Which is a flowerless, spore-producing plant that is usually a thin, horn - like, or needle - like capsule with spores that develops from a flat, green leaf?
Hornwort
The correct answer is Hornwort.
However, the sporophyte (capsule) in most Riccia species is very rudimentary and short-lived. It typically lacks the distinct, elongated, horn-like shape that is characteristic of hornworts and mentioned specifically in the question. Final Identification of the Plant Comparing the options with the given description, Hornwort is the plant that most accurately fits all the specified characteristics, particularly the presence of a thin, horn-like capsule developing from a flat, green thallus.
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