Huperzia appressa A. Love & D. Love

Huperzia appressa (Desvaux) Á.Löve & D.Löve (Fig. 6D, E) Botaniska Notiser 114: 34 (Löve & Löve 1961). — Huperzia selago subsp. appressa (Bach.Pyl. ex Desv.) D. Löve, Botaniska Notiser 109: 164 (Löve & Freedman 1956). — Huperzia selago var. appressa (Bach. Pyl. ex Desv.) Ching, Acta Botanica Yunnanica 3: 303 (Ching 1981). TYPE MATERIAL. — France • Without location; without date; La Pilaye B. de s.n.; holo-, P [P00263092]. ETYMOLOGY. — The specific epithet refers to the leaves being appressed to the stem. DISTRIBUTION AND HABITAT. — It is distributed from the subarctic to the Himalaya (Zhang & Iwatsuki 2013). GBIF recorded that H. appressa was distributed in Mongolia in 2001, and included photos of the plant specimens (GBIF 2024). However, it was not listed as being present in Mongolia in POWO (POWO 2024), nor does it appear in the most recent list of Mongolia's vascular plants (Baasanmunkh et al. 2022). In 2017, our collection of this species in Uvs province, Mongolia, supported its presence in the region. ADDITIONAL SPECIMENS EXAMINED. — Mongolia • Uvs, Kobdo sum, hilly area; 16.VII.2017; L.Q. Zhao et al. M17-7147; HIMC[HIMC0014772]! • Bayan-Ulgii; 28.VII.2001; Kamelin R.V. et al. s.n.; ALTB[ALTB1010003598] (photo!). TAXONOMIC NOTES Huperzia appressa is morphologically similar to H. selago, which is known to occur in Mongolia. In our Mongolian collections, the plants displayed gemmae distinctly distributed along the entire length of the annual shoot increment (Gilman & Testo 2015). Based on relevant literature (Björk 2020), we have confirmed the identification of these specimens as H. appressa.