Showing 76 - 100 of 155 results for dateable
Plant Macrofossil (Fraxinus pennsylvanica)
fruit linear to spatulate, 2.5-7.5 cm long; wing extending ~1/2 the length of body

Plant Macrofossil (Platanus occidentalis)
lanceolate, ~8-9 x 1-1.5 x 1 mm; tuft of stiff hairs pointed upward from base (oriented as top in image); style base pers...

Plant Macrofossil (Ranunculus abortivus)
lenticular in cross-section, elliptic in outline, ~1.5 mm long; beak present, but very short

Plant Macrofossil (Acer saccharinum)
fruit 3-5 cm long; seeds 5-10 mm in diameter

Plant Macrofossil (Acer saccharum)
opposite bud scars, glabrous (shiny); lenticels (white marks)

Plant Macrofossil (Acer negundo)
fruit 3-5 cm long; wing may be straight or incurved; seed ~1.2 cm long

Plant Macrofossil (Atriplex patula)
lens shaped in cross section, circular in outline; 1-3 mm wide; dull, dark brown to black; outline of ring-shaped embryo ...

Plant Macrofossil (Echinochloa muricata)
ovate, 2.5-3.5 mm long; acutely tipped; spikelet 3-4 mm long; awn 3-10 mm long, sometimes up to 25 mm long

Plant Macrofossil (Echinochloa crus-galli)
elliptic-ovate, 2.5-3.5 mm long; awn may or may not be present; awn 2-4 cm long

Plant Macrofossil (Echinochloa crus-galli)
elliptic-ovate, 2.5-3.5 mm long; awn may or may not be present; awn 2-4 cm long

Plant Macrofossil (Echinochloa muricata)
obovate, 2.5-3.5 mm long; spikelet 3-4 mm long; awn 3-10 mm long, sometimes up to 25 mm long

Plant Macrofossil (Viola pedata)
obovate, 1.6-2.0 mm long; prominent elongated white ridge along base of seed (raphe)

Plant Macrofossil (Aster macrophyllus)
oblong-cylindric, 2-3 mm long with tapering base; pappus (white hairs) may or may not be present in fossils; lengthwise r...

Plant Macrofossil (Solidago gigantea)
oblong-cylindric, 1-2 mm long with tapering base; pubescent; pappus (short white bristles) may or may not be present in f...

Plant Macrofossil (Capsella bursa-pastoris)
compressed-elliptic, 0.5-1 mm long; attachment point slightly darker; ridged longitudinally due to bent embryo

Plant Macrofossil (Cerastium arvense)
angular-ovate to kidney shaped, 0.75-1 mm long; covered in many small tubercles (warty bumps) beginning at hilum (base) a...

Plant Macrofossil (Doellingeria umbellata)
oblong-cylindric, 2-3 mm long with tapering base; pappus (white hairs) may or may not be present in fossils; lengthwise r...

Plant Macrofossil (Eupatorium maculatum)
oblong, tapering to base, 2-4 mm long, 5 angled; speckled with small red dots; coarse, white pappus may or may not be pre...

Plant Macrofossil (Viola papilionacea)
obovate-elliptic, 1.8-2.2 mm long; prominent elongated white ridge on one side of seed attachement scar (raphe); mottled ...

Plant Macrofossil (Helianthus grosseratus)
compressed-oblong, 3-4 mm long; dark lengthwise streaks/stripes/mottles; smooth

Plant Macrofossil (Impatiens capensis)
elliptic, four angled, narrowing at base, ~4 x 2.5 x 2 mm; length wise ridges; surface usually warty or wrinkly

Plant Macrofossil (Euphorbia corollata)
obovate, 2-4 mm long; distinct longitudinal line present; mottled brown and white

Plant Macrofossil (Rorippa palustris)
roundish-ovate (unlike others in family), less than 0.5 mm; reticulate dimpled

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