1843 12 26 The first of these subdivisions..for the most part includes the long-celled species of the genus, such as Zygnema elongatum.
1909 F. S. Collins 96 A small, delicate, long celled form, often found with the type.
2004 96 418/2 Hyphae adnate to the substrate are long-celled and loosely interwoven.