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Utricularia sandersonii
Family Lentibulariaceae
Utricularia sandersonii APNI*

Description: Small, perennial lithophytic herb, 20–40 mm high. Rhizoids numerous, capillary, to c. 10 mm long, to c. 0.3 mm wide. Stolons present, glandular.

Leaves few, obovate, long-petiolate; lamina c. 10 mm long (including petiole), 2–3 mm wide, apex entire, venation indistinct, dichotomously branched. Traps few, on rhizoids and leaves, subglobular, stalked, 0.5–0.8 mm long; mouth slightly lateral to subterminal, dorsal appendage distinct, rounded, long-stipitate glandular, ventral appendage very short, forming a small stipitate glandular lip.

Inflorescence erect, simple, solitary, 2–7 cm high, few- to c. 4-flowered; peduncle terete, with scales few or absent, similar to bracts but smaller; non-floral bracts basifixed, ovate, 0.7–1 mm long, c. 0.3 mm wide; pedicel 1.5–2 m long; bracts triangular, c. 1 mm long, c. 0.5 mm wide, apex subacute; bracteoles 2, basifixed, c. 0.7 mm long, c. 0.1 mm wide, white with tinge of purple along length, apex subacute. Calyx 2-lobed, cucullate; lower and upper lobes ovate to sub-circular, 2.2–2.4 mm long (upper lobe larger than lower), c. 1 mm wide. Corolla 11–12 mm long, white with faint lilac tinge; spur curved forward (porrect) and directed slightly upwards, c. 10 mm long, cylindrical, slightly tapered, apex obtuse; lower lip obovate, c. 7 mm long, 4.5–5 mm wide, white, with green-yellow crescent-like marking near mouth (distinctly white-papillose medially between 'curve' of crescent, more distally with two lateral (narrow) lilac markings, then with additional, but indistinct green-yellow marking medially, and most distally with broad, darker lilac marking (darker laterally); lateral ridges 2, prominent, white; central ridges absent; margin slightly irregular to notched (crenate) distally; upper lip deeply 2-lobed, each lobe slightly obovate, divergent, 3.5–4 mm long, c. 1 mm wide, white with lilac strip medially. Staminal filaments curved, c. 1 mm long; locules subdistinct. Ovary ovoid, c. 1.2 mm long; style and stigma c. 2 mm long; stigma 2-lobed, lower lip semi-circular, upper lip deltoid, about as long as lower lip, receptive.

Capsule unknown.

C. Wardrop

Photo A.T. Fairley

Photo A.T. Fairley

Flowering: Not known, probably November and December .

Distribution and occurrence: NSW, Central Tablelands, Blue Mountains City Council Reserve, S of Blackheath.
NSW subdivisions: *CT
AVH map***

Text by B.J. Conn, E.A. Brown & A.T. Fairley
Taxon concept:

APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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