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Hubbardiastrobus
Genus Hubbardiastrobus B.A.Atk., G.W. Rothwell, Stockey Int. J. Pl. Sci., 175(2): [2] 000 [257]. 23 Jan 2014
- Name
- Hubbardiastrobus
- Rank
- Genus
- Authors (Pub.)
- Atkinson B. A.
Rothwell G. W.
Stockey R. A.
- Publication
- Hubbardiastrobus cunninghamioides gen. et sp. nov., evidence for a Lower Cretaceous diversification of cunninghamioid Cupressaceae [2014/1]
- Journal
- International Journal of Plant Sciences
- Volume
- 175
- Issue
- 2
- Page number
- [2] 000 [257]
- Year
- 2014
- Parent Taxon
- [Order] Cunninghamiales
- Fossil Status
- strobili (ovulate)
- Type
- Hubbardiastrobus cunninghamioides
- Diagnosis
- Conifer with alternate branching and helically arranged, decurrent needle leaves; leaf tips incurved. Ovulate cones terminal; cylindrical; bract/scale complexes helically arranged. Three ovules/seeds per bract/scale complex;
inverted at maturity; interseminal ridges absent. Ovuliferous scale diverging from bract distal to ovules as three separate tips. Bract/scale trace diverging from cone axis stele as oval bundle; initial divisions horizontal. Ground tissue of stems and cones parenchymatous with scattered sclereids in pith and cortex. Leaves with scattered fibers in mesophyll; hypodermis sclerotic. Resin canals in stem cortex; diverging with leaves as single central resin canal abaxial to leaf trace. Adaxial mesophyll of leaves a uniseriate palisade; abaxial spongy mesophyll of several cell layers. Leaf trace located within horizontally elongated zone of small cells with dark contents.
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