Taxon: Leucobryum boninense

Plate 65. 1–6, Leucobryum aduncum var. aduncum. 1, 2, leaves (× 20). 3, apical leaf cells (× 200). 4, basal leaf cells (× 310). 5, cross section of leaf base (× 180). 6, cross section of upper portion of leaf (× 180). 7–11, Leucobryum boninense. 7, 8, leaves (× 20). 9, apical leaf cells (× 200). 10, basal leaf cells (× 200). 11, cross section of leaf base (× 200). (1–6, drawn from W.-X. Xu 6840, HYBU; 7–11, drawn from Handel-Mazzetti 21639b, H.)