(eRe hee 
Ba, Aas 
INDEX 
racea, 353, 354, praemorsa, 350, San- 
cona, 35 
H 
Origanum vulgare, 153 
Nios once umbellatum, 146, 153 
i 134 
ntium aquaticum, 
Orthovarpus pilosus, 246 
ryza 
ce Tongistylis, 147 
Osmunda cin 140, oe Clay- 
toniana, irs ies pedo 40, 141 
OsterHouT, G. E. Notes on “Colorado 
plan ay 
Ostrya virginiana, 143 
Oxalis bie Tae stricta, 147; 154, 
stricta, 147, 154, 157, violacea, 147 
Pachylepis, 
Pachylophus caespitosa, 243, caules- 
cens, 5 = ximius, 571, glabra, 242, 
243, hirs Pde maerawiotiin: 571, 
marginatus, 
Palms, onuueabure of the royal, 349 
Panax quinquefolium, 16, 24, trifolia, 
147 
Panicum anceps, 154, mei Bees oA, 
dichotomum, 148, 150, lati- 
folium, 150, microcarpon, 148, niti- 
dum, 154, obtusum, 88, rostratum, 
; Parkinsonia en lla, 436 
ia 
Parnassia fimbri 
Parsonsia peti ye 154 
Pa ge aad pet ed ah Eon, 230, 
a. rata his " 
pecsahinis metaieina: is 
‘hee racemosa, 
Pecx, C. H. a fone of fungi, 177 
Pecopts ris Zipp 
145 
, perennis, 341, 344, to- 
346, eisodae, 341 
gue, 
Pes iiitem, 375, glaucum, 63, 291, 294, | 
300, 
Penium closterioides, 582, closterioides | 
— natum, 161, Digitus, 161, 
Pennsylvania, cpa daa dia cuit sketch | 
25 
utheaster 
ie <n, 643, alpinus, 
643, cyathophorus, 643, glaber, 
643, or eophilus, 642, 643, pubes- 
ens, 154, riparius, 643, strictus, 642, 
er tiformis, 642 
pubescens, 
nts, 
Periodicity | - cell-division in root of | oo 
Alliu 
677 
_— porque 636, igs 636, 
ericea ciliosa 
Phegopteris hexagonoptera, 15, 
2 alee 145 
m 
wxiwandiie. 574 
Philadelphus, “8 
Phileozera, M8 466, 467, multiflora, 
500, 5097 
Philotria canadensis, 65, 134, 135 
Phleum peg io 4, 156 
gp ae Se 436-443, 
5-4 
ealcarata, 190, 
Phyto- ebuctenige earn a Sethe: 
ern Pennsylvania, 
Payee. Genre ge I ae 57 
Picradenia, 461-508, biennis, 479, 482, 
478, figniaeflora, 469-476, 486, ma- 
crantha, 469-471, 475, 478, 486, multi- 
odorata 
wg 68, echinata, 15, 
glabra, or palustris, 15 
, Piptoporus, 427 
_Pisonia, 611-615, aculeata, 612, calo- 
hylla, 611-613, calophylla rufescens, 
613, coccinea, 612,. discolor, ran a 
613, discolor longifolia, 611, 614, 
floridana, inermis, 612, 614, ob- 
tusata, 611, 2, 614, Pacurero, 612, 
rufescens, 613, suborbiculata, 6 
| Pisonis b and its ies, 6 
obtus: 
Plant formations and ass 
' southeastern Pennsylvania, 133 
i lanceolata, 154, 156, major, 
154, Rugeii, 156, 157, virginica, 154 
| Pla: Notes on Colorado, 357 
Polarity and regeneration in, 
| 
Periodicity — elongation in root of | | Plants from Wyoming, New, 
543 | Plat 
“ht 
eri 
239 
anus, 127, occidentalis, 135, 143 
‘Pi lateilema, 462, Palm eri, 462 
