484 PUINCIPAL DEFINIl'IONS AK^D NAMES. 



O 



Octandria, 131 

 (Eder, 459 

 Oil in plants, 355 

 Opium, its effects on plants, 

 375 



Organic bodies, their proper- 

 ties, 342 



Organs, their value, 1683 — 

 means which nature presents 

 for knowing them, 174, — 

 their change, 182,-«-union of 

 them, 185 



Orto, 442 



Ovarium, 104 



Oviedo, 442 



Oxalic acid, 351 



Oxygen exhaled from leaves, 

 314, — its effects on plants> 

 374. 



!> 



Palisot-Beauvois, 466, 467 

 Pallas, 458, 467 

 Palmstruck, 465 

 Panicle, 84 



Papilionaceous flowers, 98 

 Paraphysis, sap-tubes in the 

 neighbourhood of the sexual 

 parts of mosses, (PL 2. Fig. 



6-).. 



Parasitic plants, 418, 423 

 Parenchyma of leaves, 309, — of 



flowers. 324 

 Parkinson, 449 

 Partitions of fruit, 110 

 Pavon, 466 

 Pentandria, 131 

 Perrault, 444 

 Persoon, 462, 467 

 Petiver, 449 

 Phanerogamia, 131 

 Pharmacopolists of ancient 



Greece, 430 

 Phosphorus in plants, 36l 

 Phrase, 235 

 Piso, 448 



Pistil, 106, — its structure, 339 

 ]Pith of plants, 67,— its struc- 

 ture, 299 



Placenta, 111 

 Plinius, 435 

 Pluknet, 449 

 Plumier, 453 



Polarised matters in flowers, 



330, — are never free in or* 



ganic bodies, 344 

 Pollen, 107,— its structure, 335, 



336, — composition, 337, — ef-- 



fects, 381 

 Pollick, 459 

 Polo, 437 

 Poly adelphia, 131 

 Poiyandria, ib. 

 Polychroit, 362 

 Polycotyledonous, 386 

 Polygamia, 131 

 Porous vessels> 283 

 Potash, a production of plants> 



358 



Primeval world, 403 

 Primitive forms of plants, 270 

 Punctured vessels, 283 

 Pursh, 466 



Q 



J. Quer y Martinez, 407 

 R 



Racemus, 84 

 Rajinesque, 465 

 Raphe. See Cotnmissura. 

 Rauwolf, 442 

 Ray, 141, 445 

 Rebentisch, 465 



Receptacle, 85,- — its structure, 

 changes after impregnation, 



383 

 Redouts, 



Regularity of parts, 20, 203 

 Reichard, 462 

 Reichel, 457 



Resin in plants, 357,'^its flow 



in trees, 419 

 Retrogradation in vegetation, 



414 

 Rkeide, 448 



Rhizotomists of ancient Greece, 



430 

 Richard, 139 



