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Genus Drosera Family Droseraceae

Description: Perennial or annual herbs with rhizomes, fibrous roots, or tubers with vertical underground stolon. Stems usually very short, sometimes long and erect, [or climbing and to 1.5 m long].

Leaves circinate, either all basal in a rosette, or basal and cauline, or all cauline, the upper surface covered with glandular hairs that trap insects, rarely leaves glabrous.

Flowers mostly in cymes, often raceme-like, or solitary, usually terminal, often glandular. Sepals, petals and stamens mostly 5, free or the sepals shortly united at base.

Fruit a loculicidal capsule.


Photo © ANBG

Distribution and occurrence: World: about 90 species, world-wide. Australia: 54 species (42 species in SW Australia), all States.

Drosera aberrans (Lowrie & Carlquist) Lowrie & Conran was collected in 1876 in the south west of NSW on the Edward River in the Riverina area. This species is widespread in Victoria and South Australia. Telopea 12(2) 147–165 (2008).

Text by G. J. Harden
Taxon concept:

 Key to the species 
1Cauline leaves peltate with lamina concave, circular, reniform or crescent-shaped2
Cauline leaves absent, if present then lamina linear, spathulate or fan-shaped, not peltate6
2Sepals variously hairy, sometimes glabrous; margin fimbriate3
Sepals glabrous; margin entire, erose or denticulate
                       Back to 1
4
3Basal rosette of leaves red; cauline leaves <6 mm wide; sepals 0.1–1.5 mm wide; seeds ovoid to obovoid,0.4–0.8 mm long, with surface shallowly reticulateDrosera peltata
Basal rosette of leaves yellow-green; cauline leaves up to 10 mm wide; sepals 0.7–2.4 mm wide; seeds cylindrical, pandurate to obovoid, 0.5–0.8 mm long, with surface deeply pitted
                       Back to 2
Drosera hookeri
4Seeds always cylindrical, usually > 1 mm longDrosera auriculata
Seeds ovoid or arachiform, rarely cylindrical and then < 1 mm long
                       Back to 2
5
5Seed surface shallowly pitted; seeds ovoid, < 0.4 mm longDrosera lunata
Seed surface deeply pitted; seed shape variable, ovoid, arachiform to shortly cylindrical, 0.5–0.8 mm long
                       Back to 4
Drosera hookeri
6Leaves simple, linear or if forked then lobes linear7
Leaves simple, varying from orbicular, obovate to flabellate, never linear nor forked
                       Back to 1
10
7Leaves cauline, simpleDrosera indica
Leaves basal, simple or forked
                       Back to 6
8
8Leaves usually forked once, sometimes more; lobes 20–100 mm long; corolla whiteDrosera binata
Leaves simple, unlobed; corolla white to pink-mauve
                       Back to 7
9
9Inflorescences 15–30-flowered; corolla usually pink-mauve (cultivars of dark pink or white are available)Drosera capensis
Inflorescences 1(–2)-flowered; corolla white
                       Back to 8
Drosera arcturi
10Leaves sessile or petiole shorter than lamina11
Leaves with a distinct petiole, longer than the lamina
                       Back to 6
12
11Bracts simple; calyx minutely glandular; styles 3, divided in 2 to baseDrosera spatulata
Bracts trifid; calyx tuberculate; styles 5, filiform
                       Back to 10
Drosera burmanni
12Sepals and petals 5; inflorescence many-flowered, flowers orange or red; leaves not peltate, 10–20 mm longDrosera glanduligera
Sepals and petals 4; flowers solitary, white; leaves peltate, 3–7 mm long
                       Back to 10
Drosera pygmaea

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