This appears to be a non-standard or erroneous entry; no legitimate definition exists in botanical or general English literature.
Likely a typographical error or repetition combining 'clem' and 'clematis' with an unusual ending. Not found in standard dictionaries or scientific literature.
This word appears to be a mistake in your source list—it doesn't appear in any botanical dictionary or English lexicon, suggesting either a transcription error or a playful test of lexicographical rigor!
Complete word intelligence in one call. Free tier — 50 lookups/day.