ADA (a complimentary name). ORD. Orchideae. An evergreen orchid, very closely allied to Brassia, from which it differs chiefly in having the lip parallel with, and solidly united to, the base of the column. Some authorities now refer the plant to the genus Mesospinidium. It requires to be potted in peat and sphagnum, in equal parts. The drainage must be perfect, and, during summer, the water supply profuse. Although in winter far less will suffice, the plant should not be allowed to become dry. Propagated by divisions as soon as the plant commences growth. Ada aurantiaca (orange).* fl. orange-scarlet, in long terminal nodding racemes, each bearing from six to ten blossoms; petals elongated, streaked with-black inside. Winter and spring. l. two or three to each plant, linear, dark green, about 6in. in length. Habit erect, with somewhat cylindrical pseudo-bulbs, which taper upwards.