Whatever might have been my impression in favour of the system of arrangement by affinities, the convenience and prevalence of the artificial system of Linnaeus, still almost exclusively taught throughout the United States, rendered some deference to public opinion due from the author of a treatise like the present, addressed merely to tho5^e who read the English language.Class II.-DIANDBIA Order I. -Monogtnia. A. Corolla inferior. *f Fruit a drupe or nut, 8. OLEA. Z. (Olive.) Calix small, 4-t()othed; tube of the corolla short, border 4-cleft, lamina more or less ovate. Lobes of the stigma emars^inate. Drupe 2seeded; one of the seeds usually abortive. f Leaves evergreen, very rarely alternate; flowers racemose or paniculate, axillary or terminal, in O.fragnms thg flowers simply ai^;-gregate . Species, i. O. .imericana. Flowers dioicous. Grows near the sea-coast. Fruit acerb. 9. CHIONANTHUS. L. (Frin^etree.) Calix 4-parted. Corolla deeply 4-parted.. lamina long ar.d linear. Anthers nearly sessile on the tube. Drupe 1 -seeded,^ut striated. Small trees with simple leaves, flowers resembling those of the Ornus^panicled, or more rarely corymf ose; panicles sometimes bracteate, axillary and terminal, trifid, or trichotomous, sometimes triandrous. Fruit and flowers pendulous. Species. 1. C. Virginica Most abundant near the seacoast, where it arrives at acouslderable maefnitude. Near Port Elizabeth, New-Jersey, my friend, Z. Collins, esq. saw a tree of the Chionmitluis near 30 feet hi<^h. Persoon rem a.^ks that the corolla of this species varies from 4, 5, to 6 cleft, and with 4 stamens! t Nut bilocular, one of the cells often obliterated. Gtertner, B2 digenous to the United States, -35 in India and its islands -8 m Arabia Felix-3 in Cnina, of which one is also common to Arabia-1 in Japan-5 m Africa, 4 of them at the Cape of Good Hope and 1 at Sierra Leone-1 in New Hoi-12 DIANDRIA. MOXOGYNIA. land-and 44 in the tropical regions of America, principally in the West-Indies, Carthagt-na, Cayenne, and Peru. Many of these latter species are highly ornamental. Thus attain we perceive a tropical g-enus almost equally divided between India and America. 19. UTRICULAR! A. Lin. (Bladder-wort.) Calix 2-parted, the lower division often einarginate, rarely cleft. Corolla scarrely tubulose, irregularly bilabiate, upper lip erect, entire or cniarginate, stamiijiferoiis; lower liwj^ev, entire, o-lobed, or crenate; palate more or less cordate, rather prominent on the inner side, calcarate at the base. Filaments of the stamina incurved; anthers connate. Stigma bilamellate. Capsule globular, I -celled, many-seeded (oj)ening by a lateral foramen?) receptacle of the seed, central, unconnected. An evanescent plant of ponds and stag-nant waters, rooting-, and rarely producing setaceous kaves; or loosely floa'in.y, producing leaves which resemble roots, alternate, demersed, and much divided; beset with numertjus inflated vesicles; also with proper radical leaves, v/hich are alternate, more rarely opposite or verticillate, entire, or dissected; fl...