230 
188; sagittifolius, 186; sericeus, 
187;  subintegerrimus, 187; 
variegatus, 187, 188; vulgaris, 
184, 185. 
Nyphar, 185; advena, 186; inter- 
medium, 187; luteum, 186, £ 
Kalmianum, 186; pumilum, 186. 
Nyssa, 190; sylvatica, 119. 
Oak, 31, 49, 107; Black-jack, 49; 
Willow, 49. 
Oat Grass, 76. 
Odontoschisma, 152. 
Olacaceae, 69. 
Omission in the preliminary List of 
New England Ranunculaceae, 104. 
Onoclea, 175; nodulosa, 175, 179; 
sensibilis, 175; Struthiopteris, 178, 
179. 
Ophelia minor, 198. 
Ophrys spiralis, 10. 
Orchids, 192. 
Orchis rotundifolia, 65. 
Orobanche uniflora, 202. : 
Oryzopsis asperifolia, 200. 
Osmorhiza Claytoni, 200. 
Osmunda, 176; cinnamomea, 119; 
regalis, 179, var. spectabilis, 176, 
179; spectabilis, 179; Struthiop- 
teris, 179. 
Osmundaceae, 173. 
Ostrya, 191; virginiana, 190; vir- 
ginica, 190. 
Oxalidaceae, 79, 170. 
Oxalis, 79; Acetosella, 79; ameri- 
cana, 79, 199, 200; corniculata, 79, 
170; europaea, 79; filipes, 79; 
me 79; stricta, 79; violacea, 
9. 
Oxypolis, 182; rigidior, 119. 
Padina Pavonia, 207. 
Padus, 190. 
Panicum barbipulvinatum, 110, 111; 
capillare, 110-112, var. agreste, 
111; capillare brevifolium, 111; 
eapillare, var. minimum, 112, var. 
occidentale, 112, 8 sylvaticum, 112, 
var. vulgaris, 111; Gutter!’ 110, 
114; latifolium, 201; longifolium, 
143; lucidum, 119; minimum, 112, 
114; philadelphicum, 110-112,114; 
porphyrium 112;  soboliferum, 
114; spretum, 73; Torreyi, 112; 
Tuckermani, 111, 112, 114; vir- 
gatum 115; virgatum cubense, 
115. 
Panicum § Capillaria, 111, in New 
England, 110. 
Rhodora 
[DECEMBER 
Paper Birch, 50. 
Paronychia argyrocoma, var. albi- 
montana, 19. 
Paspalum circulare, 115; psammo- 
philum, 115. 
Pedieularis canadensis, 199. 
Pellaea densa, 124. 
Pellia Neesiana, 169. 
Peltandra, 73, 192; virginica, 192. 
Pennsylvania, Discovery of Trisetum 
spicatum in, 128; Flora of north- 
eastern, 172. 
Persimmon, 49. 
Peucedaneae, 182. : 
Phaeocephalum, 10. 
Phanerotaenia, 181, 182; a new 
Genus of Umbelliferae, 181; tex- 
ana, 182. 
Phegopteris, 176; Dryopteris, 179, 
200; hexagonoptera, 179; poly- 
podioides, 179, 200; Robertiana, 
179. 
Phelps, O. P., Ranunculus Boreanus 
in eastern New York, 208. 
Philotria angustifolia, 115, 218; cana- 
densis, 114; Further Notes on, 218. 
Phleum pratense, 170. 
Phoradendron, 50; flavescens, 49. 
Phyllitis, 177, 179; Scolopendrium, 
177, 179. 
Picea alba, 41; canadensis, 41, 44, 
109; glauca, 109; mariana, 43, 44; 
nigra, 43. 
Pilea pumila, 170. 
Pimpernel, Water, 191. 
Pine, 107; Banksian, 44-49, 52, 65; 
Douglas, 31; Jack, 52; Pitch, 46, 
50; Scrub, 50, 51; Short-leaf, 49; 
White, 50. 
Pinus Balsamea, 109; Banksiana, 
42-54, 60-65, and Thuja occiden- 
talis, Lithologieal Factors limiting 
the Ranges of, 41; canadensis, 51, 
108, 109; divaricata, 53; echinata, 
49; glauca, 109; rigida, 50. 
Pitch Pine, 46, 50. 
Plagiochila, 161. 
Plans for 1919 Spring Field Trip of 
the New England Botanical Club, 
86. 
Plantago, 28; major, 170. es 
Plantaginaceae, 170. 
Plants, Some Connecticut, 114. 
Platanus occidentalis, 189. 
Pleiotaenia, 181; Nuttalli texana, 
181. 
Plenosporium Borreri, var. fascicu- 
latum, 203, 204, 206. 
Pleurogyna, 194; sulcata, 195. 
