Ctenitis microchlaena (Fée) Stolze

  • Authority

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

  • Family

    Dryopteridaceae

  • Scientific Name

    Ctenitis microchlaena (Fée) Stolze

  • Description

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    Species Description - Rhizomes suberect to erect, stout, caudices to 4 cm; fronds 70–100 cm long; stipes stramineous to brownish, ca. 1/3 the frond length, to 30(–40) x 5 mm, bases with a dense mat of orangebrown, non-clathrate, hair-like scales 10–20 x 0.5–1 mm; blades green, pinnate-pinnatifid, ovate-lanceolate, 50–70 x 15–20 cm; rachises abaxially with scattered brown, non-clathrate scales mostly 1–2 mm long, also with dense jointed hairs 0.2–0.5 mm; pinnae 22–33 pairs, the proximal ones stalked 1–3 mm, 7–12 (–16) x 1.5–2.5 cm, broadest at the bases, deeply incised to about 1–2 mm from costae; segments entire or faintly toothed near the rounded tips, not or only slightly falcate, margins eciliate; veins simple, 6–10 pairs per segment, ending at the margins above the sinuses; indument on costae abaxially of scattered, tan to reddish, flat to twisted, lanceolate scales, also of short glandular hairs 0.1– 0.2 mm long; lamina between veins glabrescent or with spreading to appressed glandular hairs abaxially, margins ciliate with jointed hairs 0.1–0.3 mm long; sori medial to supramedial, indusiate, the indusia thin, tan, glabrous or minutely hairy.

  • Discussion

    Aspidium microchlaena Fe´e, Me´m. Foug. 8: 102. 1857. Dryopteris microchlaena (Fe´e) C. Chr., Index Filic. 278. 1905. Type. Mexico. [Veracruz:] Orizaba, Schaffner 459 (not found at P; isotype K!).

    Aspidium microcarpon Fe´e, Me´m. Foug. 8: 105. 1857, hom. illeg., non Blume, 1828. Type. Mexico. [Veracruz:] pre`s de Cordoba, Schaffner 214 (not located).

    Aspidium karstenii A. Braun, Ind. Sem. Hort. Berol. App. 3. 1867. Dryopteris karstenii (A. Braun) C. Chr., Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd., ser. 7, 10: 98. 1913. Type. Cultivated Hort. berol. from spores of plant collected in Venezuela. Karsten s.n. (B, frag. BM; isotype K).

    This is most similar to C. submarginalis, differing from that in the rather large, persistent indusia and the non-apiculate segments that are rounded at the tips. A collection from the Eastern Highlands of Chiapas (Breedlove 33084, DS), Mpio. Ocosingo, 800 m, appears intermediate between this species and possibly C. interjecta or C. equestris. It has large indusia, bipinnate fronds at the blade bases, and pinnules adnate nearly their width (or more) with crenate to dentate margins. The sporangia appear to be abortive, and it seems likely that the specimen represents a hybrid in the C. submarginalissloanei group, between a pinnate-pinnatifid species and a more dissected species.

  • Distribution

    Terrestrial in montane rain forests; 1000–1500 m. Mexico; Hond, Nic (Rojas, 2001), CR; Col, Ven, Peru.

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