Without a stem or having no visible stem; a variant form of acauline or acaulescent.
From Latin 'a-' (without) + 'caulis' (stem) + '-ose' (adjectival suffix meaning 'full of' or 'having'). The '-ose' suffix is common in botanical terminology but less frequent than '-ous' or '-ine.'
'Acaulose' is the rarest of the three 'no stem' words—you'll almost never see it outside of 19th-century botanical textbooks, which makes it a perfect example of how scientific language develops multiple competing terms that eventually go extinct.
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