The genus Acianthus, while they are not particularly colourful (being small, brownish and very easily overlooked) they indicate why we are so interested in our orchids. Most orchid books list 2 Victorian species, caudatus and excertis. However, in 1991 excertis was divided into 2, excertis and pusillus. Then there were 3 and we have found 3. We called the Reef Hills orchids excertis as it was clearly different to the other 2 and we were happy that we had found all 3 Acianthus. Not so, as a new species (collinus) was identified in 1999 at Wodonga. The Reef Hills orchid is definitely collinus, so we have extended its known range and doubled its known Victorian sites. What a charge! Acianthus means spikey petals. Acianthus attract pollinating insects by odour and offer a nectar reward.