The Flora of Bird Island Research Station
Only twelve flowering plants have been reported from Bird Island. The majority are easy to find, but not always easy to tell apart. Only one specimen of annual meadow-grass has been seen, the fern is rare, small and well hidden, and although blinks has obvious white flowers, it was not reported prior to 2006. The following pictures and guide should help. The DAFOR scale of occurrence has been used to give some idea of frequency.
| Plant | Leaves | Flower | Detail |
|---|---|---|---|
| Acaena magellanica (Prickly burr (or burnet)) - Frequent in the meadows above the seal trampled areas. The leaves are grey-green and longer than wide. The flower heads are on erect stalks and about 1cm in diameter. Abundant. |  |
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| Acaena tenera (Lesser prickly burr) - Smaller and greener than the above, and generally growing a little higher up. The leaves are about as long as they are wide. The flower heads are on prostrate stalks and about 5mm in diameter. The detail shows the contrast between the two species. Frequent. |  |
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| Acaena tenera x magellanica (Hybrid prickly burr) - The cross between the two species, which has the grey green colour of leaves of magellanica but the small flower heads, short stalks and leaf shape of tenera. Occasional where the two parents grow close together. |  |
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| Callitriche antarctica (Antarctic water-starwort) - Common in boggy areas and along stream banks. The flower is tiny and only has yellow stamens and anthers. Abundant. |  |
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| Colobanthus quitensis (Antarctic pearlwort) - Light green cushion forming plant of drier areas. It is one of only two flowering plants found in Antarctica, however the flowers are tiny. Frequent. |  |
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| Colobanthus sublatus (Emerald bog) - Found in the wetter areas, but again generally cushion forming. The leaves are slightly broader and the cushion firmer and slightly more spikey, but the best way to tell them apart is from the flowers. In C. quitensis they stick out from the cushion, but in C. sublatus they are inside it. Frequent. |  |
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| Deschampsia antarctica (Antarctic hair-grass) - The grass that forms the lawn of the meadows. It is the other flowering plant found in Antarctica. Frequent. |  |
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| Hymenophyllum falklandicum (Falkland filmy-fern) - Grows in rocky crevices. Small (leaves around 5mm across, with a prominent vein) and difficult to find - I initially found a couple of plants growing on the rocky bluffs at the top of Wanderer Valley, on the east side, but later found a whole bank at the base of a rocky scarp in the same area. Rare. |  |
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| Montia fontana (Water blinks) - A new addition to the flora, first reported on 2006 February 18 by Jon Shanklin. Found at the eastern end of Molly Meadows, where it is well established in several patches, the largest some 100m2 in area, mostly in association with D. antarctica. Locally frequent. |  |
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| Poa annua (Annual meadow-grass) - Another new addition to the flora, first reported on 2006 February 20 by Jon Shanklin. A single plant was found on the west side of North Valley, most likely carried to the island from the mainland of South Georgia by birds. Rare. |  |
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| Poa flabellata (Tussac-grass) - The dominant plant of the lower slopes of the Island. Formerly known as Parodiochloa flabellata. Dominant. |  |
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| Ranunculus biternatus (Antarctic buttercup) - Common in the damper areas of meadows. The flowers (small and off yellow) seem to come out at a different time to the leaves. Frequent. |  |
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| Rostkovia magellanica (Short rush) - Found in some of the meadows. Occasional. |  |
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