GLOSSARY. 441 



Orchideous plants. A natural order of plants in the class Gynan- 

 dria, having irregular flowers, a remarkable lip, and gluti- 

 nous pollen. Related to the genus Orchis. 



Oval. Elliptical; as the leaves oi Magnolia glauca. Med. Bot. 

 PI. 27. 



Ovary. The same as the Germ, which see. 



Ovate. Egg shaped. Oval with the lower end largest ; as the 

 leaves of Sabbalia angularis. Med. Bot. PI. 57. 



Ovules. The rudiments of future seeds. 



P. 



Palate. A large obtuse projection which closes the throat of a 

 personate flower. 



Paleaceous, Chaffy. 



Palmate. Hand shaped. Deeply divided into spreading and 

 somewhat equal segments ; as the leaves of Podophyllum 

 peltatum. Med. Bot. PI. 23. 



Panduriform. Contracted in the middle like a violin. 



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

 branches ; as in Statice Caroliniana. Med. Bot. PI. 25. 



Papilionaceous, Having an irregular corolla like the pea blos- 

 som ; consisting 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. 



Papillose. Pimpled. 



Pappus, The down of seeds. A feathery appendage. 



Parasitic. Growing on another plant and drawing nourishment 

 from it. 



Parenchyma. The cellular substance of vegetables. 



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

 distinction from general. 



Partition. The dividing wall in seed vessels. 



Parted. Deeply divided ; more than cleft. 



Pectinate. Like the teeth of a comb. Intermediate between 

 fimbriate and pinnatifid. 



Pedate. Having a central segment or leaf Avhich is simple, and 

 two lateral ones which are compound. 



