222 
phibium, forma terrestre, 39; cili- 
node, 165, 166, var. laevigatum, 
166, The West Virginian Variety of, 
165; Convolvulus, 13; exsertum, 
189; Fowleri, 187, 188; from 
Nova Scotia, A new maritime, 187; 
glaucum, 187; hydropiperoides, 
128, forma leucochranthum, 
129; maritimum, 187; Persicaria, 
128, forma albiflora, 128, 129; 
Raii, 187, 188. 
Polysiphonia fastigiata, 4. 
Pond Lily, Yellow, 137, 139. 
Pontederia, 18, 19.. 
Poplar, Black, 206; Carolina, 207, 
209; Lombardy, 206. 
Populus, 106; alba, 106, 201, 202, 
alba Bolleana, 202; angulata, 207— 
209; aurea, 206; balsamifera, 13, 
106; candicans, 106; canescens, 
201, 202; deltoide, 207; deltoides, 
106, 207- 209; dilatata, 201, 206; 
randidentata, 15, 106, 201-203, 
orma coelestina, 204, 205, forma 
meridionalis, 203-205, forma 
septentrionalis, 203, 205; hete- 
rophylla, 201, 205; italica, 206; 
monilifera, 206; nigra, 207, 208, 
var. italica, 106; tremula, 203, 
205; tremuloides, 16, 106, 201, 
205, 206, ? Davisiana, 206, forma 
reniformis, 206; trepida, 203; 
virginiana, 206—208. 
Potamogeton, 17; amplifolius, 17; 
bupleuroides, 17; dimorphus, 17; 
epihydrus, 17. 
Potentilla, 5, 6, 8; angustifolia, 10; 
Anserina, 40, var. sericea, 
Comarum, 10; digitata, 10; flori 
bunda, 90; fruticosa, 90; mon- 
speliensis, var. norvegica, 40; nivea, 
132; palustris, 5, 6, 9-11; The 
American Variations of, 5, var. 
parvifolia, 10, 11, forma sub- 
sericea, 9, 10, var. subsericea, 10, 
var. villosa, 5, 6, 8-11; recta, 185; 
retusa, 195; rubra, 10; tridentata, 
194, 195, A Form of, 194, forma 
hirsutifolia, 195. 
Preissia, 63. 
Prenanthes racemosa, 41. 
Prickly Pear, 101, 104. 
Prunus cuneata, 90; depressa, 90; 
maritima, 91, 92, forma flava, 92; 
pumila, 12; virginiana, 13, 16. 
Psedera vitacea, 13. 
Pseudotsuga mucronata, 95. 
Pubescent Variety of the 
Raspberry, 151. 
dwarf 
Rhodora 
[DECEMBER. 
Pycnanthemum aristatum, 89; muti- 
cum, 89. 
Pylaiella littoralis, 4. 
Pyrola asarifolia, 15. 
Quercus, 43, 79, 112; alba, 41, 112, 
142; alba X bicolor, 113; alba X 
Prinus, 113; bicolor, 112; coccinea, 
112; Garryana, 142; ilicifolia, 112; 
ilicifolia X velutina, 113; imbri- 
caria, 112; macrocarpa, 141; palus- 
tris, 112, 141, 144; prinoides, 112; 
Prinus, 41, 112, 141, Plurality of 
Seeds in Acorns ‘of, 41; Robur, 42, 
112, 141; rubra, 15, 16, 112, 141, 
142, var. ambigua, 190; velutina, 
112. 
Quinquefolium palustre rubrum, 6. 
Ranunculus arvensis, 161; Cymba- 
laria, 160-162, 187, var. alpinus, 
162, forma hebecaulis, 162, var. 
major, 161, 162, var. saximon- 
tanus, 162, The Variations of, 
160; Flammula, 89, 161, var. 
reptans, 12; laxicaulis, 89, 191; 
repens, 17; septentrionalis, 17; 
tridentatus, 161, var. major, 161, 
162, var. minor, 160, 161. 
Raspberry, Dwarf, 151, A pubescent 
Variety of the Dwarf, 151. 
Reboulia, 63. 
Red Oak, 142, 143. 
Rediscovery of an historie Collection 
of Massachusetts Plants, 185. 
Reports on the Flora of the Boston 
District,— XIX, 106. 
Rhode Island Coast, Kjellmannia 
sorifera found on the, 152. 
Rhodochorton Rothii, 4. 
Rhododendron maximum, 163. 
Rhodymenia, 4; palmata, 3. 
Rhus Toxicodendron, 14. 
Riccardia multifida, 76; palmata, 76. 
River Maple, 13. 
Rosa spinosissima, 40. 
Rubus, 28; Chamaemorus, 184; pu- 
bescens, 151, var. pilosifolius, 
152, 191; triflorus, 151. 
Rumex mexicanus, 39, 96. 
Ruppia, 119, 124, 125; brachypus, 
120, 121, 124; curvicarpa, 124; 
drepanensis, 120; in North Amer- 
ica, The Genus, 119; intermedia, 
124, var. eurvicarpa, 127; mari- 
tima, 119-125, 127, subsp. brachy- 
pus, 124, var. brachypus, 124, 
subsp. brevirostris, 124, var. brevi- 
rostris, 123, 124, 127, var. curvi- 
