1922] 
Pentstemon hirsutus, 185; pub- 
escens, 185. 
Perilla frutescens, var. crispa, 119. 
Petasites palmatus, 208. 
Phaeosporaceae, 3. 
Phalaris arundinacea, forma picta, 
185, forma variegata, 185. 
Phaseolus diversifolia, 99; poly- 
stachyus, 99, 117. 
Philadelphia, Muscari comosum 
a new Introductiom found in, 
16. 
Phormidium autumnale, 104, 107; 
laminosum, 103; Retzii, 103, 107. 
Phragmites, 55, 56, communis, 161; 
The generic Name, 55. 
Physalis heterophylla, var. 
bigua, 184; viscosa, 100. 
Physocarpus opulifolius, 116. 
Picea canadensis, 98, 112. 
Pinguicula, 103. 
Pinus Banksiana, 160; 
112; Strobus, 160. 
Flat from Nantucket, Another, 
41. 
Plantago altissima, 204; eriophora, 
204; hungarica, 204; lanata, 204; 
lanceolata, 203, 204, § capitata, 
204, g capitellata, 204, 5 lanugi- 
nosa, 204, y pumila, 204, var. 
sphaerostachya, 203, 204, var. 
sphaerostachya, forma eriophora, 
203, 204; media, var. Monnieri, 
119; microcephala, 204; sphaero- 
stachya, 204. 
Plantain, Rattlesnake, 39. 
Pleurotaenium, 219; coronatum, 
219, var. fluctuatum, 219; cren- 
ulatum, 219; nodosum, 219; 
trabecula, 219; truncatum, 219. 
Plumbaginaceae, 232. 
Poa saltuensis, var. microlepis, 161. 
Podophyllum peltatum, 184. 
Pogonia affinis, 149; pendula, 185; 
trianthophora, 185. 
Polemoniaceae, 98. 
Polygala cruciata, 57, 88; Senega, 
184 
am- 
resinosa, 
Polygonella articulata, 87. 
Polygonum Bistorta, 173; hydropi- 
peroides, 173, 174, var. digita- 
tum, 173; hydropiperoides X 
robustius, 173; Muhlenbergii, 
173; pennsylvanicum, 87, var. 
genuinum, 173, var. laevigatum, 
173; puritanum, 173; robustius, 
173, 174; tenue, 185. 
Index 
253 
Polymosphism in Enteromorpha 
crinita, Ecological, 50. 
Polypodium, 133; australe, 141; 
californieum, 127-131, 134, 136, 
140, var. intermedium, 128, 129, 
134, 136, 140, var. Kaulfussii, 
136, 140; cambricum, 141; falca- 
tum, 127-132, 134, 136, 139; 
Fauriei, 135; Glycyrrhiza, 127, 
129, 136, 139; hesperium, 127, 
129-131, 134, 136—138; incanum, 
133; intermedium, 136, 139; 
japonieum, 135; occidentale, 127, 
132, 136, 139; Quercinum, 131; 
virginianum, 125-128, 130—133, 
135, 136, 141, and P. vulgare, 
125, forma acuminatum, 141, 
forma alato-multifidum, 142, 
forma  bipinnatifidum, 141, 
227, forma brachypteron, 141, 
forma chondroides, 142, forma 
Churchiae, 142, forma deltoi- 
deum, 141, forma elongatum, 
141, forma subsimplex, 141; 
vulgare, 125-137, 140, 141, var. 
Acutum-Stansfieldii, 128, 139, var. 
alato-multifidum, 142, 8 ameri- 
canum, 126, 141, var. angusta- 
tum, 141, var. attenuatum, 111, 
139, 141, forma auritum, 185, 
var. auritum, 141, var. bifido- 
multifidum, 142, forma brachyp- 
teron, 141, var. cambricum, 136, 
141, 142, 227, var. Churchiae, 
142, var. columbianum, 137, 138, 
var. commune, 137, 139, forma 
deltoideum, 141, forma elonga- 
tum, 141, var. falcatum, 139, 
forma hastatum, 141, var. hes- 
perium, 137, var. hibernicum, 
141, var. intermedium, 139, 
var. intermedium, forma pro- 
jectum, 140, var. japonicum, 
135, var. Kaulfussii, 140, y oc- 
cidentale, 126, 136, var. occi- 
dentale, 127, 134, 139, var. per- 
pusillum, 138, forma pumilum, 
138, var. pygmaeum, 138, forma 
rotundatum, 137, 138, 141, var. 
rotundatum, 134, 137, 138, var. 
semilacerum, 142, var. serratum, 
128, 134, 140, 141, var. sinuatum, 
142, var. transsilvanicum, 134, 
139, forma variegata, 130, var. 
virginianum, 126, 141; vulgare 
acuminatum, 141, vulgare vir- 
ginianum, 130. 
