Ernestia gen. nov.

nomenclatorial act: 
protologue/first publication
Bibliography: 
Page: 
404
diagnosis: 

Female cones cylindrical, isolated, erect, terminal in position on ultimate branches, with probably spirally disposed, overlapping, fanlike scales, which are deeply trilobate in the upper expanded part and contracted at the base, here bearing one single seed (?). Whether the scales are simple or not cannot be accurately determined.

Male cones ovoid, isolated, erect or more often pendulous, terminal in position on ultimate branches and showing spirally disposed, imbricate, sessile, adpressed, lanceolate sporophylls. Microspores with a broad ring-shaped air chamber (as in Cordaianthus).

Foliage shoots with a pinnate arrangement of the ultimate branches. Leaves on ultimate branches spirally disposed, decurrent, tetragonal in transverse section, hairy, finely dentate at the margins, linear or from a broad base tapering to an acuminate apex, curved, spreading generally at right angles from the shoot, but near the apex strongly curved towards the top of the shoot. Stomata on both sides of the leaf, arranged in longitudinally-running parallel rows of varying length, each row being generally only one stoma broad. Subsidiary cells papillate. Leaves on penultimate branches longer, broader, curved, spreading at right angles from the shoot.

systematic position: 
conifers
typeseries: 
Type series: Zeiller 1892, p. 99, pl. 15, f. 3.; Potonie 1893, pl. 27, f. 12
Classification: 

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith