On the other hand, standard, or open pollinated varieties are more or less stabilized in their characteristics. They remain fairly consistent, producing seed that will grow into plants more or less like their parent plants, though less uniform than hybrids.
The rank of admiral (or full admiral, or four-star admiral) is the highest rank normally achievable in the U.S. Navy. It ranks above vice admiral (three-star admiral) and below fleet admiral (five-star admiral). There have been 262 four-star admirals in the history of the U.S. Navy. Of these, 221 achieved that rank while on active duty, 40 were promoted upon retirement in recognition of combat citations, and one was promoted posthumously.
In the United States since 1984, there have been two ranks with the title of rear admiral: rear admiral (lower half) (RDML), a one-star rank; and rear admiral (RADM), a two-star rank. Prior to that, a combination of ranks were used. 1  The stars and shoulder boards of a US Navy two-star, rear admiral. 2  The stars and shoulder boards of a US Coast Guard two-star, rear admiral. 3  The star and shoulder boards of a US Public Health Service two-star, rear admiral.