The most common and most likely answer to this crossword clue is the 5 letter word CACTI
C
A
C
T
I
More clues leading to the result CACTI
- Features of westerns in cinematographic action
- Scratch twit regularly? These will do
- Prickly types beginning to cavil before start of play
- Ipecac tincture contains desert plants
- Prickly sorts, front of cast at start of play
- Reportedly see earliest part of play “Plants”?
- Animal covering about one lot of plants
- Plants do in Guernsey region
- Plants catnip, oddly, under bottomless container
- 17 Plants in front of Criterion before start of play
Buddy explains!

The straight part
We know that "thorny plants" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case thorny plants = cacti.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does CACTI mean?
CACTI noun- Any member of the family Cactaceae, a family of flowering New World succulent plants suited to a hot, semi-desert climate.
- Any succulent plant with a thick fleshy stem bearing spines but no leaves, such as euphorbs.