Each leaf blade is glabrous except at the margins, 4.5–8.5 x 0.5–0.9 mm, often pressed against the stem, the ends usually blunt and only rarely tapering to a short, sharp point.

It is similar to the other species of Calectasia and is distinguished from them mainly by the combination of the absence of a rhizome and the glabrousness and lack of a sharp point on the ends of the leaf blades.

[1] This species of tinsel lily is found in scattered populations, sometimes of only a few plants, between Kojonup and Hopetoun in the South West Botanical Province.

[3] It grows in grey clay loam in open woodland or in near-coastal areas, in low heath over laterite.

[1] Calectasia obtusa is classified as "Priority Three" by the Western Australian government department of parks and wildlife[3] meaning that it is poorly known and known from only a few locations but is not under imminent threat.