Note 25 — Chapter XXII · CAUSES OF VARIABILITY.
Reading edition
‘Journal of Horticulture,’ 1861, p. 112; on Zinnia, ‘Gardener’s Chronicle,’ 1860, p. 852.
Reading edition
‘Journal of Horticulture,’ 1861, p. 112; on Zinnia, ‘Gardener’s Chronicle,’ 1860, p. 852.