Benth. & Hook. f. Gen. Pl. i. 835 ECHINOPEPON, Naud. in Ann. Sc. Nat. Ser. V.iv. (1865) 17. HEXAMERIA, Torr. & Gray, in Torr. Rep. Pl. N. York, 137 (1839)[Geol. Surv.]. MARAH, Kellogg, in Proc. Calif. Acad. ii. (1863) 18; et i. ed.II. (1873) 37 MEGARRHIZA, Torr. & Gray, in Pacif. Rail. Rep. vi. 74, nomen(1857); xii. II. 61 (1860). {corrected when editing for database}