Five distinct genera were once included under the generic title of Mimosa, but separated by Willdenow into 102 Acacias, 58 Ingas, 9 Desmanthuses, 3 Shrankias, and 32 Mimosas. This susceptible species of Mimosa is an old inhabitant of the stove, and well known to cultivators by the appellation of the Sensitive Plant (but not to be confounded with the M. sensitiva, a very different species). Although this Mimosa is neither new nor rare, it is nevertheless very interesting, and has not hitherto made its appearance in any modern publication; nor is there any coloured figure of it extant. Our representation of it, therefore, is in part a novelty, however old and familiar the plant itself may be. According to the observations of Linnæus, it opens or expands its foliage at three in the morning, and closes it about six in the evening. Its singular quality of shrinking from the touch is supposed to be owing to its being strongly saturated with oxygen gas, which it disengages upon the slightest provocation, and its place for a short time is supplied by the atmospheric air; which retiring, the leaves again resume their former appearance, and so remain expanded till the evening, unless disturbed by design or accident; for the rude approach of the common air disorganises its foliage. The leaf is mostly composed of four divisions, but sometimes five and six may be found in plants of a luxuriant growth. Each division is supplied with numerous little leaflets, in pairs of an oblong form, with a small yellow gland at their base, which when carefully touched will close up separately, and leave the surrounding leaflets undisturbed. It may be considered either as an annual or a biennial, dying after ripening its seeds. Our drawing was made from fine plants in the collection of J. Vere, esq. [Illustration] PLATE DXLV. PROTEA ABROTANIFOLIA, _odorata_. _Sweet-scented Southernwood-leaved Protea._ CLASS IV. ORDER I. _TETRANDRIA MONOGYNIA._ Four Chives. One Pointal. ESSENTIAL GENERIC CHARACTER. COROLLA 4-fida, seu 4-petala. Antheræ lineares, petalis infra apices insertæ. Calyx proprius, nullus. Semina solitaria. BLOSSOM four-cleft, or of four petals. Tips linear, inserted into the petals below the points. Cup proper, none. Seeds solitary. SPECIFIC CHARACTER. PROTEA foliis multifidis, filiformibus, acutis, pilosis: floribus in capitulis terminalibus, lucidis, odoratis. Habitat in Caput Bonæ Spei. PROTEA with many-cleft leaves, thread-shaped, pointed, and hairy: flowers grow in terminal heads, shining, and sweet-scented. Native of the Cape of Good Hope. REFERENCE TO THE PLATE. 1. A flower, one tip magnified. 2. Seed-bud and pointal.