[485] Baker (87) p. 4. Hooker, W. J. (61) Pl. LXXIV. Vide also Milde (67) for figures of Equisetum.
[486] Seeman (65).
[487] Duval-Jouve (64) Pl. I. fig. 5.
[488] Milde (67) Pl. XIX. fig. 8.
[489] ibid. Pl. XXXI. fig. 3.
[490] Cormack (93) p. 71.
[491] Williamson and Scott (94) p. 877. These authors, in referring to Cormack’s description of the secondary nodal wood of E. maximum, express doubts as to the existence of such secondary growth in all species of the genus.
[492] Pfitzer (67).
[493] Strasburger (91) p. 443.
[494] Strasburger (91) p. 435.