Brongniart, Histoire des Végétaux Fossiles, 1828-44.
——— Observations sur la Structure intérieure du Sigillaria, etc., in Archives du Museum, i. 405.
——— Exposition Chronologique des Périodes de Végétation, in Ann. des Sc. Nat. 3d series, Bot. xi. 285.
Carruthers, on Gymnospermatous Fruits from the Secondary Rocks of Britain, Journ. Bot., Jan. 1867.
——— on the Structure of the Stems of the Arborescent Lycopodiaceæ of the Coal Measures, Nos. i. to iv., Month. Microsc. Journ., vols. i. ii. iv.
——— on the Cryptogamic Forests of the Coal Period, Paper read before the Royal Institution of Great Britain, 16th April 1869.
——— on the Structure and Affinities of Sigillaria and Allied Genera, Quart. Journ. Geol. Soc., Aug. 1869.
——— on a Fossil Cone from the Coal Measures, Geol. Mag., 1865.
——— on Caulopteris punctata, ibid.
——— on Araucaria Cones from the Secondary Beds of Britain, ibid. 1866.