Fimbristylis thomsonii (Cyperaceae) is a very common sedge in grassland or hillside in Hong Kong. There are several features making it recognizable in the field: conical spickelets where scales are spirally arranged; leaf-like bracts; many spickelets (usually more than 2); and 3 stigmas on a single style which could be visible when it is in stigma receptive phase. Habitat is also a very important clue to rule out those coastal species in the long species list.It has quite a long flowering season which has been recorded to flower since April and I could still find many blooming ones at the end of August.
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