WebIn contrast to fertile organs demonstrating great diversity in bract shape, structure, and sporangiophore number, the stelar architecture of the Sphenophyllales is consistent in … The horsetails and their fossil relatives have long been recognized as distinct from other seedless vascular plants, such as the ferns (Polypodiopsida). Before the advent of modern molecular studies, the relationship of this group to other living and fossil plants was considered problematic. Because of their unclear relationships, the rank botanists assigned to the horsetails varied from order to division. When recognized as a separate division, the literature uses many possible name…
The Phylogeny and Inter-Relationships of the Pteridophyta. A …
WebSphenophyllales - Wikispecies [ dismiss] Translation Wikispecies needs translators to make it more accessible. More info on this page. Sphenophyllales Taxonavigation [ edit] Superregnum: Eukaryota Regnum: Plantae Divisio: Tracheophyta Divisio: Pteridophyta Classis: Equisetopsida Ordo: † Sphenophyllales Familia: Sphenophyllaceae Name [ edit] WebApr 3, 2012 · A new species, Psygmophyllum intermedium, sp. nov., is described based on macromorphological and epidermal and cuticular characters. The main patterns of the intraspecific (intrapopulational and ontogenetic) variability of the P. intermedium leaves are established. A new combination, Psygmophyllum interruptepinnatum (Kutorga) … children\u0027s pediatricians portal
Hamatophyton from the Late Devonian of Anhui Province
WebIn the Sphenophyllales, an extinct order of scrambling sphenophytes, the leaves were wedge-shaped, with a repeatedly forking (dichotomous) venation system … WebMar 1, 2006 · Stelar architecture of the Sphenophyllales is compared with that of basal euphyllophytes and lycophytes. The position of peripheral protoxylem strands in the Sphenophyllales and Iridopteridales... children\u0027s pediatricians \u0026 associates llc