Pinaceae LINDLEY, 1836
publication ID |
https://doi.org/ 10.2478/if-2018-0008 |
persistent identifier |
https://treatment.plazi.org/id/AF3D2307-2445-FFA0-51A0-FC82FBF3F944 |
treatment provided by |
Diego |
scientific name |
Pinaceae LINDLEY, 1836 |
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Family Pinaceae LINDLEY, 1836 View in CoL View at ENA
Genus Laricioxylon GREGUSS, 1967
1) Laricioxylon nogradense GREGUSS, 1967 Pl. 1, Figs 1, 2
M a t e r i a l. Holotype HNHM-PBO 2008.201 .2. (= 2 slides: tr + rd).
D e s c r i p t i o n. See Greguss (1967: 97, pl. LXXXVI, figs 1–6, legend p. 136).
N o t e s. These re-discovered slides can be considered as the holotype of Laricioxylon nogradense, which is the type species of the fossil genus Laricioxylon (for discussion see Philippe et al. 1999). The tangential longitudinal section, however, is missing. Concerning the affinity to Larix , we did not observe the typical abrupt transition from earlywood to latewood (see in IAWA Committee 2004: feature 42), which is probably obscured by wood deformation (Pl. 1, Fig. 1). Resin canals seem to be traumatic and present in latewood in tangential bands (Pl. 1, Fig. 1, arrows). In the radial section, we observed neither bordered pits in radial tracheid walls nor cross-field pits, but the bordered pits in ray tracheids (Pl. 1, Fig. 2, arrow), which appear to have wide apertures and rounded pit borders (see in IAWA Committee 2004: fig. 45), are rather typical for Larix .
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Botanische Staatssammlung München |
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