, on rock, or often epiphytic, erect
, or occasionally pendent. Stems long- to short-creeping, branched or not, bearing scales
and few to numerous
, usually dictyostelic. Leaves monomorphic
in bud. Petiole
, as in Loxogramme ], lacking scales or sometimes scaly
, with usually 3 vascular bundles
. Blade simple
to often pinnatifid
, or pinnate, infrequently more divided
; rachis grooved
or not adaxially. Veins free
(and simple to several times forked
) to often anastomosing in complex
, areoles with or without included
. Indument on blade
absent, or petiole, rachis, costae, and sometimes blade tissue usually bearing hairs
(these often septate
and with reddish crosswalls) and/or scales. Sori borne abaxially on veins, round
, occasionally elongate
, rarely marginal
, rarely covering surface; paraphyses present or absent; sporangia with stalk
of 2 or 3 rows
; indusia absent. Spores usually transparent or yellowish (rarely greenish), all 1 kind, bilateral
, monolete [rarely trilete, as in some Loxogramme], surface most often smooth
, or granulate
, occasionally spiny
, 64 per sporangium (spores globose
and 32 per sporangium in apogamous spp.
) . Gametophytes green, aboveground, cordate or elliptic
or sometimes glandular
; archegonia and antheridia borne on lower surface, antheridia 3-celled.
Genera ca. 40, species perhaps 500 (7 genera, 25 species in the flora ) : worldwide, especially tropics and subtropics.
Genera in this family are variously circumscribed, and the New World species historically were placed in the single genus Polypodium . Many of the segregates recognized here are still placed in Polypodium in recent floristic accounts. Limits of genera in both Old World and New World are controversial and are currently under study by several workers.
- Chatton, 1925
- Haeckel, 1866
- Cavalier-Smith, 1981
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Kenrick & Crane, 1997, nom. inval.
- Kenrick & Crane, 1997, Nom. Nud.
- Class: Polypodiopsida () - Cronquist et al., 1966
- Infraphylum: Moniliformopses () - Kenrick & Crane, 1997, Nom. Nud.
- Subphylum: Euphyllophytina () - Kenrick & Crane, 1997, nom. inval.
- Phylum: Pteridophyta () - Sinnott, 1935 ex Cavalier-Smith, 1998
- Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
- Kingdom: Plantae () - Haeckel, 1866 - Plants
Members of the genus Platycerium
ZipcodeZoo has pages for 12 species, subspecies, varieties, forms, and cultivars in this genus:
P. bifurcatum (Antelope Ears) · P. bifurcatum var. bifurcatum (Common Staghorn Fern) · P. bifurcatum var. Panama (Staghorn Fern) · P. coronarium (Stag's Horn Fern) · P. hillii (Green Staghorn) · P. hillii 'Horn Surprise' (Green Staghorn) · P. holttumii (Holttums Staghorn) · P. ridleyi (Ridleys Staghorn) · P. superbum (Staghorn Fern) · P. veitchii (Silver Elkhorn Fern) · P. wandae (Queen Elkhorn Fern) · P. willinckii (Java Staghorn)
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- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 13, 2012.