198 



Index 



Poa (contd.) 

 rigida, 129 (Figs. 144, 145) 

 trivialis, 129, 161 (Figs. 141, 143) 



Pollen, 22 



Pollination, 22 



Polygonum Persicaria, 149 



Potypogon — Beard-grass, 190 

 Httoralis, 190 

 neonspeliensis, 191 



Potentilia monspeliensis (Fig. 171) 



Productivity (relative), 175 



Protandrous — when the pollen is ma- 

 ture before the stigma of the 

 same flower is ready for pollina- 

 tion, 22 



Proterogynous — term applied to a flower 

 in which the stigma is receptive 

 before the pollen of the same 

 flower is mature, 22 



Prunella vulgaris (Fig. 170) 



Psamma arenaria, 129 (Figs. 91, 146, 

 147) 



Pubescent — hairy 



Purchase of grass seeds, 162-168 



Purity of seeds, 163, 175 (see also under 

 each species in Chapter VIII) 



Putting greens, 178 



Quaking-grass — Briza, 77, 78 

 Quantities of seed to sow, 173, 174, 175 



Raceme, 15 



Rachilla, 16 (Fig. 19) 



Rachis of spikelet, 16 (Figs. 18, 19) 



Radicle, 18 (Fig. 20) 



Ranunculus repens (Fig. 155) 



Rat's-tail Fescue — Festuca Myurus, 100 



"Real Value" of Seed, 166, 175 



Reed Canary-grass — Digraphis arun- 



dinacea, 95 

 Rhizomes, 3, 4, 51 (Figs. 5, 33, 146) 

 Rib-grass — Plantago lanceolata (Fig. 166) 

 Ribs, 7, 8 (Figs. 9-11) 

 Ridges, 7, 8 

 Root-cap (Fig. 20) 

 Root-sheath (Fig. 20) 

 Roots, 1, 2, 20 (Figs. 1, 22, 23) 

 Rough-stalked Meadow-grass — Poa tri- 

 vialis, 129, 161 

 Rudimentary flowers (Figs. 114, 116) 

 Rumex acetosa (Fig. 152) 



acetosella (Figs. 153, 154) 



erispus (Fig. 151) 

 Rye-grass — Lolium, 113-116 



Sand-binders, 129 (Fig. 146) 

 Sand species, 24 

 Scabrid — rough to the touch 

 Sclerenchyma — thick-walled tissue, 4, 

 7, 8 (Figs. 4, 10, 11) 



Scutellum, 18 



Sea-side grasses, 24 (Figs. 91, 146) 



Secund — turned to one side, ttne-sided 



Seed-bed, 180 



Seed-mixtures, 168-179 



Seed-prices, 166 



Seed production, 168. See also Chapter 



VIII 

 Seeds of grasses, 16-18 (natural size, 



Fig. 26) 

 Seed statistics, 174 

 Self-heal (Fig. 170) 

 Semi-aquatic grasses, 25 

 Seminal roots, 20 

 Serrulate — bearing minute tooth-like 



asperities 

 Sesleria caerulea, 131 (Fig. 148) 

 Sessile — without a stalk, situated di- 

 rectly on the axis 

 Setaceous — bristle-like 

 Setaria, 191 

 glauca, 191 

 verticillata, 191 

 viridis, 191 

 Sexual organs, 12-14 (Fig. 16) 

 Shade-grasses, 25, 26 

 Shapes of leaves, 10 (Fig. 12) 

 Shapes of shoots, 5, 6 

 Sheath, 4-6 



Sheep's Fescue — Festuca ovina, 101, 150 

 Sheep's Sorrel (Figs. 153, 154) 

 Sherardia arvensis (Fig. 172) 

 Silky Bent-grass — Agrostis Spica-venti 

 Silvery Hair-grass — Aira caryophyllea 

 Slender Foxtail — Alopecurus agrestis 

 Small Reed — Calamagroslis, 89, 90 

 Soft Brome — Bromus mollis, 81 

 Soft-grass— Holcus, 106, 108 

 Sowing grass seeds, 180, 181 

 Sowthistle (Figs. 161, 162, 163) 

 Spartina striata — Cord-grass, 191 

 Specification of seed-mixtures, 172 

 Spikate inflorescence, 15, 34, 35 (Fig. 



121)' 

 Spike, 15 (Figs. 27. 28, 117, 121, 122) 

 Spikelet, 12, 14 (Figs. 15, 18, 19) 

 Spike-like panicle, 35 (Fig. 46) 

 Split sheath, 5 (Fig. 7) 

 Squirrel-tail grass — Hordeutn mariti- 



mum, 111 

 Stamens, 13, 22 (Fig. 16) 

 Staminate — a flower having stamens 



but no ovary, see Holcus 

 Starch grains, 39 (Figs. 24, 25) 

 Stems, 2-4 (Figs. 2, 3) 

 Stigmas, 13, 22 (Fig. 16) 

 Stolons, 3, 4 

 Stomata, 8, 21 



Struggle for existence, 171, 184 

 Sub-sessile — almost sessile 



