sclerenchymatous การใช้

• Some of the species contain silica in their bodies for rigidity and so the mesophyll often has sclerenchymatous idioblasts.
• In the Far East, " P . mandschuriensis " is an altogether smaller plant, with leaves 1.5-2.3 mm wide and 8-14 sclerenchymatous strands, stem 0.8-1.5 mm wide, and fruit 2.8-3.8 mm diameter.
• Grass-wrack pondweed is relatively easily distinguished from most other pondweeds by its combination of strongly flattened stems and sclerenchymatous strands in the leaf . " P . acutifolius " is similar in Europe but can be distinguished by its sharply pointed leaves, less branched habit and flower spikes with only 2-6 flowers on peduncles up to 20 mm long.
• Within its range, sharp-leaved pondweed is relatively easily identified from all other pondweeds except the closely related grass-wrack pondweed ( " P . compressus " ) by its combination of strongly flattened stems, sclerenchymatous strands in the leaf ( giving the submerged leaves an opaque appearance compared with the transparent appearance of other pondweeds ) and leaves with sharply pointed ( acute ) tips.