Belongs within: Celmisia.
The subsection Angustatae of the genus Celmisia is a group of New Zealand mountain daisies with leaf laminae of a narrow-lanceolate to linear order. The lamina is linear in series Lineares but stiff and lanceolate to ensiform in series Lanceolatae (Allan 1961).
Characters (from Allan 1961): Herbs arising from hard stocks; leaves in dense tufts, lamina of narrow-lanceolate to linear order. Disk-florets yellow.
<==Celmisia subsect. Angustatae Allan 1961A61
|--C. ser. Lineares Allan 1961A61
| |--C. (subsect. *A. ser. *L.) longifoliaA61 [incl. Aster celmisiaC06, C. perpusilla Col. 1890C06]
| |--C. alpina (Kirk) Cheeseman 1925 [=C. longifolia var. alpina Kirk 1895]A61
| |--C. gracilenta Hooker 1844A61 (see below for synonymy)
| |--C. graminifolia Hooker 1844 [=C. longifolia var. graminifolia Kirk 1899; incl. C. perpusila Colenso 1890]A61
| |--C. insignis Martin 1935 [incl. C. insignis var. dura Simpson & Thomson 1943]A61
| `--C. spedenii Simpson 1945A61
`--C. ser. Lanceolatae Allan 1961A61
|--*C. lanceolata Cockayne 1912A61
|--C. adamsii Kirk 1895A61
| |--C. a. var. adamsiiA61
| `--C. a. var. rugulosa Cheeseman 1906A61
|--C. armstrongii Petrie 1894A61
|--C. lyallii Hooker 1864A61
|--C. major Cheeseman 1925 (see below for synonymy)A61
| |--C. m. var. majorA61
| `--C. m. var. brevis Allan 1961A61
|--C. morganii Cheeseman 1914A61
`--C. petriei Cheeseman 1906A61
Celmisia gracilenta Hooker 1844A61 [=C. longifolia var. gracilentaC06; incl. C. neo-zelandica Gandoger 1918A61, C. setacea Colenso 1889A61]
Celmisia major Cheeseman 1925 [=C. longifolia var. major; incl. C. asteliaefolia Hooker 1844, C. longifolia var. asteliaefolia]A61
*Type species of generic name indicated
References
[A61] Allan, H. H. 1961. Flora of New Zealand vol. 1. Indigenous Tracheophyta: Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledones. R. E. Owen, Government Printer: Wellington (New Zealand).
[C06] Cheeseman, T. F. 1906. Manual of the New Zealand Flora. John Mackay, Government Printer: Wellington.