GLOSSARY 



Oddly-pinnate. With an uneven number of leaflets pinnately ar- 

 ranged, having a single terminal leaflet. 



One-sided. With the parts arranged mostly on one side of the stem 

 or axis. 



Opposite. Applied to leaves or branches which are arranged in 

 pairs at the same height on the stem and on different sides. 



Organ. Any part having a special function. 



Oval. About twice as long as broad with regularly curved outline. 



Ovary. The part of the pistil which contains the ovules or seeds. 



Ovate. Like the outline or longitudinal section of a hen's egg with 

 the broadest end toward the base. 



Ovate-heart-shaped. Ovate with the base shaped like a heart as it 

 is usually pictured. 



Ovate-lanceolate. Intermediate between ovate and lanceolate. 



Ovoid. A solid shaped like a hen's egg. 



Ovule. The young seed or body in the ovary before fertilization. 



Palea. The inner bract of a flower in grasses, the flowering scale. 

 Palet. The same as palea, which see. 



Palmate. Lobed or divided so that the indentations all point to- 

 ward the petiole. 

 Palmately compound. Having the leaflets all attached to the apex of 



the petiole. 



Palmately lobed. See palmate. 

 Palmately veined. Having the principal veins proceeding from the 



apex of the petiole. 

 Panicle. An inflorescence with numerous, rather irregular branches 



which are again branched and often rebranched, with each 



flower at the end of a stalk. 

 Papery. Having the texture of common paper. 

 Pappus. The calyx in each flower of the Compositae at the top of 



the seed, as bristles, hairs, scales or awns. 

 Parallel veined. Having all of the principal veins extending side by 



side from the base to the apex of the leaf. 

 Parasite. A plant which grows upon another plant by deriving part 



or all of its food from it. 

 Parted. Applied to parts which are distinctly separate, not at all 



united. 



Pendulous. Hanging downward. 

 Pepo. A fruit with a hard outer rind and a fleshy interior, like 



the melon or pumpkin. 

 Perennial herb. One which lives more than two years but dies to 



the ground each winter. 



Perfect flower. One w r hich has both stamens and pistils. 

 Perianth. The floral leaves, or the tube formed by them, when not 



differentiated into a green calyx and colored corolla. 

 Perigynium. The sac-like envelope which encloses the ovary in 



Carex. 



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