Fig. 1From: Vascular architecture of the monocot Cyperus involucratus Rottb. (Cyperaceae)Bracts. a Overall shape of bract. Bar is 18 mm. b Parallel veins with occasional cross veins. Initiation of new veins (arrows). Bar is 2.8 mm. c Initiation of a new vein with old intervein width (2d), new large intervein region (d L -v), new small intervein region (d S -v) and new vein width (2v). Bar is 100 µmBack to article page