Perisporum, 150.
Peristachyum, 149.
Peristomium, 267.
Perithecium, 271. 275.

Peritropal, 488.
Permanent, 476.
Permeability, 296.

Peronate, 470.
Perpendicular, 486.
Perpusillus, 473.
Persistent, 328. 476.
Personate, 167. 451.
Perspiration, 389.
Pertusus, 467.

Pes, 474.

Petals, 166.

Petal-like, 451.

Petaloideus, 451.

Peteridium, 238.

Petioles, 112. 127. *138. 515.

-, partial, 138.

Petiolaris, 490.
Petiolules, 138, 139.

Phæo-, 478.

Phlæum, 89.

Phoeniceous, 480.

Phoranthium, 154.

Phragmiger, 466.

Phycomater, 273.
Phycostemones, 192.
Phyllodium, 140.
Phylloideus, 451.
Phyllum, 163.
Physiology, 277.
Phytography, 506.
Piceus, 478.

Pictus, 481.

Pileus, 274.

Pili capitati, 61.

Malpighiacei, 61.

pseudo-Malpighiacei, biacumi-

nati, 61.

scutati, 63.

subulati, 60.

Pilidium, 271.

Piliferus, 458.

Pilose, 163.

Plate, 92. 285.

Plateau, 81. 194.

Pleurenchyma, *22. 25. 35. 298.

Plicativa, 484.

Plopocarpium, 236.

Plumbeus, 477.
Plumose, 163. 470.
Plumule, 250. 253.
Pluri, 495.
Poculiform, 453.
Podetia, 271.
Podogynium, 194.
Podospermium, 194.
Poils en écusson, 63.

en fausse navette, 61.
en goupillon, 61.
en navette, 61.

Point, 458.

Point-growers, 260.
Pointless, 460.
Pointleted, 459.

Poisons, metallic, 419.

vegetable, 419.

Polakenium, 240.

Polexostylus, 237.

Polinaria, 269.

Polish, 471.

Polished, 471.

Politus, 471.

surface of, 186.

colour of, 190

Pollen-cells, 183.

Pollen-grain, shell of, 188.

Pollen-granules, figure of, 187.

Pollen-tube, 191.

Pollex, 474.

Pollicaris, 474.
Poly-, *494, 495.
Polyadelphous, 173.

Polycarpous, 475.

Pinnatisectus, 463.

Pistil, 151. 191.

Pistillidia, 266.

Pita flax, strength of fibre of, 24.

Polychorion, 237.

Polypetalous, 167.

Polyphore, 211.