INTRODUCTION TO BOTANY. ‘37 
Membranous texture, Contextus, Complexus membranaceus. 
A tissue of membranes-united together, either cellular or 
vascular. 
Cellular texture, Compleaus cellulosus, Tela cellulosa, Com- 
plexus utricularis. A membranous tissue composed of cells, 
which do not communicate with each other, and resemble 
soap-suds. Pl. 1. fig. 5. c,d. 
Cells, pores, vesicles, bladders, Cellule, Utriculi. The 
void spaces in the cellular texture. They vary in respect to 
their sides, a, or form, b. 
a. 1. Simple cells, Cellule simplices. The sides trans- 
parent. 
a. 2. Dotted cells, porous cells, Cellule punciate. The 
sides have opake dots, like glands, which are probably 
pores: Pl. 1. fie 5: eh, 4. x 
a. 3. Streaked cells, Cellule lineate. The sides have 
transverse streaks, of a glandular appearance, which are 
probably slits. Pl. 1. fig. 5. g.h. 
. b.1. Regular cells, Cellule regulares, Contextus globu- 
laris, Tela vesicularis: Cells exhibit a hexagonal section in 
every direction; forming the principal mass of the paren- 
chyme. Pl. 1. fig. 5. d. 
b. 2. Tubular cells, Cellule elongate. C. tubulose, Tubi 
parvi, Utriculi fibrosi, Complexus cellulosus lignosus, Tela 
elongata, Tela alveolaria. Long cells, closed at each end; 
forming the wood and ribs of plants. Pl. 1. fig. 5. g. 
b. 3. Necklace cells, Cellule meniliformes, Cellule preca- 
torie, Vasa moniliformia, Vasa precatoria, Vasa vermicularia, 
Vasa intercepta. Oval cells, dotted, separated from one 
another by partitions, resembling the beads of a necklace; 
forming the knots and joints of plants, and their roots. 
They are intermediate between cells and vessels, and may 
be referred to either. | 
Vessels, Vasa, Tuli. Void spaces in the membranous tex- 
ture, open at their extremities: they differ in use, as they 
convey the sap, a. or other fluids, b. c. 
a. Sap vessels, Vasa lymphatica, Lympheductus, Vasa 
pneumatica. ‘These are either: 
a. 1. Dotted vessels, Vasa punctata, Vasa porosa. Pl. 1. 
fig. 5..h. ‘ 
a. 2. Streaked vessels, Vasa lineata, Trachee spurie, 
Vasa fissa, Vasa scalaria, Vasa annularia. hese differ 
from cells only by their length. 
a. 3. Air vessels, Spiral vessels, asa spiralia, Trachea, 
Vasa pneumato-chymifera, Pneumatophora. Tubes com- 
