654 
INDEX 
ganum ; mustard-, Brassica ; 
olive-, Olea ; palm-, Elaeis ; 
pea-nut-, Arachis ; Rantil-, 
Guizotia ; rape-, Brassica ; of 
rosemary, Rosmarinus ; of Sas- 
safras, Sassafras ; of turpentine, 
199. Pinus ; rusa-, Andropogon ; 
verbena -,Lippia ; wood-, Dipter- 
ocarpus 
Oils, 34, 200 
Okra, Hibiscus esculentus L. 
Old man, Artemisia Abrota?ium 
L.; cactus, Cereus 
Old man’s beard, Tillandsia 
Oleander, Nerium 
Oleaster, Elaeagnus 
Oleiferous (Lat.), oil-bearing 
Oleine, Cocos 
Oleraceous, esculent 
Olibanum, Boswellia 
Oligo- (Gr. pref.), few- 
Oligomerous, 82 
Olive, Olea 
Oliver, F. W., Gymnospermae 
Ombrophiles, 143 
Ombrophobes, 143 
Onion, Allium 
Ontogeny, 28 
Oophyte, gametophyte 
Oosphere, ovum 
Open aestivation, 75 ; (vascular 
bundles), with cambium 
Ophio- (Gr. pref.), snake- 
Opium, Papaver 
Opp., opposite, 45, 51 
Oppositifolius (Lat.), with opp. 
leaves 
-opsis (Gr. suff.), -like 
Optimum temperature, 35 
Orache, A triplex 
Orange, Citrus ; Osage-, Maclura 
Orbicular, 52 
Orchis, Orchidaceae ; bee-, Ophrys ; 
bird’s nest-, Neottia ; butterfly-, 
Habenaria ; early purple-, Or- 
chis ; fly-, Ophrys ; frog-, Ha- 
benaria ; lady’s slipper-, Cypri- 
pedium ; man-, Aceras ; musk-, 
Herminium ; scented-, Habena- 
ria ; spider-, Ophrys ; spotted-, 
Orchis 
Ordeal, Erythrophleum ; -bean, 
Physostig?na 
Organs, 19; abortion of, 31; ac- 
cessory, 67 ; analogous, 30 ; 
classification, 31; concrescence, 
70 ; development, 28 ; essential, 
66 ; homologous, 27, 28 ; in- 
ternal structure, 28 ; mode of 
origin, 28 ; multiplication, 70 ; 
orientation, 36 ; position, 28 ; 
reproductive, 32, 54 ; rudimen- 
tary, 31, 68 ; suppression, 31 ; 
symmetry, 31 ; vegetative, 32 
seq.; vestigial, 31, 123 
Orientation of organs, 36 
Ornamental plants, 207, Acer , 
Acalypha 
Ornitho- (Gr. pref.), bird- 
Ornithophily, 99 
Orpine, Sedtim 
Orris-root, Iris 
Orthoplocous, Cruciferae 
Orthostichies, straight ranks 
Orthotrop., orthotropous, 82 
Orthotropic, 36 
Osage-orange, Maclura 
Osier, Salix 
Oswego -tea, Monarda 
Outfit for collecting, 1 1 
Ov., ovule, ovary 
Oval (leaf), 52 
Ovary, 79, 80, 82 
Ovate, 52 
Ovoid, solid oval 
Ovule, 79, 80, 81 (fig.), 55, 
59 
Ovuliferous scale, Coniferae 
Ovum, 55, 81, 104 , Angiospermae, 
Pteridophyta 
Ox-eye daisy, Chrysanthemum 
Ox-lip, Primula 
Oyster-plant, salsify 
P., perianth 
p., page 
Pac., Pacific 
Paddy (rice), Oryza 
Paeony, Paeonia 
Paigle, Cowslip 
Paint-brush, Castilleja ; -root, 
Lachnanthes 
