Task: Translation
Input (Japanese): 葉が一切ないために、全てが非常に珍しいと考えられている蘭は、腐った「物質」の中で成長し、葉緑素ももたない。
Output (English): The orchids, all of which are considered very rare because they were found to have no leaves whatsoever on the plant, grow in "matter" that is rotting and also contain no chlorophyll.