from The Century Dictionary.
- noun The flower or bloom of the shad-bush; also, the plant itself.
Sorry, no etymologies found.
A gust of air perfumed with shad-blossom blew past him, and with this in his nostrils he entered the whitewashed interior and made his way on tiptoe up the bare boards of the aisle.
Under the trees were various low shrubs in flower, -- shad-blossom, with its fleecy stems, and azalia in rosy pink; and the real wild flowers -- the dainty things as wild in growth as in name, were sprinkled everywhere.
The shad make their appearance early in May, at the same time with the blossoms of the pyrus, one of the most conspicuous early flowers, which is for this reason called the shad-blossom.