Much like no. 6 [Linum intercursum E. P. Bicknell], but with more numerous (mostly 50-150) lvs below the infl, these narrower, linear-oblanceolate or oblanceolate; infl mostly smaller; pet 6-10 mm; fr ovoid or ovoid-globose or pyriform, scarcely pointed; false septa nearly complete, glabrous, as also the true septa; 2n=36. Moist or dry woods and pine-barrens on the coastal plain; se. Va. to Fla. and La., n. in the Mississippi Valley to s. Ill.; isolated near D.C. June, July. (Cathartolinum f.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.