188 
Sand-binders, 13, 35, 36, 48, 102, 
107, 108 
Sand Cat’s-tail — Phleum 
arium 
Sand dunes, 35, 36 
Sand species, 29, 32, 36 
Sandy situations, 8, 29, 33 
Savannahs, 1, 38 
Scaberulous—slightly rough to the 
touch, 22, 45, 164 
Scabrid—rough to the touch, 22, 
47, 94 
Scarious—as if scorched by fire, 
92, 145 
Scents, 27 
Sclerenchyma—mechanical tissue, 
62, 65, 66, 67, 68, 69, 70, 71, 74, 
(6, 16, 79, 80 
Sclerochloa—Poa 
Sclerochloa maritima—Poa mari- 
tima; S. procumbens—Poa pro- 
cumbens ; 8S. rigida—Poa rigida 
Scorpion-grass—Myosotis 
Seutellum, 121, 123 
Sea Barley—Hordeum maritimum 
Sea Cat’s-tail—Phleum arenarium 
Sea-grass—Zostera 
Sea Hard-grass—Lepturus ineur- 
vatus 
Sea Lyme-grass—Elymus arenarius 
Sea Mat-grass—Psamma arenaria 
Sea Mat-weed—Psamma arenaria 
Sea Meadow-grass—Poa maritima 
Sea Poa—Poa maritima 
Sea Reed—Psamma arenaria 
Sea-side grasses, 27, 29 
Secondary roots, 121, 123, 
133 
Secund—turned to one side, 9, 89, 
108, 109, 114 
Sedges, 3, 4, 33, 35, 121 
Seed—strictly the contents of the 
caryopsis (fruit), but in practice 
the fruit and its adherent palez 
etc. (chaff) are termed ‘ seed,” 
119, 120, 121, 123, 124, 125, 127, 
128, 129, 130, 131, 1384, 185— 
L174 
Seed-coats, 121, 122 
Seedlings, 132, 133 
Semi-aquatic species, 28, 29 
Separation of fruits, 124 
aren- 
131, 
INDEX, GLOSSARY, 
Serrule-—minute tooth-like asperi- 
ties, 22. 91, 173 
Sesleria—Moor-grass, 22, 25, 63, 
64, 68, 90, 91, 93, 101; S. c@rulea, 
17, 42, 67, 108, 149, 151 
Sessile—sitting directly on an axis 
without an intervening stalk, 87, 
99, 107 
Setaceous—bristle-like, 16, 19, 20, 
21, 24, 45, 111, 113 
Setaria— Panicum 
Sexual organs, 134 
Shade action of grasses, 35 
Shade-grasses, 20, 28, 33, 34, 70 
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, 22515. 26, 123 
Sieglingia decumbens—Triodia de- 
cumbens 
Siliiceous—impregnated with flint— 
silex, 64, 65, 66 
Silky Bent-grass—<Agrostis Spica- 
venti 
Silvery Hair-grass—Aira 
phyllea 
Single-husked Fescue — Festuca 
uniglumis 
Slender Foxtail—Alopecurus agres- 
tis 
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 Holeus—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 
caryo- 
