Spanish heraldry is chiefly remarkable for the manner in which the different bearings are connected in the shield, and for the frequent divisions of it "per saltire"; while Italian heraldry is simpler in its linear forms, though the objects and devices it employs more nearly resemble those of German than of English blazonry. (Jenkins, Robert C., Heraldry: English and Foreign, pVI)
Jenkins describes about marshalling of arms in Spanish heraldry and then explains the simplicity of "linear forms" in Italian heraldry. Hence, is it possible his intent alludes to a genealogical concept? In other words, is it possible his intent from "linear forms" does not refer to the ordinaries, but refers to the simpler forms of "divisions of the field"?
In other words:
- In Spanish heraldry there are a lot of instances with quartering.
- In Italian heraldry but there are a lot of simple coat of arms with no quartering.
- because quartering in heraldry has firm relations with genealogical matters, so, there is a probability that Jenkins wants by use of "linear forms" also refers to the genealogical, and not only the heraldic, aspect of subject. (heraldic aspect of subject refers to the category of charges.)