Gackstroemia
Epiphytic, rarely terrestrial, dioicous or monoicous (not in Victoria). Stems pinnate to 4-pinnate, without paraphyllia. Lateral leaf lobe ciliate to entire, reniform to ovate; lobule saccate, with or without (not in Victoria) a cilium; stylus entire or ciliate, reduced or absent in branch lateral leaves. Underleaves undivided (not in Victoria) or with 2 non-saccate lobes on main stems, undivided (not in Victoria) or 2–3-lobed on branches, with all lobes saccate or not saccate; underleaf lobes entire, or dentate to ciliate, ciliate or not (not in Victoria) when saccate; leaf cells quadrate, circular, elliptic or oblong, often with large trigones, smooth, rarely papillose (not in Victoria). Androecia of 4–10 bracts, each with one antheridium. Capsule ovoid (not in Victoria) to cylindric, 3–4-stratose; elaters 2-spiral. Spores reticulate to areolate or papillose (not in Victoria) on distal face, finely granulate on proximal face.
Eight species shared between southern South America, Juan Fernandez Island, New Zealand and south-eastern Australia (Grolle 1967; Söderström et al. 2016); one species, G. weindorferi (Herz.) Grolle, in Victoria.
Grolle, R. (1967). Monographie der Lepidolaenaceae. Journal of the Hattori Botanical Laboratory 30: 1–53.
Söderström, L., Hagborg, A., von Konrat, M., Bartholomew-Began, S., Bell, D., Briscoe, L., Brown, E., Cargill, D.C., Costa, D.P., Crandall-Stotler, B.J., Cooper, E.D., Dauphin, G., Engel, J.J., Feldberg, K., Glenny, D., Gradstein, S.R., He, X., Heinrichs, J., Hentschel, J., Ilkiu-Borges, A.L., Katagiri, T., Konstantinova, N.A., Larraín, J., Long, D.G., Nebel, M., Pócs, T., Puche, F., Reiner-Drehwald, E., Renner, M.A.M., Sass-Gyarmati, A., Schäfer-Verwimp, A., Moragues, J.S., Stotler, R.E., Sukkharak, P., Thiers, B.M., Uribe, J., Váňa, J., Villarreal, J.C., Wigginton, M., Zhang, L. & Zhu, R. (2016). World checklist of hornworts and liverworts. Phytokeys 59: 1–828.
Spinning