The pits may be separated by a network of thickenings when the tracheid is reticulate or they may be transversely elongated and separated by bars of thickening like the rungs of a ladder (scalariform thickening).
Cases of complete fusion occur in the formation of laticiferous vessels, and in the spiral, annular and reticulate vessels of the xylem.
Reticulate and Betula nana.
Reticulate), and others, - the star-apple (Chrysophyllum cainito, C. pomiferum), rose-apple (Eugenia jambos), pawpaw, the sapodilla (Sapota achras), the caniste (Sapota Elongata), jagua (Genipa americana), alligator pear (Persea gratissima), the yellow mammee (Mammea americana) and so-called " red mammee " (Lucuma mammosa) and limes.
The "quasi-reticulate" period - walling faced with masonry not yet quite so regular as opus reticulatum, and with brick quoins, coinciding with the second period of decoration (the architectural, partly imitating marble like the first style, but without relief, and by colour only, and partly making use of architectural designs).
No homogeneous series of buildings - we find various styles of construction (quasi-reticulate, opus reticulatum of tufa with stone quoins, of the time of Augustus, opus reticulatum with brick quoins or with mingled stone and brick quoins, a little later); and three styles of wall decoration fall within its limits.
C. Reticulate zoogloea of the same (x 250).