oblong, tapering to base, 3.5-4.5 mm long, indistinctly 5 sided; speckled with small brown-red dots; white base; coarse, ...
oval to spatulate, 1-1.2 cm long; visible attachement point; surface pitted-reticulate;
elliptic compressed-triangular, 2-2.5 mm long; surface marbled with streaks and/or netted lines
2-3 cm halbard shaped with basal lobes; coarsely toothed, especially so along one side of center lobe
compressed elliptic, biconvex, less than 0.5 mm long; glossy
fruit flat, lanceolate to oblanceolate, ~2.5-4 cm x 6-10 mm; very small notch at tip of wing
compressed ovoid to ellipsoid, ~7 x 5 x 3 mm; several grooves/stripes on each face
angular-ovate, flat; ~0.5 mm long; surface with distinct tubercles (wart like projections); must compare to other tubercl...
wedge shaped, like narrow sector of sphere, 1-2 mm long; one side nearly straight
nut 10-16 mm long, 9-15 mm wide; cup shallow, saucer shaped, covering 1/5 to 1/4 of nut
buds glabrous
opposite bud scars, glabrous (shiny); lenticels (white marks)
lens shaped in cross section, circular in outline; 1-3 mm wide; dull, dark brown to black; outline of ring-shaped embryo ...
obovate, 2.5-3.5 mm long; spikelet 3-4 mm long; awn 3-10 mm long, sometimes up to 25 mm long
obovate, 1.6-2.0 mm long; prominent elongated white ridge along base of seed (raphe)
1-2.5 cm wide; 5-12 shallow, rough ridges; hollow central cavity 1/3-1/4 of total stem diameter; other smaller cavities ...
linear to narrowly oval, 2-5 cm long, 3-10 mm wide; sharp pointed with a small spine; leathery; margins may be rolled und...
compressed kidney shaped, 2-3 mm long; narrow line runs obliquely on each face from hilum (seed attachment scar)
oblong-cylindric, 2-3 mm long with tapering base; pappus (white hairs) may or may not be present in fossils; lengthwise r...
oblong-cylindric, 1-2 mm long with tapering base; pubescent; pappus (short white bristles) may or may not be present in f...
obovate to compressed triangular, 1-2 mm long; white mouth at seed attachment base; globules on inner face; globules and ...
compressed-elliptic, 0.5-1 mm long; attachment point slightly darker; ridged longitudinally due to bent embryo
biconvex, 2-3 mm long; wing 5-8 mm long
biconvex, 1.5-2 mm long; wing 2-5 mm long
angular-ovate to kidney shaped, 0.75-1 mm long; covered in many small tubercles (warty bumps) beginning at hilum (base) a...
