Flora of North America species comparison

usually ascending (prostrate in fruit), unbranched, 0.3–1.6 dm, moderately pubescent.

ascending to erect or, rarely, decumbent, usually unbranched, 0.3–1.7(–2.5) dm, densely pubescent.

blade margins pinnatifid or entire, surfaces moderately pubescent.

blade margins usually entire, sometimes weakly sinuate-dentate, surfaces densely pubescent.

petals white or purple-tinged, (3–)4–5.6 × (1.3–)2–3.3(–3.8) mm.

petals white, 4.4–6.9 × (1.9–)2.3–4.2 mm.

usually fertile and fully developed, not or weakly torulose, (1–)1.2–1.8(–2) mm wide;

septum often fenestrate (with circular perforations at regular intervals longitudinally or with a narrow, elliptical, longitudinal split at base or both).

often abortive, somewhat torulose, 0.8–1.2 mm wide when fully developed;

septum not fenestrate or split longitudinally.

= 42.

= 28.