Gleichenella pectinata (Willd.) Ching

  • Authority

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

  • Family

    Gleicheniaceae

  • Scientific Name

    Gleichenella pectinata (Willd.) Ching

  • Description

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    Species Description - Rhizomes 3–6 mm diam., with deciduous reddish brown septate hairs 2–3 mm long, surface scabrous when hairs shed; stipes stramineous to light brown, glabrous, dull; frond apices dormant (rarely continuing), pinnae forking unequally, appearing as if each pinna has one flexuous main axis with alternating, unequally branched side branches; forks containing a tuft of reddish brown or castaneous hairs, these hairs simple or usually stellate or branched at the very base, also some forks (within fork) with a pair of small, entire to pinnatifid "stipules," lacking accessory pinnae proximal to the fork; penultimate segments narrowly elliptic; ultimate segments linear, chartaceous to coriaceous, often emarginate at the tip, usually glabrous or glabrescent, often glaucous abaxially, margins revolute at least on fertile segments; sori inframedial between segment margins and midveins; 2n =86 (Chis, Jam, Trin).

  • Discussion

    Mertensia pectinata Willd., Kongl. Vetensk. Acad. Nya Handl. 25: 168, t. 4. 1804. Gleichenia pectinata (Willd.) C. Presl, Reliq. Haenk. 1(1): 71. 1825. Dicranopteris pectinata (Willd.) Underw., Bull. Torrey Bot. Club 34: 260. 1907. Type. Venezuela. [Distrito Federal:] Caracas, Bredemeyer s.n. (B-Willd. 19465!). Gleichenia nitida C. Presl, Reliq. Haenk. 1(1): 70. 1825. Type. Mexico. Haenke s.n. (PRC; frags. NY!, US!).

    Mertensia glaucescens Humb. & Bonpl. ex Willd. var. mexicana Fe´e, Me´m. Foug. 11: 121. 1866. Type. Mexico. Veracruz: “Sabannes de Mirador,” Galeotti 6402 (P!; isotype BR!).

    Gleichenella pectinata differs from Dicranopteris flexuosa by lacking accessory pinnae proximal to the forks (not to be confused with the pair of “stipules” subtending bud, but within the branching of the axes), pinnae forking unequally to produce alternate pairs of pinnules, axes other than stipes with narrow lateral ridges (especially pronounced on axes below ultimate branching), and bilateral spores.

  • Distribution

    Upright or trailing, forming dense patches on open, dry to moist slopes, montane rain forests, cloud forests, pine-oak forests, pine-oak-Liquidambar forests; 100-2150 m. Mexico; Guat, Bel, Hond, Salv, Nic, CR, Pan; Gr & L Ant; Col, Ven, Trin, Guy, Sur, Fr Gui, Ec, Peru, Braz, Bol.

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