All referenced *Lepidosperma* species once and–or still occurring in the SE. Melb. Sand-stone-belt ecological region.
Listing all of the referenced Lepidosperma species once and–or still occurring in this region – with source ref's::
• Lepidosperma curtisiae K.L.Wilson & D.I.Morris – was named L lineare R.Br. in Sutton (1912) and derived Willis (1989)
• Lepidosperma filiforme Labill. – Sutton (1912) and derived Willis (1989)
• Lepidosperma gladiatum Labill. – Sutton (1911) and derived Willis (1989)
• Lepidosperma laterale R.Br. – var. angustum Benth. seems was included in the early 1900s description of then named L. lineare R.Br. in Sutton (1912)
• Lepidosperma laeve R.Br. – was locally known as Lepidosperma congestum R.Br.
• Lepidosperma longitudinale Labill. – Sutton (1911, 1912 as L. exaltatum R.Br.) and derived Willis (1989)
• Lepidosperma semiteres F.Muell. ex Boeckeler – in the early 1900s seems was included within the description of L. filiforme Labill. included in Sutton (1912) and occurs locally in Bayside, thus in Willis (1989)
• Lepidosperma sieberi Kunth – formerly locally called L. concavum R.Br. now known as restricted to central NSW, in Sutton (1912) and derived Willis (1989)
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I hope that information eventually helps clarify, once you absorb it all.
https://inaturalist.ala.org.au/comments/d8e629e6-6c0f-40af-b17d-fe7a10c7e4b2
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