「Upper, above, stem raised」on「small mound, streaming emission」represents a bean hill, or perhaps a bean on a mound, mons. FRUIT WITHIN A POD such as BEANS, PEAS that grow above the ground with raised vines on small mounds that keep the roots from becoming waterlogged.「Above mound」suggests that beans generally are cultivated atop small mounds of soil, suggested as the proverbial「hill of beans」that may have been「hilling beans」as the original expression. Oft used expressions do tend to morph some and「not worth a bean」(a single bean, that is) appeared as far back as 1297 in historian Robert of Gloucestershire's English Chronicles,. A single actual bean is arguably of little value to anyone for any purpose, but presumably over time, a hill of beans became an exaggeration of the worthlessness of a single bean. Cultivation by hilling beans is often a good practice, but in some locales it is not worth the extra effort, hence「not worth hilling beans」can claim some validity as fact. Nonetheless, no one can deny that a literal hill of beans could supply the daily protein needs of a great many families for quite some time, and in that sense in any day and in any age would have significant value, so the expression as it is generally used today makes about as much sense as 'head over heels' (another morphed expression). This expression originated in the 1300s as heels over head and meant literally being upside down.
Japanese pronunciation refers to an EDIBLE BEAN, and as the euphemism worldwide describing the clitoral protrusion located「in the upper portion of the mons pubis, mons venus」as these elements also depict, which may be a further deprecatory slight against people possessing a clitoris on their own person rather than purchasing and owning them within a herd of interchangeable meat assets, actually a hill of beans perhaps in the eyes of the harem's lord/owner, not worthless as a whole but only when considering a single individual, one bean.
「Rod(s) raised in array above stream of emissions」or「divine prepubescent female with young and small mound streaming emissions」describes the early days of humanity when extended family tribes lived in caves and ANY CLOSE MALE RELATIVE enjoyed incest with any young female—our latter days, too in many cases.
Same elements refer to a group of siblings, an「emitted stream」from a small mound, a string of fruit from a mother's pubic mons veneris, SIBLINGS in a line with the eldest「raised, above」and first in line of a stream down to the last SIBLING, as PEAS IN A POD, or PEAS FROM THE SAME POD (technically, beans and peas are fruits, not vegetables), and to some folks, a clitoris within a vulva resembles a bean within a pod as well. It is no coincidence that the English root word「broth」meaning fluids in which meat has been heated, cooked and fired, is used to describe「someone who broths」as a BROTHER and a「house for brothing」as a brothel…perhaps related to why pea soup is thick and green.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: archaic variant of 菽; archaic variant of 叔
Japanese EDRDG: younger of brothers, father's younger brother, younger brother of a husband
Unihan extended: younger of brothers; father's younger brother younger brother of a husband