submargin

plural submargins

1. biologyAn area parallel to a margin but slightly further in.

   Glumes slightly unequal […] ; florets slightly shorter than the longer glume; lemma ciliate on the margins or submargins in the upper part

   2005, Katy Mallett, Flora of Australia (volume 44, part 2, page 137)

   1 more example

   The ears are brownish, more or less rusty, the extreme edge whitish, particularly on the posterior border, the apical third externally with a submargin of black, expanding towards the tip into a broad blackish subapical spot.

   1894, Joel Asaph Allen, Bulletin of the American Museum of Natural History, page 108