12-21 leaflet pairs
2-3 mm long, round with pronounced marginal ridge and small beak (at end of ridge on top of seed)
3-5 mm long; short beak (pictured on top of seed); loose, shiny, inflated covering often preserved in lake sediments; in ...
elliptic in outline, lenticular in cross section, body ~5 mm long; abundant marginal spines; woody wall
elliptic, seed coat dull, 2.2-4.5 mm long. Pits 3-4 angles, longer than wide, distributed irregularly across seed coat.
globose, 0.4-0.5 mm in diameter; covered in prickly tubercles (warty bumps) ridges trisecting spore into three parts
earlike shape (with covering removed), 4-5 mm long; very short, blunt beak; indented along margin and face; coiled embryo...
3-5 mm long; short beak (near top of seed); loose, shiny, inflated covering often preserved in lake sediments; in photo c...
Terete, black, 0.3-0.5 mm long. Spiral markings (striae). Two basal impressions present.
fragile, dark stem; foliar scars alternate, formed from basal remains leaves; leaves acuminate (tapering to a point) tran...
ovate-lanceolate, 1.5-2.5 mm long; white hilum (attachment scar) with black border
globose, 0.3-0.5 mm in diameter; ridges trisecting spore into three parts; covered in tubercles (nodules)
flattened-round, 1-1.5 mm long; pitted, narrowly winged near tips
earlike shape (with covering removed; covering is ovate in shape), 4-5 mm long; pronounced beak up to 1 mm long; indented...
earlike shape (with covering removed), 4-5 mm long; pronounced beak up to 1 mm long; coiled embryo
broadly elliptic, 0.4-0.6 mm long; longitudinally ridged; both ends (hilum and chalazal) are conspicuos
arched-oblong, body 2-3 mm long; flattish; stalked at one end, style base persisting on other; spinelike projections alon...
earlike shape (with covering removed), 4-5 mm long; very short, blunt beak; indented along margin and face; coiled embryo...
subfossil fruit; ear-shaped; small size suggests that embryo is immature
leaves in whorls of 6-12; each leaf 8-40 mm long, usually forked in 2-8 segements with spiny teeth along margins; stiff, ...
Elliptic, slender, seed coat shiny, up to 3.2 mm long, 1/3 as thick as long, marked with 30-40 longitudinal rows of obscu...
elliptic, slender, seed coat dull, 1.2-3.8 mm long depending on subspecies. Deeply pitted, 20-60 longitudinal pits.
