Is anyone familiar with Spaneet citrange? The descriptions given are:
1. Deep orange rind color
2. Nearly seedless
3. Very juicy
4. Furrowed at pistol end
5. Size small - similar to Rusk
6. Very vigorous and productive
7. Cold hardy
Sounds very interesting, especially in regards to color, juiciness, vigor and productivity.
French translations tend to use the word "rustique" (rustic) to convey "hardiness".
Sources: Free >fr>trifoliates
and les cultivars de citranges (-13°C) Greffer.net