Hibiscus arenicola A.S.Mitch.

Species

Angiosperms > Malvales > Malvaceae > Hibiscus

Characteristics

Subshrub or shrub 0.2–0.5 m high. Branchlets with very dense stellate hairs (hairs 0.2–0.6 mm long), indumentum yellowish to whitish. Stipules at length deciduous, linear, 2–3.5 mm long, 0.15–0.5 mm wide, indumentum of fine bristles and stellate hairs. Mature leaves: petiole 6–10 mm long, indumentum like branchlet; lamina broadly ovate to orbicular, unlobed, 8–15 mm long, 6–16 mm wide, rounded base, crenate or serrate margin, rounded apex, concolourous, indumentum generally similar on both surfaces, indumentum similar on veins and interveinal regions, stellate hairs on abaxial surface dense to very dense, rays 0.8–1.3 mm diam., hairs sessile to shortly stalked, multiradiate with 10–20 rays, stellate hairs on adaxial surface dense to very dense (rarely moderate), rays 0.9–1.5 mm in diameter, sessile to shortly stalked, multiradiate with 8–28 rays, indumentum whitish to yellowish; distal leaves reduced in size. Flowers solitary in leaf axils; pedunculate, peduncle 3–6 mm long with very dense stellate hairs; pedicel 2–3.5 mm long, with stellate hairs, pedicel flattening distally. Epicalyx segments 9–11, linear, 5–12 mm long, shorter than the calyx at anthesis, free or very slightly fused at the base, recurved, with moderate to dense stellate hairs abaxially on the lobes and scattered simple hairs on the (very minimal) fused portion. Calyx 10–15 mm long at anthesis, enlarging to 25 mm long in fruit; lobes narrowly triangular, 3.8–6.5 mm long at anthesis, enlarging to 8.5 mm long in fruit, moderate dense to dense appressed 1-or 2-armed hairs distally (lobes), basally glabrous, hairs whitish to yellowish, lobes without prominent marginal ribs. Petals 12–16 mm long, adnate to staminal column at base but otherwise free, mauve, purple or pink, basal spot absent, glabrous adaxially, with sparse stellate hairs abaxially, on margins basally, sometimes with sparse, short, simple hairs  on margins of petals to apex. Staminal column 10–13 mm long, apex not toothed, with the stamens distributed singly or twinned along the distal 2–3 mm of the column; staminal filaments 0.5–1.5 mm long, anthers yellow to white, pollen yellow. Style 5-branched, with branches 0.4–1 mm long, exerted 0.5–1.5 mm beyond the apex of the staminal column, stigmas capitate, 0.4–0.5 mm wide, stigmatic hairs 0.4–0.9 mm long. Capsule broadly ovoid, 3–4 mm long, simple hairs to 2 mm long, on sutures, sparse basally, moderately dense apically, hairs extending beyond apex of capsule, capsule beak c. 0.2 mm long. Seeds subreniform, c. 2.5 mm long.
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Foliage retention deciduous
Sexuality hermaphrodite
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Mature height (meter) 0.2 - 0.5
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Environment

Recorded on sand dunes and sandy rises.
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Hardiness (USDA) 8-12

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Cultivation

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Germination treatment soaking
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Distribution

Hibiscus arenicola world distribution map, present in Australia

Identifiers

LSID urn:lsid:ipni.org:names:559947-1
WFO ID wfo-0000722294
COL ID 3LJG3
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Hibiscus arenicola