List by family



Plant Group




Leaves are simple and flowers are in terminal inflorescences. There are 4-5 sepals and petals, and twice as many stamens as petals, often in two whorls. Ovary is inferior and fruit is usually a capsule.



All orchids have certain distinguishing features. The flower has three sepals (the calyx) and three petals (the corolla). There is a dorsal and two lateral sepals. In the corolla, the middle petal is usually modified to form the labellum, which is often ornately decorated with small glands (calli), this is usually the dominant feature that attracts insects for pollination. The reproductive organs, stamens and style, are fused to form a column.

Image of Diuris orientis Image: Gill Brown



Species are divided into two groups: small-flowered with four of the sepals and petals projecting forward like fingers (fairy or finger orchids) and larger-flowered suffused with red, thread-like sepals and petals (spider orchids). These species have a single leaf, usually hairy. Most are single-flowered.


Sun-orchids have a solitary, erect, channelled leaf sheathing at the base of the stem and 1-2 leafy stem bracts. The flowers are simple and all perianth segments similar in appearance. Identification is made through the column which varies considerably.


Herbs that lack chlorophyll that are parasitic on the roots of other plants. Leaves are alternate and scale-like. Flowers are in terminal spikes with a calyx of 4 or 5 parts that are unequally united into two parts. The corolla is fused with 5 lobes. There are 4 stamens in pairs of unequal length. Fruit is a capsule

Image of Euphrasia collina Image: Alison Kellow



Fern with rhizomes that often form an erect trunk. Sporangia are not in sori and are scattered on the underside of the frond. No indusium is present.

Image of Todea barbara Image: Alison Kellow

Fern or fern-ally


Oxalis species are usually hairy with trifoliate clover-like leaves and small yellow flowers followed by cylindrical fruit.