Pedicel. The ultimate branch of a peduncle. A little stalk. 



Peduncle. A stem bearing flowers or fruit, which is the branch of an- 

 other stem. 



Pellicle. A very thin stratum or coat. 



Peltate. Having the stalk attached to some part of the surface or disk, 

 and not the margin, Fig. 80. 



Pendulous. Hanging down. 

 ' Pencilled. Ending like a painter's pencil or brush. 



Pentandrous. Having five stamens. Ex. Class Pentandria, Violet 



Perennial. Lasting more than two years. Ex. Oak, Rose-bush. % 



Perfect Jlower. One which possesses stamens and pistils, and produces 

 fruit. 



Perfoliate. Surrounding the stem on all sides, and perforated by it. It 

 differs from connate, in not consisting of two leaves. Ex. Eupato- 

 rium perfoliatum. 



Perianth. A sort of calyx which is immediately contiguous to the othei 

 parts of fructification, Fig. 101. 



Pericarp. A seed vessel, or whatever contains the seed. Ex. Pea pod, 

 page 71 . 



Permanent. See persistent. 



Persistent. Not falling off. Those parts of a flower are persistent 

 which remain till the fruit is ripe. 



Perio-ynous. Inserted into the calyx. 

 41* 



