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New Species a Eriosorus areniticola (Pteridaceae), from Brazil /ords— Eriosorus myriophyllus, southeastern ferns, I them most Eriosorus Fee a neotropical genus of about 30 species, of is and occurring in cool, moist highlands of the Andes, Central America, Brazil and (Tryon, 1970). As currently defined, the genus appears to be paraphyletic & Jamesonia intimately related to famesonia Hook. Grev., with a polyphyletic nested within Eriosorus. As a result, Eriosorus in need of recircumscription is and revision (Sanchez-Baracaldo, 2004). A was by comprehensive taxonomic revision of Eriosorus presented Alice Tryon the most important paper published on the taxonomy of the (1970), genus. Three additional Bolivian species were recently described by Kessler and Smith (2007). Tryon (1970) reported six species from Brazil: four are endemic and relatively wide-ranging in the mountains of southeastern Brazil, common and one Eriosorus myriophyllus (Sw.) Copel., a very and widely is distributed species which Tryon adopted broad circumscription, possibly for a due few the to relatively collections available that time. at Among specimens myriophyllus by Tryon, some from southern of E. cited by and Such Brazil are distinct the absence of glandular hairs smaller size. specimens were considered "depauperate forms" myriophyllus by Tryon. of E. new However, and have provided and further studies recent collections valuable information on the myriophyllus complex, corroborating the E. new we which recognition of a species, describe herein. TYPE.— Schwartsburd liticola P.B. P.H. Labiak, nov. et sp. BRAZIL. Parana: Jaguariaiva, Parque Estadual do Cerrado, 12 April 1994, Labiak 182 UPCB; A-D. P.H. (holotype: isotypes: SP, UC). Fig. 1, Plantae rupiculae; rhachides nudae suhnudae; stipites et flexuosae, vel laminae eglandulosae membranaceae, vere, subtiles, pilosae, pilis albis, SCHWARTSBURD LABIAk ROM & BRAZIL161 A-D. Eriosorus areniticola (Labiak 182, UPCB): A. Habit. B. Rachis and pinnae. C. Aba Fig. 1 . surface of segment. D. Hairs on adaxial surface of blade. E-G. Eriosorus myriophvi. adaxial surface lamina. (if VOLUME NUMBER AMERICAN FERN JOURNAL: 98 162 3 (2008) 3-5(-7) Eriosoro myriophyllo (Sw.) Copel. sed articulatis, cellularibus. affinis, laminis eglandulosis parvisque differt. Rhizomes creeping, compact, erect at the apices, with ruddy brown hairs and bearing numerous fasciculate leaves and persistent petiole bases bristles, cm cm of old leaves; leaves scrambling, 5-15 long 40 long), monomorphic; (to and petioles usually channeled, rarely cylindrical, atropurpureous at bases mm lamina stramineous distally, less than 1 in diameter, usually half of the lamina with length equaling length), generally glabrous, rarely scattered, (to non-glandular, whitish hairs; blades linear to elongate-triangular, 1-pinnate- cm cm 2-5 wide pinnatifid 2-pinnate 3-pinnate) generally 12 to (rarely (to wide), determinate, membranaceous, hirsute; laminar hairs non-glandular, and whitish, 3-5(-7)-celled, each with an elongate apex, present on veins laminar tissue of adaxial surfaces, and on veins on abaxial surfaces (occasionally on laminar rachises stramineous, nearly glabrous or tissue); with scattered non-glandular, whitish hairs; pinnae at right angles to the rachis or slightly ascending, ovate to triangular-ovate; sporangia borne on veins from pinnae and lamina apices. all Paratypes.—BRAZIL. Sao Paulo: Analandia, 27/IV/2002, V.A.O. Dittrich V.L.O. Er Dittrich 1148 (MBM). Parana: Balsa Nova, 16/VII/1970, G. Hatschbach 24474 (MBM, Kummrow & (MBM, UC- UC-n.v.); idem, 28/V/1986, R. C.B. Poliquesi 2773 n.v.); idem, 21/X/1998, E. Barbosa Cordeiro 171 (MBM); Jaguariaiva, 17/XII/ Er J. & 1991, Cislinski J.M.D. Torezan 34 (UPCB); idem, 10/VII/2005, P.B. /. (MBM, Schwartsburd et al. 880 (UPCB); Lapa, 22/11/2001, f.M. Silva et al. 3317 Kummrow (MBM, UC-n.v.); Palmeira, 10/111/1989, R. et 3131 UC-n.v.); idem, al. (MBM, 20/IV/2000, E. Barbosa et 480 UC-n.v.); Ponta Grossa, Vila Velha, al. III/ 1904, P.K. Dusen 4028 (UC-n.v.); idem, 04/X/1963, G. Hatschbach 10230 (MBM); idem, 10/VI/2004, P.B. Schwartsburd F.B. Matos 240 (UPCB); idem, 14/XII/ Er 2004, P.B. Schwartsburd F.B. Matos 439 (UPCB); idem, Cachoeira Sao 10/ Ef Jorge, Mow DM. X/1992, R.S. et 475 (UPCB); Senges, 14/VII/1982, Vital (SP 196,564). al. — Distribution and Habitat. Endemic southeastern and southern Brazil to (States of Sao Paulo, Parana, Santa Catarina (probably) and Rio Grande do Sul). Plants of this species are epipetric on sandstone rocks, in shady and m moist about habitats, 1,000 in elevation. Etymology.