56 
ORGANOGRAPHY. 
BOOK I. 
surface of various organs will serve to give some idea of their 
relative abundance. The first twenty-eight cases are taken 
from Thomson’s Treatise on Vegetable Physiology, in the 
Library of Useful Knowledge. For the remainder I am 
answerable : — 
Names of the plants on the leaves of 
Number of stomates on one inch 
square surface. 
1 
which the stomates have been counted. 
Andromeda speciosa . . 
On upper 
side. 
None 
On under 
side. 
32,000 
On both. 
2 
Arum dracontium .... 
8000 
16,320 
24,320 
3 
Alisma Plantago* . . . . 
12,000 
6000 
18,000 
4 
Amaryllis Josephinm . . . 
31,500 
31,500 
63,000 
5 
Cobma scan dens .... 
None 
20,000 
6 
Dianthus Caryophyllus . . 
38,500 
None 
38,500 
77,000 
7 
Daphne Mezereum . . . 
4000 
8 
Epidendrum 
None 
4800 
9 
Hypericum grandiflorum . 
None 
47,800 
10 
Hydrangea quercifolia . . 
None 
160,000 
11 
Gaertnera 
1000 
142,750 
143,750 
12 
Ilex 
None 
63,600 
13 
Iris germanica 
11,572 
None 
11,572 
23,144 
14 
Olea europaea 
57,600 
15 
Paeonia 
None 
13,790 
16 
Pittosporum Tobira . . . 
None 
160,000 
17 
Philadelphus coronarius . . 
None 
20,000 
18 
Pyrus 
None 
24,000 
19 
Sempervivum tectorum . . 
10,710 
6000 
20 
Syringa vulgaris . . . . 
None 
160,000 
21 
Rheum palmatum . . . . 
1000 
40,000 
41,000 
22 
Rudbeckia 
8000 
41,000 
49,000 
23 
Rumex acetosa 
11,088 
20,000 
31,088 
24 
Theophrasta 
None 
172,032 
25 
Tussilago farfara . . . . 
1200 
12,500 
13,700 
26 
Tradescantia 
2000 
2000 
4000 
27 
Vitis vinifera 
None 
13,600 
28 
Viscum album 
200 
200 
400 
29 
Viburnum Tinus . . . . 
None 
90,000 
30 
Primus Laurocerasus . . . 
None 
90,000 
31 
Crinum amabile . . . . 
20,000 
20,000 
40,000 
32 
33 
Stapelia (stem) 
Alstrbmeria 
None 
20,000 
15,000 
34 
Mesembryanthemum . . . 
30,000 
40,000 
70,000 
35 
Aloe 
25,000 
20,000 
45,000 
36 
Yucca 
40,000 
40,000 
80,000 
37 
Cactus speciosissimus (stem) 
15,000 
