The scientific names of genera, subgenera, species, and subspecies (varieties) are italicized, but are set in roman in italic matter; the names of groups of higher rank than genera (phyla, classes, orders, families, tribes, etc.) are printed in roman.
- A.s. perpallidus
- Dorothid 1 . sp. (roman "?")
- Tsuga canadensis
- Cypripedium parviflorum var. pubescens
- the genera Quercus and Liriodendron
- the family Leguminosae; the family Nessiteras rhomhopteryx
- Measurements of specimens of Cyanoderma erythroptera neocara
Quotation marks should be used in place of italic for scientific names appearing in lines set in caps, caps and small caps, or boldface, even if there is italic type available in the series.
The words Resolved, Resolved further, Provided, Provided, however, Provided further, And provided further, and ordered, in bills, acts, resolutions, and formal contracts and agreements are italicized; also the words To be continued, Continued on p. , Continued from p. , and See and see also (in indexes and tables of contents only).
- Resolved, That (resolution)
- Resolved by the Senate and House of Representatives of the United States of America in Congress assembled, That
- [To be continued] (centered; no period)
- [Continued from p. 3] (centered; no period)
- see also Mechanical data (index entry)
All letters (caps, small caps, lowercase, superiors, and inferiors) used as symbols are italicized. In italic matter roman letters are used. Chemical symbols (even in italic matter) and certain other standardized symbols are set in roman.
- nth degree; x dollars
- D÷O.025Vm2.7=0.042/G-1Vm2.7
- 5Cu₂S.2(Cu,Fe,Zn)S.2Sb₂S₃O₄
