submarginate
/ˌsʌbˈmɑːdʒɪneɪt/Botany and Zoology
adjective
Imperfectly or nearly marginated; especially (in later use) (Mycology ) designating a bulb at the base of the stipe of certain fungi which has an indistinct ridge at its upper edge.
Origin
Early 19th century; earliest use found in Curtis's Botanical Magazine. From sub- + marginate, after post-classical Latin submarginatus.