254 
Polypody, 125, 133, Common, 132. 
Pontederia cordata, var. angusti- 
folia, 114. 
Ponthieva racemosa, 149. 
Populus tacamahacca, 184. 
Porthretria, 51. 
Potamogeton alpinus, 184; ameri- 
canus, 112; amplifolius, 160; 
bupleuroides, 86, 98; confer- 
voides, 160, 186; dimorphus, 160; 
Friesii, 184; hybridus, 86; natans, 
112; Oakesianus, 62, 160; per- 
foliatus, 98; pulcher, 86, 160; 
praelongus, var. angustifolius, 
112; Tuckermani, 186. 
Potentilla pumila, 175, 185. 
Prasiola fluviatilis, 104, 109. 
Preliminary Report on the Des- 
mids of Connecticut, 213, 236. 
Prenanthes nana, 208; Serpen- 
taria, 185. 
Pressing Indian Pipes 
Discoloration, 225. 
Primula, 233; farinosa, var. macro- 
E» 179; officinalis, 118; veris, 
33 
without 
Primulaceae, 232. 
Proserpinaca palustris, 179; pectin- 
ata, 179. 
Prunus cuneata, 99; maritima, 
forma flava, 111; pumila, 99; vir- 
giniana, var. leucocarpa, 117. 
Psilocarya corymbifera, 148; nitens, 
86; scirpoides, 86. 
Pterigynandrum filiforme, 123. 
Ptilota serrata, 3. 
Puccinellia, 100; distans, 113; fasci- 
eulata, 100. 
Pyrola, 155; americana, 155; chlor- 
antha, 179, var. convoluta, 155, 
var. paucifolia, 179; elliptica, 155; 
rotundifolia, var. americana, 155, 
var. arenaria, 179; secunda, 155. 
Pyrus arbutifolia, 174. 
Quercus aquatica, 79, var. lauri- 
folia, 78; arenicola, 77, var. 
integra, 78; borealis, 173, var. 
maxima, 173; coccinea, 185; fal- 
cata, 99; hybrida, 77, 78, ilici- 
folia, 58; laurifolia, 77, 78; macro- 
carpa, 184; moultonensis, 78; 
nigra, 77; nigra heterophylla, 
79; obtusa, 77, 78; obtusa obo- 
vatifolia, 78; phellos, 79; phellos 
X Q. Shumardii, 78; prinoides, 
87; rhombica, 78, var. obovati- 
Rhodora 
[DECEMBER 
folia, 78; rubra, 99, 173, var. 
ambigua, 173, var. runcinata, 
99; Shumardii, 79. 
Ranunculus  allegheniensis, 116; 
cireinatus, 184; delphinifolius, 
182; repens, var. pleniflorus, 116; 
reptans 116. 
Rattlesnake Plantain, 39. 
Reports on the Flora of the Boston 
District, —cXXV. 92, XXXVI. 
152, XXXVII. 231. 
Reseda alba, 209. 
Rhabdonia tenera, 2. 
Rhacomitrium aciculare, 122; het- 
erostichum, 123; heterostichum 
alopecurum, 122; heterostichum 
gracilescens, 122; microcarpum, 
122, 123; sudeticum, 123. 
Rhexia virginica, 177. 
Rhizoclonium Selkirkii, 109. 
Rhizoctonia repens, 41. 
Rhododendron, 155; canadense, 
155; canescens, 155; maximum, 
118, 155; nudiflorum, 155, 185; 
Vaseyi, 155; viscosum, 155, var. 
glaucum, 155, var. nitidum, 155. 
Rhodophyceae, 110. 
Ribes triste, var. albinervium, 116, 
184. 
Riccia fluitans, 214. 
Rosa acicularis, 99, 181; carolina, 
var. setigera, 176; carolina X 
nitida, 176; nitida X palustris, 
176; nitida X virginiana, 176; 
obovata, 176. 
Rotala ramosior, 88. 
Roya, 216; obtusa, 216. 
Rubiaceae, 43, 44. 
Rubus abbrevians, 176; alleghen- 
iensis, 175; amnicola, 175; An- 
drewsianus, 181; arcuans, 176; 
biformispinus, 175; canadensis, 
99; Enslenii, 185; glandicaulis, 175; 
illecebrosus, 175; jaceus, 176; 
multiformis, 175; neglectus, 
116; odoratus, 175, var. 
malachophyllus, 175, recur- 
vans, 175; recurvicaulis, 176; 
tardatus, 176; vermontanus, 176. 
Rudbeckia laciniata, 205, var. gas- 
pereauensis, 205, var. humilis, 
152 
Rumex Acetosa, 115; maritimus, 
var. fueginus, 62; mexicanus, 
182; persicaroides, 62. 
