Marsilea ancylopoda A.Braun

  • Authority

    Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.

  • Family

    Marsileaceae

  • Scientific Name

    Marsilea ancylopoda A.Braun

  • Description

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

  • Discussion

    Zaluzianskia ancylopoda (A. Braun) O. Kuntze, Revis. gen. pl. 2: 823. 1891. Type. Ecuador. Environs of Guayaquil, Jameson 394 (G; isotypes BM, G, K). Marsilea ernestii A. Braun, Monatsber. Kõnigl. Preuss. Akad. Wiss. Berlin 1870: 746. 1871. Zaluzianskia ernestii (A. Braun) O. Kuntze, Revis. Gen. pl. 2: 823. 1891. Type. Venezuela. “Caracas” [Anauco], 1870, Ernst s.n. (NY!). Marsilea berteroi A. Braun, Monatsber. Kõnigl. Preuss. Akad. Wiss. Berlin 1870: 747. 1871. Zaluzianskia berteroi (A. Braun) O. Kuntze, Revis. gen. pi. 2: 823. 1891. Type. [Hispaniola] S. Dominique, 1821, Bertero s.n. 1821 (G). Marsilea mexicana A. Braun, Monatsber, Kõnigl. Preuss. Akad. Wiss. Berlin 1870: 747. 1871. Zaluzianskia mexicana (A. Braun) O. Kuntze, Revis. gen. pl. 2: 823. 1891. Type. Mexico. Julisca [Jalisco], Beechey s.n. (K). 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. Johnson (1986) has combined the local synonyms cited into a widespread species because of the variability of the length of the peduncle relative to the length of the sporocarp (used in the past to separate the local geographic species) and the filling of range gaps by subsequent collections.

  • Distribution

    Dense clay substrates on the borders of temporary ponds and ditches in otherwise arid regions; 0-2400 m. Mexico (Nay); Guat to Pan; Jam, PR; Ven & Col to Braz & Arg.

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