Cogswellia nudicaulis (Pursh) M.E. Jones
Seed sample from: 2011
Average Measurement: 10.7 x 4.9 x 0.9
Measurement Range: L: 9 – 12.5, W: 4 – 5.75, D: 0.5 – 1.1
Shape: Seeds widely winged and schizoid. Hilum puckered.
Color: Wings and ribs off-white to tan. Hilum is darker. Outer seed face has light to dark brown center, bisected by three tan ribs that cross longitudinally from hilum to opposite apex. Inner seed face is bisected by one major rib, and then has darker brown stripes mixed with tan stripes.
Surface: Seeds smooth and matte.
Seeds benefit from stratification. 
General: Stout perennial herb from a taproot, glabrous, strongly glaucous; stems solitary to several, 20-90 cm tall.
Leaves: Mostly basal, large, compound, 1-3 times divided; ultimate segments 3-30, entire or shallowly toothed, 2-9 cm long, 10-60 (rarely 4) mm wide, veiny, often stalked.
Flowers: Inflorescence of compound umbels; flowers yellow, small, stalks of unequal length; involucels lacking. 
- Propagation protocol for production of container Lomatium nudicaule Pursh plants; Corvallis Plant Materials Center, Corvallis, Oregon. In: Native Plant Network. URL: http://www.nativeplantnetwork.org (accessed 17 October 2006). Moscow (ID): University of Idaho, College of Natural Resources, Forest Research Nursery.