[25]

(Onion)

March 6th 1878. As seedling onion onion grows up, the upper part of the cot. cotyledon (?) bends upwards so as generally to rise stand at about 45 right angles with lower part, or more generally rise to about 45° above horizon, & some few even become nearly straight; but in every instance the uppermost part withers & dies.— The white prominence, which originally formed summit of arch, becomes green abounding with chlorophyll & more prominent, so as to be generally very conspicuous, & as the upper half of Cot. bends upwards is thrown to one side. — There is no thickening that I can see of whole Cot. at this point; but the epidermis seem rather thicker.— There is remarkable difference compared with arched hypocotyls & plumules in not straightening & in the death of the upper part.—