Belongs within: Tracheophyta.Contains: Archaeopteridales, Lagenostomales, Apo-Spermatophyta. The Lignophyta comprises the clade of wood-producing plants, defined by Cantino et al. (2007) as the most inclusive clade characterised by a bifascial vascular cambium (a meristematic layer producing secondary xylem on the inner face and secondary phloem on the outer face) homologous with that of Pinus sylvestris. Synapomorphies… Continue reading Lignophyta

Categorised as Lignophyta


Belongs within: Embryophyta.Contains: Rhyniaceae, Tracheophyta. The Apo-Tracheophyta are a broad clade of land plants, defined by Cantino et al. (2007) as the most inclusive clade possessing tracheids (differentially thickened water conducting cells) homologous with those of Pinus sylvestris. <==Apo-Tracheophyta [Psilophyta, Pteridophyta, Rhyniophyta, Rhyniophytina, Rhyniopsida, Tracheidatae] |–Lyonophyton Remy & Remy 1980SP12 [incl. Aglaophyton Edwards 1986D98, SP12]… Continue reading Apo-Tracheophyta


Belongs within: Apo-Tracheophyta.Contains: Pan-Monilophyta, Trimerophytina, Lignophyta, Zosterophyllaceae, Lycopodiopsida. Tracheophyta was defined by Cantino et al. (2007) as the crown-group of vascular plants, i.e. the largest crown clade including Zea mays but not Phaeoceros laevis, Marchantia polymorpha or Polytrichum commune, characterised by the walls of the water-conducting cells having a thick, lignified, decay-resistent layer. Modern tracheophytes… Continue reading Tracheophyta


Belongs within: Leptosporangiatae. Matoniaceae: ferns with a heritage Published 13 January 2019 Ferns are one of those groups of organisms, like sharks and cockroaches, that are not really as ancient as most people imagine. For all that ferns are indelibly associated in the public conscience with antediluvian imagery of steamy coal swamps and great lumbering… Continue reading Matoniaceae


Belongs within: Tracheophyta. The Trimerophytina are a group of vascular plants known from the Early (Pragian) to the lowermost Middle Devonian. They bore sporangia in pairs that are commonly preserved twisted around each other (Gerrienne 1997). Before the word for world was forest Published 10 July 2009 …though to be perfectly honest, I’ve never read… Continue reading Trimerophytina


Belongs within: Lignophyta. The Urbaum Published 18 February 2015 It appears that it’s been over a month now since I last posted anything at this site. I’m not going to go back and check, but I think this may be the longest hiatus that Catalogue of Organisms has been through since I first launched it… Continue reading Archaeopteridales


Belongs within: Monilophyta.Contains: Equisetum. The Equisetopsida includes the modern horsetails, Equisetum, and their fossil relatives. Members of this group have whorled leaves, and most have a eustele stem structure with a hollow pith surrounded by vascular bundles (Doyle 1998). Equisetopsida [Equisetophyta, Sphenophyta, Sphenophytae, Sphenopsida] | i. s.: Equisetires keuperianaW70 |–Pseudobornia [Pseudoborniaceae, Pseudoborniales]C93 | `–P. ursina… Continue reading Equisetopsida


Belongs within: Leptosporangiatae. The Lomariopsidaceae is a family of tropical hemiepiphytic ferns. It’s not what you think Published 22 July 2009 A little less than a year ago, I mentioned the strange and extremely cool phenomenon of independent gametophytes in ferns—cases where the tiny haploid gametophyte generation of a fern is able to reproduce asexually… Continue reading Lomariopsidaceae


Belongs within: Polypodiales. The Thelypteridaceae are a mostly tropical family of ferns, whose distinguishing features include an indument of transparent needle-like hairs and an absence of blade scales (A. R. Smith). Characters (from A. R. Smith): Plants terrestrial or on rock (occasionally epiphytic). Stems creeping to erect, scaly at apex. Leaves monomorphic or somewhat dimorphic… Continue reading Thelypteridaceae


Belongs within: Leptosporangiatae.Contains: Aspidiaceae, Lindsaeaceae, Hypolepis, Parkeriaceae, Pteridaceae, Cystopteridaceae, Asplenium, Hymenasplenium, Thelypteridaceae, Woodsia, Blechnaceae, Athyrium, Diplazium, Bolbitidaceae, Dryopteridaceae, Nephrolepis, Davalliaceae, Grammitidaceae, Polypodium, Pleopeltis, Pyrrosia, Nephrodium. The Dennstaedtiaceae is a cosmopolitan family of mostly terrestrial ferns. Though primarily tropical, species of Pteridium (bracken) are found in almost all habitats and P. aquilinum is perhaps the world’s… Continue reading Polypodiales