186 
Orchids, 2 
Ovary, 86, 87, 89, 95, 96, 97, 119, 
121 
Ovate-acute—egg-shaped in out- 
line, but the free narrow end 
pointed, 61 
Ovate-lanceolate—ovate, but taper- 
ing above, 168 
Pale—Palea, 86, 89 
Palea, 84, 85, 86, 87, 92, 93, 95, 
96, 97, 99—118, 119, 120, 124, 
125, 127, 128, 129, 130, 131, 134, 
7ql35—174 
Pampas-grass, 1 
Panic-grass— Panicum 
Panicle, 5, 12, 87, 88, 90, 91, 103, 
105, 109—118 
Panicum, 4, 19, 67, 69, 72, 87, 90, 
92, 101, 105, 109, 124, 135, 136, 
137, 142; BP. Crus-galli, 137; P. 
glaucum, 30; P. plicatum, 21; P. 
sanguinale, 30; P. verticillatum, 
30 
Papille—protruding cells not long 
enough to be termed hairs, 64, 
67 
Pappus, 125 
Parallel venation, 21, 22 
Parenchyma—ordinary soft cel- 
lular tissue of herbaceous parts, 
64, 65 
Partial inflorescence, 86 
Pasture, 1, 10 
Pasture-grasses, 27, 28, 37 
Perennial Beard-grass—Polypogon 
littoralis 
Perennial grasses, 10, 11, 40, 43, 
58, 114 
Perennial Oat—dvena pratensis 
Perennial Oat-grass—Avena pra- 
tensis 
Perfect flowers, 89, 90, 99, 100, 
105, 106 
Perianth—the floral coverings, 96 
Pericarp—the coats of the true 
fruit, 121, 122 
Petiole, 5, 17 
Phalaris—Canary grass, 88, 101, 
109, 1386; P. arundinacea—Di- 
graphis arundinacea ; P. canari- 
ensis, 31, 139 
INDEX, GLOSSARY, 
Phleum, 66, 88, 89, 90, 91, 93, 102, 
109, 110, 136, 137, 142; P. alpi- 
num, 30, 102; P. arenarium, 7, 10, 
29, 37, 55, 102, 136; P.asperum, 
31, 55, 102, 136; P. Boehmeri, 
8, 31, 55, 102, 136; P. nodosum— 
var. of P. pratense; P. phala- 
roides—P. Bahmeri; P. pratense, 
7,8, 11, 13, 25, 28, 32, S52a0; 
76, 102, 128, 135 
Phloem, 67 
Phragmites 
Phragmites 
Physiognomy, 36, 37 
Piercing of soil, 132 
Pilose—with scattered, rather long 
soft hairs, 59 
Plaited vernation, 21 
Plantago, 3 
Plicate-—plaited 
Plume-like inflorescence, 91, 103 
Plumule, 121,.123, 132, 133 
Poa, 2, 15, 20, 21, 23, 25, 26, 47, 54, 
61, 74, 83, 84, 88, 89, 90, 91, 92, 
103, 104, 109, 110, 118, 114, 115, 
116, 118, 127, 131, 140, 141, 144, 
146, 151, 162; P. alpina, 8, 11, 
13, 14, 16, 17, 31, 44, 54, 63, 
114, 134, 146; P. annua, 8, 10, 
14, 16, 30, 34, 42, 58, 54, 63, 
68, 74, 75, 114, 127, 141, 146; 
P. aquatica—Glyceria aquatica ; 
P. bulbosa, 8, 11, 14, 29, 54, 69, 
111, 114, 146; P. compressa, 8, 
11, 14, 15, 16, 30, 32, 42, 53, 54, 
63, 69, 74, 111, 114, 139, 140; 
P. distans, 29, 30, 114,146; P. 
fertilis—P. serotina, 45; P. 
fluitans—Glyceria fluitans; P. 
laxa, 31, 134; P. loliacea, 31, 
108, 114, 146; P. maritima, 8, 
11, 14, 16, 20, 22,.26, 29, 47, 
54, 111, 114, 146; P. nemoralis, 
7,11, 14, 15, 28, 34, 45, 54, 63, 
74, 75, 113, 114, 139, 140, 141. 
folks 2 opratensie; 7, 11, 13,4045 
16, 17, 27, 32, 33, 41, 42, 44, 
45, 54, 55, 67, 75, 113, 114, 
139, 140, 141; P. procumbens, 
31, EM, 114; P.rigida;, 10ya4, 
30, 111, 114, 146; P. stricta— 
var. of P. alpina, 134; P. trivi- 
communis — Arundo 
