The Angel by the name of Sophiel is the Lord of herbs and vegetation, as is mentioned in the greater key of Solomon, specifically in the fourth Pentacle of the Moon. See the description below, as well as the Pentacle depicted.

Sophiel corresponds to Jupiter, specifically the zodiac sign Sagittarius (which obviously makes sense, since Sagittarius deals with the outdoors and knowledge of all things in the outdoors etc., at least in this specific situation). This goes without saying but I’m still going to say it: if one desires to discover herbs, plants and related that possess qualities that will make it so that you’ll discover a cure for a disease or anything of such a grandiose nature, understand that working with Lord Sophiel will require tremendous devotion and commitment in your interactions with him. So no one-off summoning or anything. Even intermediary interactions will not be enough. You want monstrous results, you will have to put in monstrous effort, and even then as is the case by default – there is no literal guarantee. Again, needless to say – still worth the effort by any margin. See below video for the detailed breakdown of everything he brings to the table as I’ve stated, utilizing Astrology (see the description of the video if you want to download the chart for yourself).

And see here for his mentionings in a book that I have reviewed (also see the description in the video review for where to buy the book).

So herbology, gemology– anything relating unto the Earth that can benefit you/mankind is his forte.