counter
counter for branches, clusters, or masses
Rare literary counter used for branches of flowers, clusters of fruit, or masses of clouds. Mostly found in classical or poetic contexts.
古典では「花一朶」のように使われることがある。
In classical texts, it is sometimes used like 'one branch of flowers'.
房 is a common counter for bunches or clusters of fruit, flowers, etc., while 朶 is a rare literary counter with a similar meaning.
The kanji 朶 is of Chinese origin, where it means 'cluster' or 'branch'. The Japanese reading だ is the on'yomi. The exact historical derivation is uncertain.