司金龍 "Tsukasa kinryu"

金龍という種類がある。葉が紐のような所謂一本葉だ。しかし，時々葉の先が幾つかにわかれて手のような形になることもある。ほとんどが手葉となるよう育成した品種が司金龍と呼ばれている。「司」は役人の職位とか役割とかいう意味と辞書にはあるが，この場合どういう意味で使われているのかは謎だ。

There is a species named "Kinryu" meaning a golden dragon.  Leaves of Kinryu are like strings so called "one string leaf".  But, sometimes there appear leaves of which ends are split into several branched and are like fingers of hands.  The species that are cultivated to have almost all leaves be "hand leaves" is called "Tsukasa kinryu".  According to a dictionary, "tsukasa" means a rank of public servant or role of a person, etc.  It is still a question in what sense "tsukasa" is used in this case.