Smallest bathyphylls seen 2 cm long, pinnate as normal bathyphylls (not wholly dimidiate as in T. aculeatum). Normal bathyphylls to 6 cm long, pinnate to base on lower side of rachis, not quite to base on upper side; pinnae to 2 by 1.8 cm, with 4-5 pairs of oblique lateral lobes 3-5 mm long, each lobe pinnatisect with 2-4 linear divisions less than ½ mm wide; basal pinnae deflexed, overlapping rhizome. Transition bathyphylls to 12 cm long; pinnae to 4 by 1.5 cm, lobed as normal bathyphylls but with larger lobes which are more widely spaced; other specimens with lobes of pinnae ± coalescent, pinnae of the extreme form almost sessile with finely crenate edges and broad bases. Adult rhizome 4-5 mm ø, finely thorny. Sterile acrophylls with stipes to 20 cm long, lamina 45 cm; pinnae all stalked (stalks of lower ones 6-9 mm), 10-20 cm long, 1-2 cm wide, base slightly unequal, of lower pinnae narrowly cuneate, of upper ones wider, apex long-acuminate, texture rather thin, all parts turning reddish on drying. Fertile pinnae to 25 cm long, c. 2 mm wide.
Home