Meanings of quercus robur in English

Quercus robur: tracks left on inclined smoked glass-plates by tips of radicles in growing downwards.

Quercus robur: radicle with square of card attached to one side of apex, causing it to become hooked.

Those of Quercus robur and Zea mays were highly sensitive to contact, as were the radicles of the latter to caustic.

Our British oak ( Quercus robur) has twenty-eight varieties; Quercus Lusitanica has eleven; Quercus calliprinos has ten; and Quercus coccifera eight.

Thus Quercus robur has twenty-eight varieties, all of which, excepting six, are clustered round three sub-species, namely Q. pedunculata, sessiliflora and pubescens.