716 SCIENCE. 
3.2 Pteridophytes. 
Subdivided after Engler and Prantl when desired. 
3.3 Bryophytes. 
Subdivided after Engler and Prantl in case of need. 
3.4 Thallophytes. 
Algee, lichens and fungi are best recognized in a 
library arrangement, since no other scheme of classi- 
fying the thallophytes has yet led to the production 
of any considerable amount of literature based on 
such scheme. 
8.41 Algee and Characee. 
8.42 Fungi. 
8.421 Lichens. 
8.422 Fungi in the restricted sense. 
In some libraries this group will require division 
numerically, according to Saccardo’s Sylloge or 
Engler and Prantl. 
3.423 Yeasts and alcoholic fermentation. 
8.424 Bacteria, germ diseases, etc. 
3.425 Mycetozoa. 
4, Vegetable morphology and organography. 
4.1 External morphology, classification and 
description of plant members. 
4.11 Morphology proper. 
4.111 Thallus. 
4.1111 Root. 
4.1112 Shoot. 
4.11121 Stem. 
4.11221 Leaf. 
4.1113 Types of branching. 
4.11131 Inflorescence. 
4.1114 Flower. 
4.11141 Receptacle. 
4.11142 Perianth. 
4.111421 Calyx. 
4.111422 Corolla. 
4.11143 Andreecium. 
4.11144 Gyncecium. 
4.1115 Fruit. 
4.11151 Seed. 
4.1116 Appendages. 
4.11161 Trichomes, prickles, ete. 
4.11162 Sori, sporangia. 
4.11163 Archegonia. 
4.11164 Antheridia. 
4.11165 Embryo sac., ete. 
4.11166 Pollen, pollen plants. 
For this entire subject Anatomy, Physiology, and 
the several groups under Taxonomy, would be con- 
sulted. Subdivisions may easily be made when re- 
quired, 
[N. S. Von. X. No. 255. 
4.12 Embryology. \ 
With frequent reference to development, germina- 
tion, ete. 
4.138 Organography. 
Subdivided like Morphology. , 
4.131 Nomenclature of color as applied 
to plant description. 
General treatises on color would, of course, be 
sought under physics. 
4.2 Vegetable anatomy and histology. 
4.21 Laboratory manuals, technique, mi- 
croscopy, photomicrography. 
Subdivided if necessary. 
4.22 Cytology. 
° 4.221 Cytology. 
4.2211 Protoplasm. 
4.2212 Plastids. 
4.2213 Nucleus. 
4,222 Cell contents. 
4.223 Cell wall. 
4.23 Histology of plant members. 
Subdivided at will, like 4.11. 
4,231 Histological! classification of plants. 
See also Botany of forestry, Botany of pharmacy, 
Taxonomy. 5 
4.3 Teratology. 
Deformities and injuries caused by insects, fungi, 
etc., would be sought under these heads, and under 
Vegetable pathology. 
5. Vegetable physiology. 
5.1 Physiology proper. 
5.11 Vegetative processes. 
5.111 Absorption and conduction of fluid. 
Dew plants, rain plants, carnivorous plants, etc., 
would be sought under Ecology. 
5.112 Transpiration. 
The phenomena of so-called frost plants, etc., also 
conveniently classed here ; the protective function of 
stomata, perhaps, under Ecology. 
5.113 Plant food, nutrition. 
5.11381 Photosynthesis. 
5.1132 Metabolism,. respiration, secre- 
tion. 
5.1133 Nutrition. 
5.114 Growth, protoplasmic activity. 
5.1141 Turgescence. 
5.1142 Growth. 
5.11421 Cireumnutation. 
5.1143 Development. 
5.1144 Cell division. 
Much cytological matter, of necessity, under his- 
tology. 
