GLOSSARY AND GENEEAL INDEX TO VOL. II. 529 



Isostemonous. "Having the same number 

 of stamens as o£ sepals and petals 



Karyokinesis, The process of indirect 



division of the nucleus 

 Klinostat, 495 



Latent period, 511 



Leptof^orangiate. A term applied to 



those plants whose sporangia arise 



each from a single epidermal cell, 122 

 Leucoplasts. The plastids which form 



starch grains in parts of plants not 



exposed to light, 449 

 Ligule of grasses, 216 



Lycopodinae, 160 



Localisation of sensitiveness, 502, 504 

 Locitlicidal. Splitting down the dorsal 



sutures. Applied to the dehiscence of 



capsular fruits 

 Lodicules, 217 

 Lysigenous spaces. Such as are produced 



by the absorption or disintegration of 



cells 



Macrosporangia-development in Phane- 

 rogams, 171 



Macrospores. The larger spores borne 

 by heterosporous plants 



Manubrium, 63 



Marcescent. A term applied to the 

 calyx or corolla when it ^vithers after 

 pollination but does not become de- 

 tached 



Massula, 147 



Megaspores=macrospores 



Meiostemonous. Having fewer stamens 

 than petals 



Merismatic. Capable of division. A 

 term applied to groups or bands of 

 cells which undergo continuous multi- 

 plication 



Meristeles. The branches of the stele 

 which enter the leaves 



Meristem. A collection of cells which 

 increases continuously by cell-division 



Metaholism. The chemical changes as- 

 sociated with the life of protoplasm, 

 433 



Micropyle. The aperture left at the 

 apex of the ovule in consequence of 

 the integuments not completely en- 

 closing it 



Microsporangia- development in Phane- 

 rogams, 169 



Microspores. The smaller spores borne 

 by heterosporous plants 



Monadelphous. A term used to indicate 

 that the stamens of a flower are united 

 by the bases of their filaments 



Monandrous. Having only one stamen 



Monochlamydeous. Having only one 

 whorl of perianth leaves 



MoncEcious, A term applied to those 



Phanerogams which producestaminate 



and pistillate flowers upon the same 



plant. Also used to indicate gameto- 



VOL. II. 



phytes which bear both antheridia and 

 archegonia, 520 



Monopodial. A term applied to such 

 branch systems as have a main axis 

 produced by the continuous activity of 

 a single growing point 



Monostely. The condition in which the 

 centre of the axis of the plant is occu- 

 pied by a single stele which is con- 

 tinuous with the plerome 



Mycelium. The delicate network of 

 thread-like cells or ccenocites which 

 form the body of a fungus ^ 



Myrosin, 456 



Natural Orders, 5 



Nitrification, 437 



Nacellus. The body of the ovule, 171 



Nucleoplasm. The substance of which 



the nucleus is composed 

 Nutation, 476 

 Nyctitropic movements, 489 



Obdijilo&temonous. A term used to indi- 

 cate an andrcEciam, which consists of 

 two whorls of stamens, those of the 

 outer whorl being opposite to the 

 petals 



Occun-ence of Monochlamydeous flowers 

 in PolypetalaB and Gamopetals, 261 



Ochrece. The stipules of che Polygonacere 



Oidium, 73 



Ooblastema filament, 51 



Oogamous. Producing gametes of two 

 kinds, one male, the other female 



Oogoninm. The organ in which the 

 female gametes of the Thallophytes 

 are developed 



Oosphere. The female gamete before 

 fertilisation 



Oospore. The body formed by the fer- 

 tihsation of an oosphere. Often called 

 a zygote 



Operculum. The lid of the capsule of a 

 moss 



jrcnosHchies. The vertical ranks of the 

 ieaves upon a stem 



Orthotropous. A term applied to ovules 

 which grow vertically from the pla- 

 centa, so that the chalaza and the hilum 

 are close together at the base, and the 

 micropyle is at the opposite end or 

 apex 



Osmosis, 411 



Ostioles, 43 



Palea;. Scarious leaves which form the 

 outer covering of thei flowers of 

 grasses ; also scales which are found 

 at the bases of the flowers in the capi- 

 tula of certain Compositse. 



Pappus. The hairy or feathery calyx 

 of the flowers of the Oomposits and 

 allied orders 



Paraheliotropism, 486 



M M 



