1918] 
97, 116; subvillosum, 102; verru- 
cosum, 115; virgatum, var. cu- 
bense, 116. 
Parmeliopsis aleurites, 40. 
Parnassia caroliniana, 97, 101. 
Parosela, 171; Dalea, 171. 
Peanut, 165. 
Pease, A. S., Nuttall and Pickering 
in the White Mountains, 39. 
Pedicularioides, 70. 
Pedicularis, 134 ; lanceolata, 98. 
Pennell, F. W., The Flower of 
Agalinis — A Correction, 199; A 
Plea for Aureolaria, 133. 
Perezia, 151; adventive in Massa- 
chusetts, A new, 150; aletes, 151. 
Philadelphia, Eragrostis peregrina a 
frequent Plant about, 173. 
Physcia stellaris, 40. 
Physocarpus, 18; opulifolius, 18. 
Picea canadensis, 186, 188. 
Pickering in the White Mountains, 
Nuttall and, 39. 
Pilosella, 201, 202; novae-angliae, 
201-203; Richardsonii, 202, 203. 
Pinus Abies, 187; balsamea, 186, 187, 
Banksiana, 101; canadensis, 186, 
187, 188. 
Pisum, 171; sativum, 171. 
Plantaginaceae, 61. 
Plants, Additional Wool Waste, 20; 
established in Middlesex County, 
Massachusetts, Exotic, 204; from 
South Weymouth, Massachusetts, 
115; Preliminary Lists of New 
England, — XXVI. 182; Some 
Connecticut, 97; with double- 
faced corrugated Boards, Pressing, 
153. 
Plea for Aureolaria, 133. 
Poa, 122; alsodes, 122; autumnalis, 
122, 126, 127; debilis, 122, 125; 
from eastern North America, Some 
new Species and Varieties of, 122; 
paludigena, 126, 127; alustris, 
. 127; reflexa, 126, 127; s tuensis, 
122, 125, var. ‘microlepis, 124, 
125; sylvestris, 122, 127, var. 
since 127. : 
Poly onum Raii, 104. 
od ge umbilicalis, 143, 144. 
Potamogeton filiformis, 192; Further 
T Notes on, 191; marinus, 192; 
moniliformis, 192; pusillum, 192: 
setaceus, 192; vaginatus, 191, 192; 
zosteraceus, ‘192. . 
Potentilla, 55; Anserina, 55; ar- 
gentea, 55; arguta, 55; canaden- 
Index 
217 
sis, 55, var. simplex, 55; fruticosa, 
55; intermedia, 55; monspeliensis, 
55, var. norvegica, 55; pacifica, 55; 
palustris, 55, forma subsericea, 55, 
105, var. villosa, 55; pumila, 55, 
forma ochroleuca, 56; recta, 56; 
reptans, 56; tridentata, 56, 105. 
Preliminary Lists of New England 
Plants,— XXVI. 182. 
Pressing Plants with double-faced 
corrugated paper Boards, 153. 
Prickly Lettuce, 180. 
Prunus, 56; americana, 56; avium, 
56; Cerasus, 56; cuneata, 56; 
instititia, 56; maritima, 56; 
Mahaleb, 56; nigra, 56; pennsyl- 
vanica, 57; Persica, 57; serotina, 
57; virginiana, 57. 
Puccinellia paupercula alaskana, 97, 
116; paupercula, var. longi- 
glumis, 97. 
Pyrola asarifolia, 101. 
Pyrus, 57; americana, 57; arbuti- 
_ folia, 57, var. atropurpurea, 57, 
105; var. melanocarpa, 105; Au- 
cuparia, 57; Aucuparia X melano- 
carpa, 57; baccata, 57; communis, 
57; Malus, 57; melanocarpa, 57. 
Quercus, 134; rubra, 103. 
Ramalina fasciata, 40. 
Range of Botrychium lanceolatum, 
The American, 19. 
Ranunculaceae, 182-184. 
Ranunculus abortivus, 183, 185, var. 
eucyclus, 183, 193; acris, 183, 184; 
allegheniensis, 183, 194, 195; aqua- 
tilis, var. capillaceus, 183, 185; 
bulbosus, 183, 184;  circinatus, 
183; Cymbalaria, 183, 193; del- 
phinifolius, 183, 196, 197; fascicu- 
laris, 183, 194, 195; Ficaria, 183, 
184; hispidus, 183, 193; lagicaulis, 
183, 193; longirostris, 183, 196, 
197; micranthus, 183, 194, 195; 
multifidus, 104; nnsylvanicus, 
183, 193; Purshii, 101, 104, 183, 
196, 197; recurvatus, 183, 185; 
repens, 183, 184, var. erectus, 183, 
var. glabratus, 183, var. lineari- 
lobus, 183, var. pleniflorus, 183, 
var. villosus, 183; reptans, 183, 
193, var. ovalis, 183, 196, 197; 
sceleratus, 184, 193; septentriona- 
lis, 184, 193. 
Report of Committee on floral Areas, 
181, 193. 
