Monographs Details: Richardia
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Genus Description - Fls 4–8-merous; sep foliaceous, ± connate at base; cor funnelform, with short lobes; stamens included; ovary (2)3–4(–6)-locular, with a single axile ovule in each locule; fr separating into (2)3–4(–6) nutlets; herbs, mostly diffusely branched, with fls in terminal involucrate glomerules. 15, trop. Amer.