1. Underleaves lacking; rhizoids reddish, brown or colorless ... Jungermannia
1. Underleaves present (small, often hidden between the rhizoids); rhizoids colorless ... Nardia see Gymnomitiasceae
1. Anfigastros ausentes; rizoides rojizos, pardos o incoloros ... Jungermannia
1. Anfigastros presentes (pequeños, a menudo escondidas entre los rizoides); rizoides incoloros ... Nardia ver Gymnomitiaceae