Pterozonium lineare Lellinger
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Authority
Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
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Family
Pteridaceae
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Scientific Name
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Description
Latin Diagnosis - Rhizoma longe repens, 3—4 mm diam, aliquot dm longum, paleaceum, paleis tenuibus flavo-brunneis, tortis, apicibus setiferis brevibus; frondes simplices usque ad 35 cm longae; stipites ca 1 mm diam, usque ad ca 25 cm longi, quam laminae 1-2-plo longiores, supra sursum usque ad medium valde canaliculati, atropurpurei, basi paleacei; laminae lineares, 10-15 cm longae, 1.5-2 cm latae, 6-8-plo longiores quam latiores, apice rotundatae, basi leviter cordatae, costis acriter carinatis, marginibus integris maturitate incurvatis; venae 0.6-1 mm distantes, non elevatae, hydathodis elongatis flavo-brunneis; sori subconfluentes in fasciis 1-2 mm e costa et margine distantibus; sporangia breviter pedicellata, annulo ex cellulis 16-19 constituto, cellulis stomii dissimilibus; sporae 64 per sporangium, triradiatae, aspectu equatoriali paulo rotundo-triangulares, facie distali plana, faciebus proximis paulo rotundatis in aspectu polari cum gibbis distalibus; paraphyses in receptaculo et interdum in pedicellis insertae, breves laxae, cellulo terminali obovato glanduloso cerifero, cera brunneo-rubra.
Distribution and Ecology - Known only from the type collection. The habitat data are "lowland and slope forests locally frequent on escarpment slopes." Pterozonium lineare has the stipes deeply channeled for at least half their length, while P. brevifrons has stipes that are only shallowly grooved for about one third their length. The laminae of P terrestre, although of about the same shape, are 2-4 times larger and lack the hydathodes of P. lineare.
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Discussion
Cerro de la Neblina, on escarpment slopes east of C a m p 3, alt 1600 m, Amazonas, Venezuela, Maguire, Wurdack d- Bunting 37373 (holotvpe US, isotypes NY, VEN).