Marsilea ancylopoda A.Braun

  • Authority

    Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.

  • Family

    Marsileaceae

  • Scientific Name

    Marsilea ancylopoda A.Braun

  • Description

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    Species Description - Differs from Marsilea mollis by: rhizomes with short nodal shoots, dark red to black, apices with rusty hairs, glabrate beneath; land fronds with glabrous stipes, leaflets covered with non overlapping hairs or glabrous; abaxial intercostal striae irregularly distributed or absent; sporocarps solitary, on spreading or retrorse peduncles often hooked near the apices, rectangular to round in lateral view, lateral ribs none, covered with shaggy pelt of white to fulvous hairs, sometimes glabrate, (2.5–)4–6 x (2–)2.5–5 mm, 2.1–3.2 mm thick, superior tooth a broad bump 0.1 mm high.

  • Discussion

    Zaluzianskia ancylopoda (A. Braun) Kuntze, Revis. Gen. Pl. 2: 823. 1891. Type. Ecuador. Environs of Guayaquil, Jameson 394 (G; isotypes BM!, G, K!). Marsilea mexicana A. Braun, Monatsber. Ko¨nigl. Preuss. Akad. Wiss. Berlin 1870: 747. 1871. Zaluzianskia mexicana (A. Braun) Kuntze, Revis. Gen. Pl. 2: 823. 1891. Type. Mexico. Julisca [Jalisco:] Beechey s.n. (K!).

    Unverified, Doubtful, or Mistaken Reports. Chih (Spellenberg 9557, MEXU, NMC, NY, cited by Spellenberg et al., 1996; the specimen is vegetative, and possibly M. vestita, as annotated by Yatskievych in 1996). Qro (Rzedowski 48832, 48589, both IEB, cited by Pe´rez- Garci´a et al., 1999, but not verified). Tab (reported by Magan˜a, 1992, but not verified and possibly based on a misidentification). Marsilea ancylopoda produces sporocarps throughout the year, perennating solely by sporocarps. The distinctive recurved peduncle with the sporocarps developing and maturing underground is unique among New World marsileas. The broad virtually glabrous leaflets and pelt of appressed reddish hairs on the sporocarps are also characteristic.

  • Distribution

    Dense clay substrates on the borders of temporary ponds and ditches in otherwise arid regions; 0–2400 m. Mexico; Guat, Hond, Nic, CR, Pan; Jam, Hisp, PR; Col, Ven, Ec, Peru, Braz, Bol, Parag, Arg, Uru.

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