Shapes of caryopsis, 127 Shapes of leaves, 4, 19, 20 Shapes of shoot, 16 Sharp-edged shoots, 16 Sheath, 5, 8, 12, 15, _16_, 17, _18_, _19_, 20, 22, 51, 95, 133 Sheep’s Fescue--_Festuca ovina_ Shelving sheath-margin, 22 Shoot, 10, 12, 15, 16, 123 _Sieglingia decumbens_--_Triodia decumbens_ Siliceous--impregnated with flint--silex, 64, 65, 66 Silky Bent-grass--_Agrostis Spicaventi_ Silvery Hair-grass--_Aira caryophyllea_ Single-husked Fescue--_Festuca uniglumis_ Slender Foxtail--_Alopecurus agrestis_ Small grasses, 7 Small Reed--_Calamagrostis_ Smooth Brome--_Bromus racemosus_ Sociable plants, 36 Sod, 37 Sodium chloride, 33 Soft Brome--_Bromus mollis_ Soft-grass--_Holcus_ Soft Holcus--_Holcus mollis_ Soil formation, 36 Soil protection, 36 Solid leaves, 46 Solid stems, 4 Sour soils, 33 _Spartina_--Cord-grass, 69, 87, 90, 99, 105; _S. stricta_, 27, 31, 78 Spear, 123, 132 Spikate inflorescence, 99, 106 Spike, _9_, 87, 88, 90, 99, 100, 101, 102, 106, 108 Spiked Fescue--_Festuca loliacea_ Spikelet, 9, _84_, _85_, +86+, _87_, 88, +89+, +90+, _93_, _94_, 95, 97, 99-118, 119, 120, 123, _124_ Spike-like panicle, _9_, 88, 90, 102 Spinescent leaf, 22 _Spinifex_, 125 Split sheath, 5, 17, _18_, _19_ Split-sheathed grasses, 17, _18_, _19_, 45, 50 _Sporobolus_, 123, 134 Squirrel-tail grass--_Hordeum maritimum_ Stamen, 86, _87_, 89, _93_, 94, 95, _96_, 97, 102, 103, 119 Staminate--a flower with stamens and no ovary, 100, 105, 106 Starch, 120, 121, 122 Stem, 4, 6, 8 Steppes, 1, 36, 38 Stigma--stigmatic plumes, 86, _87_, _93_, 94, 96, 97, +119+, _120_, 121 _Stipa_, 36, 96, _126_; _S. capillata_, 125; _S. pennata_, 32, 125; _S. spartea_, 125 Stolon, 10, 12, 35, 114 Stoloniferous grasses, 8, 13, 14, _15_ Stomata, 25, 36, 62, 64, 65, 67, 70, 73, 77, 80, 95 Strand-plants, 36 Stringy roots, 8 Striped grass--_Digraphis arundinacea_ Struggle for existence, 2, 37, 38 Style, 94, 97, 99 Sub-acute--hardly pointed, 142 Sub-sessile--very shortly stalked, so as to be all but sessile, 99, 106 Sub-terminal awn, 95, 115, _129_, 130, _150_, 151, _152_, 162, 163-168, _169_ Subulate--awl-shaped: stouter than setaceous, 19, 20, 21, 70, _71_, 79 Sugar, 120, 121, 122 Sugar-cane, 1 Sun-plants, 36 Sweet-tasting grasses, 39 Sweet Vernal grass--_Anthoxanthum odoratum_ Sympodium, 11 Tall Brome--_Bromus giganteus_ Tall Fescue--_Festuca elatior_ Tapering leaves, 21 Tastes, 27 Temperate species, 2 Terete--cylindrical and gradually tapering, 6, 54, 163, 171 Terminal awn, 92, 111, 115, 116, _126_, +130+, 162, 168-174, _173_ Texture of leaf, +21+ Three-flowered spikelets, 90 Timothy--_Phleum pratense_ Tomentose--softly hairy, 59 Transpiration, 20 Transverse sections of leaves, _16_, _23_, _24_, _63_, _64_