I think this is a job for the experts. I hope your collecting permits come through soon. The bifurrowed leaves with prominent midrib below, and pale flowers, suggest S. graminifolium, but the leaf width and the fact that they do not appear to be glaucous (with a waxy bloom), suggest S. armeria. The authors of the original paper give a lot of detail about S. armeria which does not appear n the description of S. graminifolium.
Thanks Betty, the variability I have seen in this group of the Stylidiums around the ACT has often left me wondering what I have. Neither the PlantNET key or the one of Best et al. in Muelleria 27(2): 174-178 (2009) really seem to work for all the variability in the plants we have here, I haven't seen the papers of Jackson & Wiltshire 2001 and Raulings & Ladiges 2001 in Australian Systematic Botany so I don't know if they have anything else to offer
Unfortunately I didn't have a permit at this stage, so it is possible that that population remains uncollected. I suspect the traditional plodding botanical descriptive approaches alone may not provide the answers ecologists and naturalists are after for a quick reliable identification in this group of Stylidium. At the moment it seems that much uncertainty exists in understanding characters or groups of characters truly useful for recognizing and separating species. The application of molecular tools may first be necessary to recognize valid species or subspecies entities. Multivariate statistical techniques could then be tried to identify which combination of physical characters can be best to use to distinguish and recognize the molecular defined entities. It has been more than 30 yrs since I've used such statistics and I've never had any experience with modern molecular biology, so all this is well beyond me now.
Indeed for the necessarily multiple methods of resolution of the taxonomy of the broadest sense of Stylidium graminifolium – i agree, including with my own views and as i am used to for decades, Juliet Wege's views i have quoted and now your expressed above views !
Does this match or have similarity ? : https://photos.natureshare.org.au/user_generated_content/original/observations/photos/original/53b3985ce35eb129840111df.jpg ( https://inaturalist-open-data.s3.amazonaws.com/photos/75734875/original.jpeg ) . .
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