Drosera subhirtella is a scrambling tuberous sundew widespread throughout south-west Western Australia. The species is notable for its sulphur yellow flowers, a feature unique to the Drosera of WA. The species has long reddish stems up to 40 cm long that is covered in glands, except for the lowermost sections. Their leaves are orbicular and the sepals are densely covered glands. The petals are yellow in coloration.

I observed this species in the Wheatbelt Region, where it grew in shrubs and outwashes on the large granite outcrops throughout the region. The plants are not self supporting, and lean on shrubs for support. Where there are no shrubs, specimens simply grow along the ground.

The species is distinguished from other yellow-flowered Drosera by its orbicular laminae (D. sulphurea has crescentic leaves), leaning habit (D. zigzagia is self-supporting), glandular sepals (D. moorei has glabrous sepals) and glandular stem (D. intricata is glabrous, save the sepals). Out of bloom, the species largely resembles Drosera macrantha (D. macrantha has white or pink blooms).