Showing 51 - 75 of 155 results for dateable
Plant Macrofossil (Acer negundo)
fruit 3-5 cm long; wing may be straight or incurved; seed ~1.2 cm long

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

Plant Macrofossil (Silene acualis)
rounded, kidney shaped discs, 0.5-1.5 mm long; ridged margins; lanceolate tubercles (warty bumps) in concentric rows

Plant Macrofossil (Equisetum fluviatile)
~9-25 shallow ridges; central cavity large ~4/5 of total stem diameter; other smaller cavities present in stem

Plant Macrofossil (Equisetum variegatum)
up to 1 cm long; sharply tipped

Plant Macrofossil (Andromeda glaucophlla)
obovate-kidney shaped, 0.7-1.2 mm long

Plant Macrofossil (Chamaedaphne calyculata)
wedge shaped, < 1 mm; striate surface

Plant Macrofossil (Chamaedaphne calyculata)
rounded, 5 sectioned capsule, up to 6 mm wide; indented top; style persistent from top of capsule

Plant Macrofossil (Vaccinium oxycoccos)
adaxial (top) side shown; ovate to narrowly triangular, 2-10 mm long, 1-3 mm wide; bottom of leaf much paler than top; ti...

Plant Macrofossil (Lotus corniculatus)
ovate, 1-1.5 mm long; variable color; prominent hilum (attachment scar)

Plant Macrofossil (Strophostyles helvola)
oblong-compressed; 3-8 mm long; dry, grayish outer coating and black underneath; white, oblong hilum bordered by black

Plant Macrofossil (Luzula acuminata)
subglobose, 1-1.2 mm; clear-yellow elaiosome (lipid rich deposit used to attract insect dispersal) attached to seed

Plant Macrofossil (Lycopus americanus)
abaxial (bottom) side of leaf shown; lanceolate, 3-8 cm long, 1-4 cm wide; margins coarsely, irregularly toothed

Plant Macrofossil (Picea glauca)
linear, 1.5-2 cm long; 4 angled in cross-section; stiff, sharp tipped

Plant Macrofossil (Ostrya virginiana)
obovate 1-3 cm, enclosing seed, slightly inflated; bristly at base

Plant Macrofossil (Ostrya virginiana)
compressed lanceolate-ellipsoid, ~4 x 2.2 x 1 mm; thin, brownish, papery coat lining inside of wall; smooth, unribbed sur...

Plant Macrofossil (Fagus grandifolia)
sharply triangular, 4 sided, 4-10 mm long

Plant Macrofossil (Tilia americana)
globose, 6-10 mm in diameter; pubescent, hard

Plant Macrofossil (Ranunculus hispidus)
flat-lenticular in cross-section, obovate in outline, 2-3.5 mm; prominently beaked and sometimes with marginal wing

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

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CSD Facility

116 Church Street NE, Minneapolis, MN 55455

P: 612-626-7889

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