Baja California. The hybrid between Equisetum hyemale and E. laevigatum, E. × ferrissii, was mistaken for E. laevigatum by Schaffner and some subsequent authors
3 KB (279 words) - 21:23, 5 November 2020
monograph of Equisetum subgenus Equisetum. Nova Hedwigia 30: 385--455. Equisetum hyemale, Equisetum laevigatum, Equisetum ramosissimum, Equisetum scirpoides
2 KB (153 words) - 21:21, 5 November 2020
81--109. Hauke, R.L. 1979. Equisetum ramosissimum in North America. Amer. Fern J. 69: 1--5. Equisetum subg. Equisetum, Equisetum subg. Hippochaete window
10 KB (489 words) - 15:20, 2 June 2022
The sterile hybrid, Equisetum X ferrissii (E. laevigatum X hyemale) was construed as a "variety" of one of the parents, E. hyemale. The fertile hybrid
69 KB (10,503 words) - 23:43, 13 February 2019