Where to find Yarrow and Male Silkmoths?

[Yonzheng]

Don't know if this the correct place to ask these, but anyway...

I got a Perc*Exp score waay over what I need to completely see all Yarrows, and haven't come by any yarrow so far, despite looking on the grasslands nearby. Could anyone point me, more or less, a place/coordinate on the Western continent to find either one of those things?

And a client doubt (don't know if this the correct place to ask this, tho. Probably not): I use the Amber Client, and one of the features is showing off things on map, like Silkmoths. Have only found female silkmoths so far, but do i need to actually catch them to check if they are male/female, or just trust the client and move on?

[fatfunnyvalentine]

Yarrow is guaranteed to be found in the Grass biome (the bright green plains with white stripy bits on the map), but it can be found in other grassland biomes.

The client only shows the female image, but male silkmoths can also be caught from them. It's completely random.

[Jackwolf]

The above if correct