202 



INDEX. 



the woody fibre of, 19 ; the lacticiferouo ves- 

 sels, 28; secretions of, 3156; colouring 

 principles of, 53 ; organs of, 57 ; the stem, 58 ; 

 the nodes, ib.; the cuticle, 60; the stomata, 

 61 ; hairs of, 65 ; prickles, 68 ; scurf of, ib. ; 

 the glands of, 69 ; the stems, TOetseq. ; divided 

 into trees, shrubs, and herbs, 74 ; the pith, 76 ; 

 the bark, 77 ; the wood, 79 ; immense growth 

 and longevity of, 82, 83 ; cellular structure, 84 ; 

 vascular structure, 88 ; the pith, 89 ; the roots, 

 90; the leaves, 92104; the inflorescence, 

 105 et seq. ; the stamens, 116 et seq. ; the 

 pistil, 123; fruits of, 131; the seed, 134; 

 flower less plants, 138 ; ferns, ib. ; mosses, 143 ; 

 lichens, 145 ; algae, 147 ; their classification, 

 149 ; the Linnaean system of classifying, 151 

 182 ; characteristics of, 179 et seq. ; the natural 

 order of classification, 183; Dr. Lindley's sys- 

 tem of classifying, 184192. 



Pleurenchym (Gr, pleuron a side, and, chymos 

 juice), a woody tissue, 18. 



Pleurothalis (Gr. pleuron, and thalia bloom), 

 fibre cell from its leaf, 14. 



P. ruscifolia (Gr. P. and Lat. " russet leaves "), 

 cells in the leaf of the, 15. 



Pliny tallow, whence produced, 46. 



Plumule of the plant (Lat. pluma soft down), 

 58 ; of the seed, 136. 



Pollen of the stamen, 118121 ; grains of the, 122. 



Pollen tubes, 121, 122. 



Polyandria (Gr. polys many, and andres males), 

 Class XIII. of Linnaeus, 152, 162 ; the order, 

 153 et passim. 



Polyaudrous flower of the poppy, 118. 



Polydelphia (Gr. polys, and adelphoi brethren), 

 Class XVIII. of Linnaeus, 152, 167. 



Polydelphous stamens, 117. 



Polygamia (Gr. polys, and gamot marriage), 

 Class XXIII. of Linnaeus, 152, 112 ; the order, 

 15? et passim. 



Polygynia (Gr. polys, and gyne a female), the 

 order, 153 et passim. 



Polypodium vulgare (Gr. polys, antipodes feet), 

 the common fern, 139. 



Polytrichum commune (Gr. polys, and inches 

 hairs), antheridium of the, 143. 



Pomum, the apple, 133. 



Poppy, lacticiferous vessels of the, 28 ; polyan- 

 drous flowers of the, 118 ; placentae in the, 128. 



Poppy oil, a vegetable secretion, 45. 



Pores of plants, 17 ; of woody fibres, 20. 



Potato, section of a, 5 ; its vegetable secretion, 

 32 ; starch cells of the, 35, 39 ; disease in the, 

 40 ; in its healthy and diseased conditions, ib. ; 

 underground stem of the, 70. 



Potato plant, spiral vessels of th, 26 ; stamen of 

 the, 118. 



Prickles of plants, 68. 



Primine of the ovule, 128, 129, 134. 



Promelia perforata, 146. 



Protococcus viridis (Gr. protos the first, and o# 

 cut berry; Lat. viridis green), clusters of, 5. 



Pseudo-bulbs of orchidaceous plants, 73. 



Pteris aquilina (Gr. pteris a fern, and Lat. agitt* 

 Una eagle-like), 28. 



Pterocarpus Santalinus (Gr. pttros winged, and 

 carpos fruit), 54. 



Pyroligneous acid (Gr. pyros tire, and Lat. lig- 

 num wood), whence obtained, 50 ; its uses, ib. 



Quekett, Professor, lectures of, 8. 



Quercitron bark (Lat. quercus an oak, and eiU 



rus citron), a vegetable dye, 54. 

 Quercus (Lat. "an oak"), the various species 



whence tannic acid is obtained, 50. 

 Q. infectoria (Lat. Q. and inficio to dye), 54. 

 Quernales, 188. 



Raceme, the, of inflorescence, 106, 107. 

 Radicle of a plant, 58 ; of the seed, 136. 

 Ramalina furfuracea (Gr. ramale a withered 



bough; and Lat. furfur bran), a vegetable 



dye, 54. 

 Ramenta of plants (Lat. ramentum the scraping 



of anything), 69. 

 Ranales (Lat. ranee frogfc), 189. 

 Rape oil, a vegetable secretion, 45. 

 Raphe of the ovule, 129. 

 Raphides (Gr. raphis a needle), vegetable secre* 



tions of, 41 ; found in the common onion, ib. 

 Rat, cartilage from the ear of a, 15. 

 Ray, John, a promoter of botanical science, 3. 

 Receptacle of flowers, 105. 

 Red, one of the principal colours in vegetables, 53, 

 Red sanders, a vegetable dye, 54. 

 Reed, section of its stem, 90. 

 Reniform leaf (Lat. "kidney-shaped"), 98. 

 Reproduction. See Organs of. 

 | Resin, a vegetable secretion, 48. 

 Reticulated duct, 27. 

 Rhamnus infectoria (Gr. rhamnos a white thorn, 



and Lat. inficio to dye), 54. 

 Rhamnales, 191. 

 Rheum, the rhubarb, 41. 

 Rhizogens (Gr. rhiza a root, and ginomai to 



grow), Class III. of Lindley, 186. 

 Rhubarb, crystals found in the root of the, 41. 

 Rhuscoriaria (Lat. "rue," and corium leather), 



tannic acid obtained from, 50. 

 R. cotinus (Lat. JR. and cotinus a wild olive), 54. 

 Rice, starch cells of, 35, 39. 

 Rice paper of the Chinese, section of the, 16. 

 Ricinus communis (Lat. ricinus the name of an 



insect resembling the flower, and 



