From left to right:

1. Drosera gunniana – Olive green, slightly branched plants from Metropolitan Melbourne. Seeds are pointed at one end with a prominent lobed appendage at the other end (shaped like a hand grenade)
2. Drosera hookeri – Bright green, prominently branched plants from the Golden Plains Shire west of Melbourne. Seeds are slightly squarish at one end, with a prominent lobe at the other end (shaped like a stubbie bottle)
3. Drosera peltata – Comparatively tall plants from northern Sydney. Seeds have a sharp point at one end and a very slightly lobed point at the other (shaped like a lemon)
4. Drosera gracilis – Comparatively short reddish plants from alpine Victoria. Seeds feature a long, tapering projection at one extremity and a lobed appendage at the other end (shaped like a flattened banana)

The dotted lines are spaced 1 mm apart.