GLOSSARY 159 



Odd-pinnate. Pinnate with a terminal leaflet. 



Opposite. As applied to leaves, two at each node: the suces 

 sive pairs "decussate", so that the leaves are in four ranks 

 on the stem. Sometimes (buckthorn) the leaves of a pair 

 are separated so as to appear alternate but in four ranks. 

 Plants with whorled leaves (deutzia) frequently have 

 them opposite as well. 



Order. A natural group of plants consisting of related genera. 

 Ordinal names usually end in ales. 



Ovate. Like the longitudinal section of an egg, the greatest 

 width below the middle, as applied to leaves. 



Ovoid. Egg-shaped, as applied to solid objects like trees. 



Palmate. The same as digitate. 



Panicle. A compound or branched raceme. 



Papilionaceous. The sweet-pea type of flower. 



Pappus. The plume of a Composite akene (dandelion etc.). 



Parted. More deeply divided than lobed, but not compound, 

 as applied to leaves. 



Pedicel. The stalk of a flower in a compound inflorescence. 



Peeling. Much the same as flaking or shredding. 



Pellucid-dotted or glandular. Applied to leaves etc. which con- 

 tain internal oil-glands (orange, wafer-ash, etc.). 



Peltate. Attached to a stalk at some distance from the mar- 

 gin, like the leaf of an Egyptian "lotus", the scales on 

 leaves of the Russian "olive," etc. 



Pendent. Hanging, like the cone of spruce: that of fir is erect. 



Percurrent. With the main trunk continued through the top. 

 hence usually conical or spire-like (spruce), as applied to 

 trees: in extreme contrast with deliquescent. 



Perennials. Plants that live for a number of years. 



Perfect. With both stamens and pistil, as applied to flowers. 



Pericarp. The outer part of the fruit. 



Perigynous. With sepals, petals and stamens around the edge 

 of a cup surrounding but free from the pistil or pistils, as 

 in the cherry and rose: contrasted with epigynous and 

 hypogynous. 



Persistent. Not deciduous, as applied to leaves. 



