FIGURE 1–4 in Nitella singaporensis (Charophyceae, Charales): new species and implications for the taxonomy of the genus Nitella

FIGURE 1–4. General appearance and whorl and branchlet of Nitella singaporensis: 1—pressed and dried material (holotype: SING); 2—pressed and dried material (isotype: LE); 3—reconstruction of general habit of branchlet whorl (view from above) from the photo of ethanol-fixed specimen (isotype: LE) showing mean of terms used for branchlet description: 1—primary ray, 2—lateral secondary ray, 3—central secondary ray, 4—lateral tertiary ray, 5—central tertiary ray, 6—dactyls, yellow—lateral secondary segments, green—central secondary segment, blue—central tertiary segment, orange—lateral tertiary segment; 4—fertile branchlet of rewetted herbarium specimen showing oogonia arrangement (isotype: LE). Scale: 1 mm. Scale: 2—1 cm, 4—1 mm. Photo 1 by D. Liew, drawing and other photos by R. Romanov.