Joe - yes mostly from seed.
Woot Travis! Looking good! Some of my favorites in there, particularly the D. erythrorhiza!
Could be D. macrantha but I am leaning towards D. menziesii. D. macrantha usually puts out 3 traps at each junction. Two on shorter petioles to each side and one on a longer petiole in the middle (photo below). Your plant looks a little young yet so perhaps that may change things. Flowers will help ID but take note of the tuber color/shape also. D. menziesii are pink and D. macrantha whitish/yellowish (if I recall correctly).