190 GLOSSARY. 
Pistil. The part of a flower that produces ovules and seeds. 
Pistillate. Flowers that have pistils but no stamens. 
Pith. The central part of a stem, surrounded by the woody 
cylinder: usually continuous and of uniform’ texture, but 
sometimes with firmer plates or diaphragms at the nodes 
(grape) or at intervals between them (sour gum, sweet 
bay); in some genera disappearing or excavated (honey- 
suckle), or chambered between persistent thin plates (golden 
bell, walnut). 
Placenta. The part of the pistil to which seeds are attached. 
Polygamous. With both perfect and imperfect flowers (maple). 
Polypetalous. With petals not grown together, as in a rose. 
Pome. An apple-fruit, the fleshy pulp crowned by the calyx or 
other vestiges of the flower, and separated from the seeds 
by a papery (apple) or bony (red haw) core. 
Prickle. A pungent outgrowth of the cortex or bark of a stem, 
or of the surface of a leaf: contrasted with spines, which 
are modified forms of leaf or stem. 
Prostrate. Low and spreading, as applied to shrubs: trailing. 
Puberulent. Minutely pubescent. 
Pubescent. With hairs. 
Pungent. With sharp hard point. 
Raceme. A simple flower-cluster (wild cherry). 
Rachis. The axis of a pinnate leaf etc.; sometimes continued 
as a spine or bristle (pea tree). 
‘Radiate. The same as digitate. 
Raised. Lying wholly or in part above the general surface of the 
twig, as applied to leaf-scars. 
Ranks. As applied to leaves, the longitudinal lines on the stem 
in which foliage is arranged: usually 2, 3, 5 or 8 for alter- 
nate leaves; and 4 for opposite or obliquely opposite leaves. 
Receptacle. The part of a stem that bears the parts of a flower, 
or that bears the flowers in a condensed inflorescence like 
that of sunflower or fig. 
Reflexed.. Bent downward or backward. 
