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[Archivist note:] Box C. 41G (G)

Scrap on Nectary on Bean seed.

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Pha. vulgaris ficus 9 in:6 –

Describe Bean externally & internally - & function relative size at different ages – nearest case of extra-floral nectary is in cotyledon of [Rist…] [insertion:] [illeg] – compare with Ruike

(But one chief interest in case is that Delpino Herman Müller (?) & others maintain that every floral & extra-floral nectary has been developed for special purpose – to attract insects for fertilisation or to keep ants from flowers or from leaves – F (Frank) advanced case if fern, but Fritz Müller's answer & such an answer cd be given to every case as yet recorded. Here in Kidneybean can have instance when can be of no case. – My father from case of Honey-dew manna &c & from the light the hypothesis throws on first origin of floral & extra-floral nectaries, maintained that under certain unknown conditions & at certain stages of growth sugar, though so precious a substance, formed was all in excess & had to be excreted; & this gives the foundation from which its development in greater quantity when beneficial could be gained.

M. Bonnier maintains that water is

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often transpired through stomata or through epidermis rendered specially thin, & that nectaries of all kinds consist of much spots, when sugar happened to be found & is then accidentally washed out. If sugar is occasionally produced in excess & has to be excreted, all this may hold good to a certain extent, but it is incredible that innumerable plants shd be so badly constructed that a precious material like sugar shd be manufactured at the very spot when the structured of the part renders it particularly liable to be wahed out & lost. But if it be primordially an excretion & this proves beneficial & has to be largely incurred to tempt insects for cross-fertilisation, then we can mention the frequency of floral nectaries & the abundance of nectar secreted, & we can further understand the interesting fact discovered by M. Bonnier that if insects are [prevented] coming to nectar it is re-absorbed.