The record for most leaves is 56, set on 10 May 2009.
A bill calling for such leaves was introduced this month.
More than half the crew are due for extended leaves.
Though a number of animal species have been found, the site is best known for its fossil leaves.
The farmer had been growing them for their edible young leaves.
Prisoners can also apply for leaves of up to four hours, accompanied by staff members.
Either way, it's grown for its leaves, though there are small pink flowers in late winter.
They are named for their sharp leaves that look like lion's teeth.
It wouldn't be strong enough to hold up a deer, but fine for leaves and twigs.
"I thought about leaving room on the tree for new leaves," Philippe was saying.