Although Muddz was correct,the actual question was
"what does Antaresia mean"
The Genus was named by Wells and Wellington after
Antares "the yellow giant star in the 'tail' of the constellation of Scorpius".
This is true but only shows where the Genus name originated from...
However the actual meaning of the word Antaresia is
"southern star" referring to Antares, the brightest star in the southern sky...
This giant star lies at a distance of 604 light years and at a magnitude of .96 it is the 15th brightest star in the sky (and probly the 2nd largest)...
The word Antares means
"anti-ares" rival of mars...
"Ares" is, of course, the Greek god of War who is also called Mars by the Romans.
Antares is linked to the planet Mars because they are both about the same color and the same brightness, so it is easy to get them confused... Antares is also known as Cor Scorpii,Kalb al Akrab,Vespertilio and Alpha Scorpii...
Scorpius is the legendary killer of Orion. Orion was a great hunter who bragged about his skills until the gods grew tired of his boasting. The scorpion was sent to punish Orion, who never thought of such a small creature as a threat. Once he was stung, it was too late. Both were placed in the sky although Orion's last wish was that he never be in the sky as the same time as the scorpion. Thus, Scorpius rule the northern hemisphere's summer while Orion rules the winter skies.
So the correct answer to the question would be
"Southern Star" 
PS
It is also known that Richard Wells later named hes daughter Antares..
