AND SYNONYMS 



181 



91, 93, 103, 148, 158 ; JD. glome- 

 rata, 7, 16, 17, 27, 32, 33, 34, 

 41, 65, 66, 69, 74, 109, 149, 

 130, 151 



Darnel — Lolium perenne — Lolium 

 temulentum 



Decumbent Heath-grass — Trlodia 

 decumhens 



Dehiscent fruits, 123 



Depauperated — starved and con- 

 sequently dwarfed, 109 



Deschampsia ccespitosa — Aira cce- 

 spitosa 



Deschampsia flexuosa — Aira flex- 

 uosa 



Digitaria — Panicum 



Digitate — spread out like fingers, 

 15 



Digraphis — Eeed-grass, 6, 11, 13, 

 26, 40, 41, 51, 55, 69, 73, 75, 

 90, 91, 92, 103, 131, 139, 146, 159; 

 D. arundinacea, 6, 16, 23, 29, 

 32, 54, 64, 75, 103, 139, 150 



Dimensions of grasses, 6 



Dinochloa, 6 



Dioecious, unisexual, the male and 

 female flowers being on separate 

 plants, 119 



Disarticulation of fruits, 124 



Dissemination, 125, 127 



Distichous — in two ranks on the 

 axis, 106 



Distribution of grasses, 2, 37, 38 



Distribution of seeds, 124 — 127 



Distribution of sexes, 119 



Ditches, grasses of, 28, 29 



Dog's-tooth grass — Oynodon Dacty- 

 lon 



Dorsal awn, 92, 112, 116, 130, 159 



Double seed — grass "seed" where 

 the remains of a second flower 

 come away with the first, 152, 

 153 



Downs, grasses of, 29 



Downy Oat — Avena pubescens 



Dry leaves, 21 



Dry situations, 24, 26, 29 



Dry soils, 29, 32 



Duration, 10 



Dwarfed species, 6 



Early Hair-grass — Aira prcecox 



Ears, 19, 22, 57, 59 



Echinochloa — Panicum 



Effects of grasses on soil, 35, 

 36 



Egg-cell, 121 



Eleusine, 123 



Elliptical shoot-section, 16, 44 



Elymus — Lyme-grass, 6, 13, 14, 

 21, 22, 25, 36, 48, 57, 63, 65, 69, 

 79, 90, 92, 102, 170; B. arenarius, 

 6, 29, 33, 35, 36, 48, 66, 67, 

 108, 149, 750 



Embryo, 121, 131, 133 



Embryo-sac, 121 



Embryonic bud — plumule, 123 



Embryonic roots, 123, 133 



Endosperm, 120, 121, 122, 123 



Energy stored in leaves, 2, 3 



Entire — not cut : with unbroken 

 outline, 19 



Entire sheath, 17 



Entire-sheathed grasses, 17, 39, 

 113, 115 



Epidermis, 25, 36, 62—67, 70, 76, 

 122 



Equitant — one folded leaf strad- 

 dling over another, 39, 41 



Briophorum, 3 



Extra-vaginal shoots, 12 



False Oat — ArrJienatliermn aven- 



aceum 

 Female flowers, 89 

 Fertile flowers, 86, 89, 90 

 Fertilisation — the fusion of the 

 nucleus of the pollen-tube with 

 that of the egg-ceU, 121 

 Fescue— Festuca, 115, 130, 137, 



144, 148, 151, 172 

 Festuca— FsBcue, 2, 6, 7, 15, 21, 25, 

 36, 49, 51, 53, 90, 91, 92, 108, 109, 

 110, 113, 114, lie, 124, 144, 147; 

 F. arundinacea — var. of i*". elatior, 

 144, 151 ; F. calamaria — F. 

 sylvatica ; F. duriuscula — var. 

 of F. ovina, 46, 69, 78, 80, 147, 

 172, 173; F. elatior, 6, 7, 11, 

 13, 14, 18, 19, 22, 25, 28, 32, 44, 

 50, 51, 63, 64, 82, 84, 108, 111, 

 115, 116, 128, 131, 143, 144; 

 F. gigantea — Broinus giganteus ; 

 F. heterophylla — var. of F. ovina, 



