''Elaphoglossum pattersoniae'' is a very rare species of

fern A fern (Polypodiopsida or Polypodiophyta ) is a member of a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers. The polypodiophytes include all living pteridophytes except t ...

that is native to

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...

and

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

. It is very close to '' E. guamannianum'', but is smaller in size, its blade

apex The apex is the highest point of something. The word may also refer to: Arts and media Fictional entities * Apex (comics), a teenaged super villainess in the Marvel Universe * Ape-X, a super-intelligent ape in the Squadron Supreme universe *Apex ...

is acute-obtuse, it lacks dark arachnidoid scales on its abaxial costa and has fewer blade scales.Mickel, John T. "Three new species of Elaphoglossum from Peru." American fern journal 80.3 (1990): 110-112. It is named after Juliet Patterson, a

New York Botanical Garden The New York Botanical Garden (NYBG) is a botanical garden at Bronx Park in the Bronx, New York City. Established in 1891, it is located on a site that contains a landscape with over one million living plants; the Enid A. Haupt Conservatory, ...

collaborator.

Description

Its

rhizome In botany and dendrology, a rhizome (; , ) is a modified subterranean plant stem that sends out roots and shoots from its nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from axillary buds and grow hori ...

is compact and horizontal; its scales linear and a lustrous red-brown in colour, about in size. Phyllopodia are present, with fasciculate fronds which are between long and between broad. Its scales are between . Its veins are at a 55-60° angle, and

hydathode A hydathode is a type of pore, commonly found in angiosperms, that secretes water through pores in the epidermis or leaf margin, typically at the tip of a marginal tooth or serration. Hydathodes occur in the leaves of submerged aquatic plants s ...

s are lacking. Its costal scales are of an orange-tan colour and it lacks intersporangial scales.

References

External links

SpecimensGBIF entryZipcodeZoo entry
Dryopteridaceae Flora of Peru Flora of Bolivia Plants described in 1990 {{Dryopteridaceae-stub