Emporia lockardii
species
Holotype: OUPH M26.
Paratypes: OUPH M147 and M148
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species
Holotype: OUPH M26.
Paratypes: OUPH M147 and M148
genus
Type species: Emporia lockardii (Mapes & Rothwell, 1984) Mapes & Rothwell, 2003
Ovulate cones, averaging 5·0 cm long x }·5 cm wide, borne as single terminal units on vegetative axes with helically arranged simple or bifid leaves. Cones comprised of primary axis with helically arranged bifid bracts and axillary fertile shoots. Fertile shoots bearing twenty-five to thirty sterile scales and one to two fertile scales (rarely three to five) positioned adjacent to primary axis. One terminal inverted ovule per fertile scale. Ovules bilaterally symmetrical and winged, with rounded or cordate base and attenuated micropyle. Nucellus free from integument distal to chalaza.
Features of species those of genus. Penultimate leaves 8–10 mm long, 1–2 mm wide; ultimate leaves triangular to linear, slightly concave to S-shaped in side view, 2.5–5.0 mm long, 0.5–1.2 mm wide. Epidermal cells elongated to polygonal, often papillate; marginal trichomes present. Stomatal complexes ca. 58x46 µm with 5–9 unipapillate subsidiary cells; guard cells sunken. Wood rays 1–8 cells high. Ovulate cones cylindrical-ellipsoidal, ca. 5 cm long, 1.5 cm wide, with forked bracts and axillary ovuliferous dwarf shoots free to the base.
Features of genus those of family. Endarch stele with uni-biseriate bordered pits on secondary tracheids, and rays 1–2 cells wide, resin rodlets in ground tissues. Leaves amphistomatic; adaxial surface with two long stomatal bands each 4–8 stomatal complexes wide with some shared subsidiary cells, diminishing to single rows or scattered stomata near tip of small leaves; abaxial surface with two shorter basal bands or scattered basal stomata. Stomata monocyclic with unipapillate subsidiary cells.