Buriadia
rank:
genus
Buriadia
Unranked:
Buriadia
Buriadia Seward and Sahni
nomenclatorial act:
emend.
Bibliography:
Page:
169
diagnosis:
woody vegetative shoots with irregular branching, bearing helically arranged polymorphic, simple, bifid and multifid leaves. Leavesclosely arranged on ultimate and penultimate branches, more distantly spaced on anti penultimate branches and absent from largest stems. Stem surface on apparently decorticated stems rugose with thick cuticle and round to tangentially oriented oval branch scars and longitudinally disposed subtle wavy ridges. Corticated stems with persistent bifid leaves.
systematic position:
Coniferophyta
typeseries:
Buriadia heterophylla Seward and Sahni emend. Singh, Rothwell, Mapes et Chandra
Buriadia Seward & Sahni
nomenclatorial act:
emend.
Bibliography:
Page:
39
diagnosis:
Shoots woody, irregularly branched, branches bearing leaves in lax or crowded spirals. Wood pycnoxylic. Leaves linear or cuneate, only slightly spreading, simple, forked or multifid, trifacial or bifacial, leaves or leaf segments with a median vein mesophyll in transverse plates. Leaf base decurrent. Stomata haplocheilic, monocyclic or partly amphicyclic. Fertile parts of shoots bearing laterally attached solitary stalked ovules. Ovule anatropous, platyspermic. Body of seed oval with two prominent lateral carineae in principal plane and two low ridges in secondary plane.
systematic position:
... may either mean that Buriadia is an unusual conifer or that it is unclassifiable amongst the presently known groups of the gymnosperms.
typeseries:
TYPE SPECIES. Buriadia heterophylla (Feistmantel) Seward & Sahni
Buriadia Seward et Sahni
nomenclatorial act:
emend.
Page:
310
diagnosis:
Holzgewächse. Laterale Sproßsysteme beblättert, spärlich und unregelmäßig verzweigt, mit kräftiger Achse vorletzter Ordnung, wenigen, zerstreut stehenden, nicht-parallelen, ± in einer Ebene aus gebreiteten, abstehenden bis gespreizten Seiten zweigen letzter Ordnung sowohl als auch locker und spiralig gestellten, bifazialen, allseitswendigen, geraden oder adaxial ± stark konvex gekrümmten, her ablaufenden, linealisch - keilförmigen oder keilförmigen, an der Spitze ein - bis mehrmals gegabelten, eine entsprechende Gabeladerung aufweisenden Blättern.
typeseries:
Buriadia heterophylla Seward et Sahni
