240 
Phegopteris Dryopteris, 219; hexagonop- 
tera, 9, 219; polypodioides, 192, 219. 
Philadelphus coronarius, 106. 
Phlox paniculata, 107; pilosa in Connec- 
ticut, 76; subulata, 224. 
Phormidium majus, 198. 
Phryma leptostachya, 220. 
Phyllitis zosteraefolia, 127. 
Phyllophora rubens, 127. 
Physalis heterophylla, 221; philadelphica, 
47; virginiana, 224. 
Physarum bivalve, 128; cinereum, 128, 
129; contextum, 128;  didermoides, 
128; globiferum, 129; leucopus, 128, | 
129; murinum, 128; nutans, 128, 129; 
virescens, 128; viride, 128. 
Physocarpus opulifolius, 106. 
Picea Mariana, 183; nigra, 183; rubra, 
FOI, 
Picris echioides, 104. 
Pied coq, 167. 
Pimbina, 168. 
Pimpinella Anisum, 159, 168; integer- 
rima, 159. 
Pineapple-weed, 18. 
Pinus Banksiana, 135, 136, on Mt. Desert 
Island, 135; inops, 104; resinosa, 183; 
rigida, 130, 135. 
Pissenlit, 168. 
Plagiothecium denticulatum, 35; Mueller- 
ianum §4. 
Plant-names of the Madawaska Acadians, 
166. 
Plantago media, 47; patagonica, 82, 165. 
Plants about Williamstown, 24; from 
Eastern Slope of Mt. Equinox, 220; in- 
troduced by Minot Pratt, at Concord, 
Massachusetts, 168. 
Platanus occidentalis, 221. 
Pleurotus olearius, 45. 
Plymouth, New Hampshire, Mosses of, 
53. 
Pos alsodes, 165; compressa, 201; de- 
bilis, 183; nemoralis, 192. 
Pocono Plateau, Flora of, 182. 
Podophyllum peltatum, 171. 
Podostemon cerataphyllum, 186. 
Pogonatum alpinum, 34, 35; capillare, 35. 
Pogonia affinis, 165; ophioglossoides, 
200; verticillata, 82, 165. 
Pohlia Lescuriana, 54. 
Poisoning, A Case of Boletus, 21; by Aga- 
ricus illudens, 43. 
Pollution of Water - supplies by Algae, 
Polyembryony in Opuntia vulgaris, 127. 
Polygala brevifolia, 213, 214; cruciata, 
213; Nuttallii, 104, 213, 214,230; pauci- 
Rhodora 
[ DECEMBER 
folia, 173, 213, 223; polygama, 213, 
214; sanguinea, 213, 214; Senega, 40, 
213; verticillata, 104, 213; Violet- 
flowered Form of Fringed, 173. 
Polygalaceae, List of New England Spe- 
cies, 213. 
Polygonatum giganteum, 170, 230. 
Polygonella articulata, 179. 
Polygonum acre, 203; Careyi, 43, 184; 
cilinode, 184; cuspidatum, 185; hydro- 
piperoides, 43, 205; lapathifolium, 82, 
97; ramosissimum, 220; virginianum, 
82; Zuccarinii, 185. 
Polypodium, 219. 
| Polyporus pergamenus, Peculiar State of, 
136. 
Polysiphonia, 124; Olneyi, 70; vestita, 
127. 
Polytrichum gracile, 53; juniperinum, 34; 
ohioense, 55; piliferum, 34, 35. 
Pontederia cordata, 184. 
Populus balsamifera, 39, 167; monilifera, 
39, 103; tremuloides, 168. 
Porphyra coccinea, 127. 
Porter, Thomas C., Flora of the Pocono 
Plateau, 182. 
Potamogeton Oakesiana, 183; perfoliatus, 
201, 
Potentilla argentea, 184; palustris, 184; 
recta, 43, 75, 81; tridentata, 170, 184; 
New Station for, 90, 
Poterium canadense, 81; sanguisorba, 47. 
Pottia littoralis, 80; Randii, 78, 8o. 
Pratt, Minot, Plants introduced at Con- 
cord, Massachusetts, by, 168. 
Préle, 167. 
Preliminary Lists of New England Plants, 
— I. Ericaceae, 93; II. Umbelliferae, 
159; III. Antennaria, 160; IV. Cista- 
ceae, Elatinaceae, Hypericaceae, 212; 
Anacardiaceae, Sapindaceae, Polygal- 
aceae, 213. 
Prenanthes alba, 220. 
Prolific fringed Gentian, A, 11. 
Proserpinaca palustris, 184. 
Prunus Americana, 39; avium, 220; Ma- 
haleb, 69; virginiana, 168. 
Ptelea trifoliata, 39, 104. 
Pterigynandrum filiforme, 54. 
Pteris aquilina, 219. 
Pterospora Andromedea, 93. 
Ptilidium ciliare, 34, 35. 
Pubescent Capsules of Oenothera pumila, 
173. 
Purnals, 167. 
Pycnanthemum lanceolatum, 82; 
cum, 104. 
Pylaisella intricata, 55; velutina, 55. 
muti- 
