FIGURE 12 in A preliminary study of the morphological variation of rhizomes in Zingiber Mill. and its role in taxonomy

FIGURE 12. Multi-planar rhizomes of Zingiber montanum (J.Koenig) Link ex A.Dietr. and Alpinia sp. A. Z. montanum (top view): Green bars on abscission scars of the rhizome units indicate the direction of leaf distichy of those units. These bars show that leaf distichy of a rhizome unit is perpendicular to its antecedent rhizome unit and its daughter rhizome units. Compare with Fig. 4E. Upper left inset: renewal buds (blue arrows) produced in lateral positions relative to the antecedent rhizome unit; lower left inset: prophyll (green arrow) of new bud located in abaxial position (this bud is at the apex of rhizome unit, i.e. the base of aerial stem); right inset: the scale (green arrow) on the third node of bud N and the bud from the second node (blue arrow) of the bud N are position at the lateral position of bud N. B. Alpinia sp, with an extravaginal young bud (top view, note that the first scale (a) is adaxial in relation to its associated scale (asl), while the second scale (b) has rotated about 45 degree, and the third scale onwards (c–f) are in lateral positions. Photos: Lin Bai.