—The specific epithet refers to the habitat preference of this which grows on species, often sandstones Portuguese (in "arenito"). Eriosorus areniticola differs from myriophyllus by the scrambling leaves E. cm 5-15 generally long 40 cm) (to (Fig. 1A), glabrous or glabrescent petioles (without glandular blades hairs), linear to elongate-triangular 1A), 1- (Fig. pinnate-pinnatifid to 3-pinnate, the rachises glabrescent or with a few non- glandular whitish hairs on both sides (Fig. IB), and laminae adaxially densely pubescent with non-glandular whitish hairs, these 3-5(-7)-celled with an apex elongate (Fig. ID). In contrast, E. myriophyllus has erect leaves, which are cm generally 30-40(-95) long (Fig. IE), has petioles pubescent with glandular hairs, blades elongate-triangular to trullate and 2-3-pinnate, rachises densely SCHWARTSBURD & LABIAK: ERIOSORUS ARENITICOLA, A NEW FROM SPECIES BRAZIL163 covered by glandular rusty hairs (Fig. IF), adaxial surfaces of blades sparsely pubescent with glandular and rusty hairs, these 1-3-celled with globose apex a and (Fig. 1G), few non-glandular whitish hairs, these 2-celled and each with an elongate apex. In addition, Eriosorus myriophyllus differs in habitat - - preference terrestrial (sometimes epipetric) in sunny environments and is common very in disturbed areas. Among synonyms the of E. myriophyllus listed by Tryon the "forma" (1970), by [Gymnogramma described Rosenstock myriophylla Sw. eglandulosa var. Rosenst. Hedwigia 'flexuosa Rosenst., 46: 148. 1906) represents Eriosorus f. However, areniticola. the epithet flexuosa cannot be applied rank specific at because of the existence of a prior Eriosorus flexuosus (Kunth) Copel., a widespread Gymnogramma species in the Neotropics. myriophylla eglandu- var. was synonym losa correctly considered a of E. myriophyllus by Tryon (1970). Gymnogramma was synonym felipponei Hert. also considered a of Eriosorus myriophyllus by Tryon The and description provided by (1970). illustration Osten and no Herter (1925) leaves doubt that G. felipponei distinct from is E. areniticola, mainly by the presence of glandular hairs on the rachises and laminar tissue, although G. felipponei has similar small blades. Whether G. felipponei should be best considered a distinct species from myriophyllus E. is uncertain. still We can also exclude Cheilanthes glandulosa Fee (nom. non Swartz, Illeg., 1817), and also Cheilanthes glandulifera Moore and Gymnogramma T. glaziovii C. Chr. (all based on Cheilanthes glandulosa Fee) as possible earlier names our According for species. to the description provided by Fee (1852), cm that species has leaves 54-60 long and the rachises are very hirsute with glandular hairs. We man amun thank Diana Carneiro for preparing the illustrations, ur. k. ior suggesnons correcting the manuscript. Dr. William A. Rodriguesfor correcting the Latin diagnosis. Dr. JeffeiMJn New Prado and MSc. Alejandra Vasco for sharing information upon the types seen the York at MVM, Museu Botanical Garden, the staff of Nacional de Historia Natural (Herbarium Montevideo] g images of the type of Gymnogramma felipponei, and Ana C. Hatschbach Caruon iu The first author also thanks CAPES and CNPq for providing, respectively, Master's Doctoral fellowships. Literature Cited - 1852. Genera Filicum Exposition des genres de la famille des Polypodiacees (Cl 387 lgeres). B. Bailliere. Paris, p. J. New mil A. SMITH. 2007. species and other nomenclatural changes for ferns K. f 59:186-197. Brittonia Plantae Uruguayenses. Pteridophyta. An. Mus. Nac. Montevi G. Hi rter. 1925. I. I 2004. Phylogenetica and biogeography of the Neotropical fern \iix). P. gei V ( and Amer. 91:274-284. Eriosorus (Pteridaceae). Bot. lia J. A 1970. monograph of the Gray Herb. 200:54-174. fe Qtr.