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tasmanian liverworts - lejeuneaceae

lejeunea 191115A

Lejeunea 191115A
1. Lejeunea 191115A

 

This tiny Lejeunea was discovered growing in a population of Drepanolejeunea aucklandica. As the scale shows the branches are less than 0.5mm wide across opposing leaves.

Branching is regular with some secondary branching (pix 1).

Leaf lobules are unusual in being saccate, a feature usually associated with the Lepidolaenacae family (pix 4 & 6). Lobule teeth terminate in one (occasionally two) uniseriate cells tippd with slime papillae (pix 6)
Leaves are orbicular with apex pointed and reflexed adaxially, less than 0.4mm wide (pix 4).
There are 2-5 botryoidal oval oil bodies near leaf base but they appear to get smaller, round and homogenous as they approach the distal parts (pix 7). This may have been an optical illusion.

Some weeks later we discovered another small population of this liverwort, again growing over D. aucklandica on the same substrate - peeling teatree bark. This had maturing antheridia and we were able to observe free swimming spermatoid that emerged from a ruptured antheridium.

perianth
2. branch
perianth
3. perianth
branch leaf
4. branch leaf
underleaf
5. underleaf
lobule tooth
6. lobule tooth
cells
7. cells
androecium
8. androecium
antheridia
9. antheridia

 

Page URL: https://www.bluetier.org/Liverwort3/lejeunea-191115A.htm

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191123-1, 1, 15, 155, 170