330 
(water-pepper), 240, 243; vivi- 
parum, 288 
Polypodium vulgare (common poly- 
pody), 267, 291, 295 
Polypody—Polypodium vulgare 
Polytrichwm (hair-moss), 252 
Pondweed—Potamogeton spp. ; Can- 
adian—Hlodea canadensis ; horned 
—Zannichellia spp.; tassel— 
Ruppia maritima 
Poplar— Populus 
Poppy—Papaver spp.; horned or 
sea—Glaucium luteum 
Populus (poplar), 270, 293 
Potamogeton spp. (pondweeds), 233, 
236, 237 ; lucens (shining p.), 238 ; 
natans (broad-leaved p.), 235, 239 ; 
pectinatus (fennel-leaved p.), 235 
Potentilla alpestris (alpine cinque- 
foil), 259 ; anserina (silver-weed), 
260, 294 ; Crantzi (alpine cinque- 
foil), 259; Fragariastrum (barren 
strawberry), 294; reptans (creep- 
ing c.), 296; Sibbaldi, 288, 289 ; 
Tormentilla (tormentil), 251, 271, 
274, 285, 289, 296 
Poterium Sanguisorba (lesser-bur- 
net), 260, 264 
Primrose—Primula vulgaris 
Primula veris (cowslip), 264; vul- 
garis (primrose), 270, 294 
Privet—Ligustrum vulgare 
Prunella vulgaris (self-heal), 263, 270 
Prunus domestica (wild plum), 293; | 
Lauro -cerasus (cherry - laurel), 
293; spinosa (sloe, blackthorn), 
269, 270, 271, 272, 273, 293, 296 
Psamma arenaria (marram-grass), 
281, 282 
Pteris aquilina (bracken-fern), 251, 
259, 270 
Purslane, sea—Arenaria peploides 
and Atriplex portulacoides ; water 
—Peplis Portula 
Pyrola media, minor, rotundifolia, 
secunda, uniflora (wintergreens), 
274 
Pyrus Aria (whitebeam), 271, 272, 
273, 293; Aucuparia (mountain- 
ash, rowan-tree), 269, 271, 274; 
communis (pear), 293 ; torminalis 
(wild service-tree), 214 
Quercus spp. (oak), 244, 265, 266, 268, 
269, 270, 272, 293; pedunculata, 
270; robur, 270; sessiliflora, 270 
Quillwort—Jsoctes lacustris 
BRITISH PLANTS 
Ragged Robin—Lychnis Flos-cuculi 
Raphanus Raphanistrum (wild rad- 
ish), 216 
Rattle, red—Pedicularis sylvatica ; 
yellow—Rhinanthus Crista-galli 
Reed, common—Phragmites com- 
munis ; -mace—Typha latifolia 
Reseda lutea (wild mignonette), 261 ; 
Luteola (dyer’s-weed), 261 
Rest-harrow—Ononis arvensis 
Rhacomitrium lanuginosum, 289 
Rhamnus spp., 269, 273 ; catharticus 
(common buckthorn), 241, 293; 
Frangula (alder b.), 244, 271 
Rhinanthus Crista-galli (yellow rat- 
tle), 263 
Rhynchospora alba (beak-rush), 251 
Ribes spp., 244 ; Grossularia (goose- 
berry), 215; nigrum (black cur- 
rant), 215 ; rubrum (red c.), 215 
Rock-cress—Arabis spp. and Draba 
spp. : -rose—Helianthemum spp. 
Rocket, sea—Cakile maritima ; wall 
—Diplotaxis muralis 
Rosa spp. (rose), 270, 271, 293 
Rose—Rosa_ spp.; -bay—Zpilo- 
bium angustifolium ; guelder— 
Viburnum Opulus ; rock—Helian- 
themum spp.; -root—Sedum Rho- 
diola 
Rowan-tree—Pyrus Aucuparia 
Rubus Chamemorus (cloudberry), 
251, 253, 254, 255; fruticosus 
(bramble, blackberry), 251, 270, 
271, 274, 293 : 
Rue, meadow—Thalictrum flavum ; 
wall—Asplenium Ruta-muraria 
Rumex spp. (dock), 298; Acetosa 
(sorrel), 263, 288; Acetosella 
(sheep’s-sorrel), 251, 258, 271, 
289, 291, 296; crispus (curled 
dock), 263, 283, 295 ; Hydrolapa- 
thum (water d.), 243 ; obtusifolius 
(broad-leaved d.), 295 
Ruppia maritima (tassel-pondweed), 
276 
Ruscus aculeatus (butcher’s-broom), 
214, 273 
Rush—Juncus spp.; beak— 
Rhynchospora alba ; bul- —Scirpus 
lacustris and Typha latifolia ; 
club—Scirpus spp. ; flowering— 
Butomus umbellatus ; wood— 
Luzua spp. 
Sage, wild — Salvia Verbenaca; 
wood- —Teucrium Scorodonia 
