198 



Index 



Poa (contd.) 



rigida, 129 (Figs. 144, 145) 

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



Pollen, 22 



Pollination, 22 



Polygonum Persicaria, 149 



Polypogon Beard-grass, 190 

 littaralis, 190 

 monspeliensis, 191 



Potentilla 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 vulgar is (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 Digrapkis 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) 



acelosella (Figs. 153, 154) 



crispus (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, one-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 ccerulea, 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 Air a caryophyllea 

 Slender Foxtail Alopecurus agrestis 

 Small Reed Calamagrostis, 89, 90 

 Soft Brome Bromus mollis, 81 

 Soft-grass Holcus, 106, 108 

 Sowing grass seeds, 180, 181 

 Sowthistle (Figs. 161, 162, 163) 

 Spartina stricta 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 Hordeum 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^ (Figs. 2, 3) 

 Stigmas, 13, 22 (Fig. 16) 

 Stolons, 3, 4 

 Stomata, 8, 21 



Struggle for existence, 171, 184 

 Sub-sessile almost sessile 



