Species within a genus

aemulus, = striving after another earnestly, emulating, rivalling, emulous.
(rivalling, more or less equalling)
(ld, BL)

For Sir Joseph Banks (1743-1829).**
(Ch)

cernuus, = with the face turned towards the earth, inclined forwards, stooping or bowing forwards.
(slightly drooping, nodding; said of a flower – inclining a little from the perpendicular, so that the apex is directed towards the horizon)
(ld, BL)

di-, = two;
dis-, = twice, double;
stachys, = ear of corn.
(in modern botany, ‘spike’)
(when things are arranged in two rows, the one opposite the other)
(LS, BL)

vagina, = a scabbard, sheath; the covering, sheath, holder of any thing; the sheath of an ear of grain, the hull, husk;
(in botany occasionally the petiole embraces the branch from which it springs, and in such cases is said to be sheathing; and is even called a sheath or vagina as in grasses)
-atus, = indicates possession or likeness.
(sheathed)
(ld, Ox, BL)