Stems scattered on a creeping rhizome, 1-3 dm; lvs linear-spatulate to oblong-linear, attenuate at base, those of the main axis 1-3 cm; petaliferous fls in a terminal cymose cluster of 2-6, later often surpassed by the lateral branches; outer sep evidently shorter than the inner, the free tip of those of the cleistogamous fls reduced to a mere knob 0.2-0.5 mm; frs of open fls with 12-15 seeds; otherwise much as in n. 3. Dry, sandy soil; Mass. and se. N.H. to Md., and disjunct in the mts. of N.C. and Tenn. Blooming earlier than no. 3, and later than no. 1 [Helianthemum canadense (L.) Michx.].

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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