Chapter Palemon to Palm Tree of P by Brewer's Phrase & Fable

Palm Sunday The Sunday next before Easter. So called in memory of Christ's triumphant entry into Jerusalem, when the multitude strewed the way with palm branches and leaves. (John xii.)
   Sad Palm Sunday. March 29, 1461, the day of the battle of Towton, the most fatal of all the battles in the domestic war between the White and Red Roses. Above 37,000 Englishmen were slain.

“Whose banks received the blood of many thousand men,
On `Sad Palm Sunday' slain, that Towton field we call ...
The bloodiest field betwixt the White Rose and the Red.”
Drayton: Polyolbion, xxviii

Palm Tree is said to grow faster for being weighed down. Hence it is the symbol of resolution overcoming calamity. It is believed by Orientals to have sprung from the residue of the clay of which Adam was formed.