The leaf-traces, where they traverse the cortex, have the structure of the foliar bundles in Cycads, for they are of the collateral type, and their xylem is mesarch, the spiral elements lying in the interior of the ligneous strand.
Vinen, loc. cit.), with gallic and ellagic acids, ligneous fibre, water, and minute quantities of proteids, chlorophyll, resin, free sugar and, in the cells around the inner shelly chamber, calcium oxalate.
Owing to the increased demand for finer work much attention has been given (see Basket) in recent years to the cultivation of the more ligneous and tougher species, S.
Sticks (two or three yearling osiers) are also grown for whitening and buffing: the less ligneous varieties of S.
Here also begins his long controversy with Rivinus (Augustus Quirinus Bachmann) which chiefly turned upon Ray's indefensible separation of ligneous from herbaceous plants, and also upon what he conceived to be the misleading reliance that Rivinus placed on the characters of the corolla.