found: Work cat.: 98-160886: Peppers, R.A. Distribution of boghead algae in Illinois Basin coal beds, 1997:p. 2 (Botryococcus: modern and fossil alga containing starch, placing it among the green algae (Chlorophyceae) but the structure of cell walls and color of the plastids are characteristic of yellow-green algae. Cells produce large amounts of oil)
found: Stewart. Paleobot. & evol. plants:p. 62 (Botryococcus: genus of extant marine & freshwater algal floras, known from Ordovician age onward. Principal constituent of boghead coals and torbanites & may be chief source of hydrocarbons in oil shales)
found: Syn. liv. org.:v. 1, p. 143 (Botryococcus)
