I hear on standard servers it only takes 1 rare flower to tame a 150. I can confirm it does at 2.5 (5x old rates) rates at least. Also they look almost identical to Archas almost, especially at a distance or while mounted.
They are small and hard to see from disyance but are super easy to knock out regardless of level. Just a couple darts for lvl 150 with journeyman longneck for me. Use rare flower for super fast tame also... Just dont get too close on a mount with multiples of these little f***ers around.... They will wreck you very quickly