Nevada taxes marijuana like Colorado, with a weight tax (and a percentage-based retail tax).
It starts with a percentage rate. Nevada’s new tax law, passed by the Legislature and effective July 1, 2017, taxes all cannabis, medical and adult-use, at “15 percent of the fair market value at wholesale of the marijuana.” https://www.leg.state.nv.us/App/NELIS/REL/79th2017/Bill/5688/Text.
That’s in addition to the 10-percent retail tax, which applies only to adult-use product, not to medical cannabis.
“The Fair Market Value at Wholesale is utilized by the Department in levying the wholesale excise tax imposed pursuant to NRS 453D.500 on the sale of marijuana by a marijuana cultivation facility.” https://tax.nv.gov/uploadedFiles/taxnvgov/Content/FAQs/Fair%20Market%20Value%20at%20Wholesale_July_1_2017.pdf
“The Department determined that the excise tax upon wholesale sales of retail marijuana can effectively be levied upon seven product categories:
2. Small Bud
4. Wet Whole Plants
5. Immature Plants
The prices to be multiplied by the 15-percent rate include $2,145 per pound for flower and $631 per pound for trim. So the tax per gram is 70 cents for flower and 21 cents for trim. The chart, with several more categories, is at https://tax.nv.gov/uploadedFiles/taxnvgov/Content/FAQs/Fair%20Market%20Value%20at%20Wholesale_July_1_2017.pdf.
Whether these rates apply to non-vertically integrated transactions, I’m not sure. I don’t see a limitation, but would not be surprised to learn of one.