De 
1912] 
dum, 36, 40; macrocarpon, 184; 
maculatum, 169, 170; margina- 
tum, var. strictum, 169; melicar- 
ium, 186; microcarpon, 172; min- 
utulum, 170, 171; multiflorum, 
172; oricola, 39, 40, 72; pilosum, 
171, 172; polyanthes, 172;  pro- 
cumbens, 173;  proliferum, 39; 
prostratum, 173; reptans, 173; 
Scribnerianum, 40, 184; sphaero- 
carpon, 40, 172; spretum, 40; 
stipitatum, 168, 169; strictum, 
169, 170; subvillosum, 40; tennes- 
seense, 37, 40; tsugetorum, 38, 40; 
umbrosum, 173; unciphyllium, var. 
thinium, 172; verrucosum, 168; 
villosum, 173; virgatum, 139, 182; 
Walteri, 167; Wrightianum, 29, 
170, 171, 175; yadkinense, 169, 170. 
Panieums of Essex County, Massa- 
chusetts, Some, 36. 
Parmelia Borreri, var. reducta, 89; 
caperata, 89; perlata, 89, 90; 
perforata, var. hypotropa, S9. 
Parmeliaceae, 89. 
Parnassia caroliniana, 241. 
Partridge Pea, 91. 
Paspalum, 174; Muhlenbergii, 20, 
1/4; psammophilum, 174, New 
Stations for, 174; setaceum, 20. 
Pea, Partridge, 91. 
Pediastrum  Boryanum, 115, 237; 
duplex, 237; tetras, 115, 237. 
Pedicularis flammea, 88. 
Pellia Neesiana, 224. 
Peltandra, 95, 102; alba, 102, 103; 
angustifolia, 103, 106; canadensis, 
104; hastata, 103, 105; hetero- 
phylla, 103, 106; latifolia, 104; 
sagittifolia, 102, 103; undulata, 
104; virginica, 104, Forms of, 102, 
var. angustifolia, 103, 104, forma 
angustifolia, 106, forma brachy- 
ota, 105, 106, forma hastifolia, 
105, 106, var. heterophylla, 103, 
106; forma heterophylla, 106, 
forma latifolia, 104, 106, forma 
rotundata, 104, 106. 
Pennsylvania, Galium labradoricum 
in, 199. 
Perkins, G. H., Vermont Botanical 
Club, Summer Meeting, 162. 
Phalaris, 178. 
Phegopteris hexagonoptera, 240. 
Phleum, 178; pratense, 92. 
Phoradendron flavescens, 81. 
Phragmites communis, 20. 
Physcia hispida, 90; parietina, 89; 
tribacea, 90. 
Index 
251 
Picea mariana, 80. 
Pine Barrens, A Flora of the New 
Jersey, 94. 
Pink-flowered Form of Lupinus per- 
ennis, 237. 
Pinus Banksiana, 79; resinosa, 79; 
rigida, 79, 89; sylvestris, 79. 
Planera aquatica, 81. 
Plants apparently new to the Maine 
Catalogue, 176; in Groton, Massa- 
chusetts, Rare, 234; new to Con- 
neetieut, Introduced, 163. 
Pleurisy-root, 91. 
Pleurogyne rotata, 230. 
Plum, Chickasaw, 198. 
Poa, 178; alpina, 87; annua, 177, 
178, 181, 183; coerulescens, 185; 
elongata, 186; flava, 185. 186; 
quinquefida, 185, 186; seslerioides, 
185, 186: Torreyana, 186. 
Poacoideae, 180. 
Polygala cruciata, 29; polygama, 28, 
79 
Polygonella articulata, 21, 79. 
Polygonum arifolium, 21; Careyi, 
28; tomentosum, 55. 
Polytrichum alpinum, 52; piliferum, 
47. 
Pond Flora of Cape Cod, 25. 
Pontederia, 31; cordata, 26. 
Populus alba, 20; heterophylla, 81. 
Porella rivularis, 18. 
Potamogeton, 26; amplifolius, 236, 
237; Robbinsii, 26. 
Potentilla fruticosa, 235, 240, 241. 
Preston, H. W., [Notice of Work], . 
163. 
Prionolobus, 223. 
Prize Essay, 116. 
Proserpinaca palustris, 31; 
nata, 31. 
Prunus, 196, 198; americana, 196, 
197; angustifolia, 197, 198, var. 
Watsoni, 196; cuneata, 135; mari- 
tima, 20; Watsoni, 196. 
Psedera quinquefolia, 21. 
Purple-fruited Ash, 192. 
Pyrus Bartramiana, 128, 129, 158; 
Botryapium, 122, 150, 153, 154; 
Neumanniana, 128, 131, 132; ova- 
lis, 123, 127, 144, 147; sanguinea, 
125, 138; Wangenheimiana, 128, 
131. 
pecti- 
Quercus imbricaria Michx. in Massa- 
chusetts, 34; lyrata, 81; mary- 
landica, 83; Michauxii, 81; Phellos, 
81; Robur, 20, 90; tinctoria, 89, 
90. 
