What's the difference between succubous and succubus?

Succubous

Definition:

(a.) Having the leaves so placed that the upper part of each one is covered by the base of the next higher leaf, as in hepatic mosses of the genus Plagiochila.

Example Sentences:

Definition:

(n.) A demon or fiend; especially, a lascivious spirit supposed to have sexual intercourse with the men by night; a succuba. Cf. Incubus.
(n.) The nightmare. See Nightmare, 2.

Example Sentences:

(1) Gaskell took Charlotte Brontë, the author of Jane Eyre, the dirtiest, darkest, most depraved fantasy of all time, and, like an angel murdering a succubus, trod on her.
(2) Scarlett Johansson plays the succubus who comes to question the need for all this man-eating.
(3) Yet despite being a malevolent ink-and-paper succubus that will devour your firstborn – seriously, chuck a baby at a copy of the Mail, and watch as the paper roll its eyes back and swallows it whole – the Mail deserves its voice.
(4) Mrs Robinson would be happy to destroy Benjamin, and soon becomes a vengeful maternal succubus, the cold, strict prohibitive mother who punishes for no reason apart from her own pleasure.