586 



78. Berberides constitute a curious order, though lia- 

 ble to some exceptions, of which its author was aware. 

 It entirely escaped the penetration of Linnaeus. 



79. Tiliacea a good order, likewise overlooked by him, 

 or partly confounded with his Columnifera, to which it 

 betrays some affinity. 



80. Cisti. Cislus which makes this order, is placed by 

 Linnaeus, after Hypericum, at the end of his Rotacea, 

 ord. 20. The reader may wonder to find Viola considered 

 as related to Cistus, or at least to those species which 

 Jussieu separates therefrom, by an incorrect character, 

 and a faulty name, Helianthemum. He attributes to these 

 a capsule of one cell ; but one of them at least, Cistus 

 thymifolius, has three cells. Viola, an anomalous genus, 

 29, with which it seems to have more points of agree- 

 is ranged by Linnaeus at the end of his Campanacea, ord. 

 ment. 



81. Rutacea. This is a very natural, and now become 

 a very extensive order, of which the genuine idea is con- 

 fined to Jussieu's second section, and likewise to the se- 

 cond section of Linnaeus's Multisiliquce, ord. 26. The 

 plants which compose it have alternate leaves, without 

 stipulas ; their herbage abounding with aromatic acrid 

 essential oil, lodged in pellucid cells, as in Jussieu's Au- 

 rantia, ord. 70. Calyx four- or five-cleft. Petals four 

 or five, alternate therewith. Stamens usually twice as 

 many as the petals, distinguished by something elaborate 

 or peculiar in their structure, by which the genera are 

 often well defined. Germen lobed. Capsule mostly of 

 four or five cells, each lined with a bivalve elastic tunic, 

 containing one or two polished seeds. Diosma and Em- 

 pleurum, subjoined as akin to Rutacea, are genuine spe- 

 cimens of the order, though the latter has a capsule de- 

 prived of three or four of its lobes or cells, and wants 

 petals. Meliauthus has no business here. It ranks with 

 the Linnaean Corydales, ord. 24, much more properly, 

 though a very puzzling genus. The students at Paris, 



