Monoecious. Flowers usually closely packed in groups and clusters, often aligned in fissures of bark, (2.0–) 2.8–3.9 mm long, (1.8–) 2.8–3.8 mm diam. (1.8–2.5 mm diam. cited in Table 1 in Thiele et al. 2008). Bracts imbricate, 8–12, in two whorls of 4–6, suborbicular to broadly ovate (inner whorl longer and narrower than the outer), 1.2–2.6 mm long, fleshy, pale orange-brown darkening and withering at the tips at anthesis. Perianth segments (tepals) 4 or 5 (–8), similar to the bracts but with somewhat attenuate bases. Disc and column dull pinkish orange, epigynous. Male flowers with central column (synandrium plus sterile gynoecium) shorter than the perianth, slightly inflated and dome-shaped at apex, bearing a marginal ring of embedded anther-sacs below a ring of short papillae. Female flowers with an inferior to half-inferior, unilocular ovary and a short, thickened, column-like style expanded at the apex with a marginal, papillate stigmatic area and terminal depression. Berry depressed-globose, 2.5–3.5 (–4) diam., exposed within the erect to spreading bracts and perianth, scarlet to bright orange-red, surmounted by prominent, darkened remnants of the stigma.
Pilostyles coccoidea is parasitic on species of Jacksonia. It has been found on Jacksonia floribunda Endl. and J. nutans Chappill., in low to tall, dense heath vegetation on sandy soil over laterite. See Thiele et al. (2008) for more details.
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