[31] Cypripedilum = Cypripedium.
[32] Corallorhiza = Coralliorrhiza.
[33] This is Eichler’s view.—According to Drude the perianth is absent; at the base of the bracts, a nectary or cup-like disc. Prantl holds the same view. According to Pax the perianth is absent, but there is a disc cup-like, or reduced to a single toothed scale.
[34] The fruit of the Walnut is thus a false fruit; and the term drupe must therefore not be used in the same sense as in the Rosaceæ.
[35] The pollen-tube in Ulmus does not enter the ovule through the micropyle.
[36] According to Prantl, some species of Trollius (T. europæus, and asiatiacus) have a perianth, differentiated into calyx and corolla, which does not pass over into the honey-leaves. The outer leaves of the perianth have frequently an incised apex, the intermediate ones sometimes present transitional forms to the inner, and sometimes there is a distinct boundary between them.
[37] If we suppose a spiral line drawn through the leaves upwards on a stem with scattered leaves (in the shortest way), then the side of the leaf first touched is the catodic, or descending, and the other the anodic, or ascending side.
[38] Those marked [+] are officinal, and when no home is stated, the plant is a native.
[39] Those which are officinal are indicated by [+].
[40] Those marked with a [+] are officinal.