The Festucas ar a 'beach grass' as are the marrams, and have infolded leaves that aid in the minimisation of drying-out in their usual harsh, impoverished environment that is dunes on a coast.
Anyway, these I stained with a tri-stain mixed as follows: (this stain formula is not useful for permanent mounts but good for fresh tissue)
Nice colourful images but tragically thick sections, a rush-job before shopping I'm afraid...
The infolded nature of the leaf-blade, the inner trichomes and the thick pink-stained fibers beneath the epidermis are all immediately apparent and tell of this plant's anatomical features to suit it's growing environment I think.
Those inner trichomes help to stabilise the micro-environment (mainly air-movement) above the epidermis, where there are undoubtedly stomata (air-pores) that sadly, in this thick section, are not visible....
Coser-in view of a vascular-bundle with a surrounding sheath of asymmetrically thickened cells, not certain that the thickening is lignin though, it may be suberin and a barrier rather than a strengthening tissue - haven't had time to check.... Nice colours.
I labelled the above-mentioned thickening here as lignin - this may well be wrong though. Interesting to see the stratified deposition of this layer - this isn't often visible in permanent slides - highlighted in mag-box in image.
The grass itself is an unassuming glaucous, thin almost wiry-leaved plant that is often in association with marram grass and helps to preserve the integrity of such sandy dune banks.
Sorry to be so rushed and with meagre information, but I thought some may find the colours and structure interesting.