GLOSSARY 327 



Plicate, folded on the principal ribs as a fan is folded. 



Polished, shining as if polished, p. 36. 



Pollard, a tree repeatedly pruned by lopping close to the junction of the 



stem and the crown. 

 Pollen-grain, the dust-like powder discharged from the anther to be 



deposited on the stigma, p. 71. 

 Primordial cell, a living mass of protoplasm which has not yet formed 



its cell-membrane, p. 77. 



Prominent, standing off from the general surface, p. 36. 

 Prostrate, lying flat on the ground. 

 Protoplasm, the viscous living substance of the cell, alone capable of 



assimilating new materials and converting them into new plant- 



substaiice, p. 74. 



Pseudo-palmate, falsely palmate : the primaries diverging from the leaf- 

 base, but not exactly from the same point, p. 63. 

 Pseudo-parallel, like curved-parallel, but with a distinct network between 



the principal ribs, p. 35. 

 Puberulent, faintly pubescent. 

 Pubescent, softly hairy, downy, p. 36. 

 Pulverulent, looking as if covered with dust. 

 Pulvinule, the small pulvinus of a leaflet, p. 43. 



Pulvinus, the cushion-like swelling at the base of some petioles, p. 42. 

 Pungent, ending in a sharp pricking point, p. 191. 

 Quincuncial, of five leaves, &c., so arranged that two are wholly outside, 



two inside, and one with one margin exterior, and the other interior. 

 Quinque-foliolate, with five leaflets, p. 43. 

 Raehis, the common leaf-stalk on which the leaflets of a compound leaf 



are arranged, p. 40. 



Radical, appearing as if springing from the root in the soil, p. 4. 

 Raphides, needle-shaped crystals of calcium-oxalate found in some cells. 

 Reniform, kidney-shaped, as in Fig. 7, p. 23. 

 Respiration, the taking in of oxygen and giving off of carbon-dioxide 



common to all living parts of higher plants and animals, p. 125. 

 Reticulated, netted, as in ordinary venation, p. 33. 

 Retuse, notched at the apex, as in Fig. 10, p. 28. 



Rib, one of the stronger strands of vascular bundles in the leaf, p. 32. 

 Rosulate, in little rosettes, p. 4. 

 Rotund, rounded, approximately circular, p. 22. 

 Rugose, wrinkled, p. 36. 



Sagittate, shaped like an arrow-head, as in Fig. 7, p. 23. 

 Scabrid, rough like a file, p. 37. 

 Scarious, brown, as if toasted or scorched. 

 Scattered, inserted singly at various intervals, or without obvious order, 



p. 4. 



