460 APPENDIX. 



Obsolete, scarcely visible ; as the calyx of many Umbelliferous plants. 



Obtuse, blunt at the end, not acute ; as the leaves of Cowslip. 



Octandrous, having eight stamens. 



Operculate, covered with a lid. 



Opposite, placed on opposite sides of some other part on the same plane. 

 Thus, two leaves frequently proceed from opposite sides of the stem at 

 the same height. 



Orbicular, circular or spherical ; orbicular-ovate, a figure between circular 

 and ovate ; orbicular-reniform, between round and kidney-shaped. 



Orifice, an opening. 



Ova, eggs ; the seeds before they are impregnated by the pollen. 



Oval, elliptical, and somewhat rounded at each end. 



Ovary, germen ; the hollow base of the pistil in which the ovules are con- 

 tained, and which finally becomes the fruit. 



Ovate, egg-shaped ; having the outline of a longitudinal section of an egg, 

 the broad end downwards ; as the leaf of Adders-tongue, Bugle, Eye- 

 bright. Ovate-lanceolate, between ovate and lanceolate ; ovate-cordate, 

 between egg-shaped and heart-shaped ; ovate-globose, between ovate 

 and circular, &c. 



Ovoid, egg-shaped ; applied to a solid figure. 



Ovula, l the same as ova ; the unimpregnated seeds of the ovary or ger- 



Ovules, ) men. 



P. 



Palate, the mouth of a ringent flower. 



Paleaceous, having chaffy scales, as the receptacle of many Syngenesious 



flowers. 

 Palece, the chaffy or membranous bracteae or scales on the receptacle of 



some Syngenesious flowers ; also the bracteae between the glumes and the 



stamens of grasses. 

 Palmate, divided so as to represent a hand spread open ; as the leaf of Aconite, 



the radical leaves of Crowfoot. 

 Panicle, a kind of inflorescence, in which the axis or "main stem is branched, 



and the secondary divisions are greatly elongated and widely separated ; 



as in St. John's Wort, and many of the grasses. 

 Paniculate, forming a panicle, or disposed in the manner of a panicle. 

 Papilionaceous, "butterfly-shaped ; applied to the flowers of Diadelphous 



plants, and those that bear legumes ; as Broom, Rest-harrow. 

 Papillae, small soft excrescences. 

 Papillose, covered with papillae. 

 Pappus, the hair-like processes crowning the fruit of many Syngenesious 



plants, answering to the calyx of other plants ; as in Chamomile, 



Coltsfoot, Dandelion. 

 Parenchyma, cellular tissue ; as the pith of Elder. 

 Parasitical, growing on and receiving nutriment from another plant ; as 



the Missel toe. 



