24-8 Sir Edw. Ff. Bromhead's Memoranda 



the great transitions in nature are through small families, in 

 which the structure seems to want breadth, or what mechani- 

 cians would call stable equilibrium. A series of monographs 

 of the families and tribes, which are limited to a few species, 

 would be an important acquisition to science. 



Lycopodios^ correspond with Dr. Lindley's first section 

 of Acrogens. 



Cupressales. — These are the original Coniferce of Lin- 

 naeus, if we exclude Ephedra and Liquidambar. 



CuPRESSOSiE. — These are nearly the Lepidanthce aceroscc 

 of Shultz; or the Gymnosperms of Dr. Lindley's System. 

 Horaninow, an acute Russian naturalist, includes the Lyco- 

 podial and Osmundal unions with Lichens under the name 

 of Sporopkora? : " Synorrhizis sporae conglutinantur ad embry- 

 onem producendum, ipsis innatum." 



Betulales. — These are nearly the Amentacea: of Linnaeus, 

 who however placed Liquidambar among Coniferae, and 

 added to this alliance Myricaceae, Platanaceae, and Pistacia* 

 Herman notices this form of inflorescence under the name of 

 Julifera?. 



Betulos^s. — This formation perhaps more accurately re- 

 presents the Amentacece of Linnaeus. The Lepidanthce foliosce 

 of Shultz nearly coincide. The Micranthce of Agardh indi- 

 cate a property important in this part of the system. 



Rhamnales. — The Rhamnales of Dr. Lindley consist of 

 Rhamnaceae, Chailletiaceae, Tremandraceae, Nitrariaceae, Bur- 

 seraceae. Reichenbach includes several Rhamnales among 

 his Variflorce Parviflora. 



Euphorbiales. — The Tricoccce of Bartling are Stack- 

 houseae, Euphorbiaceae, Empetreae, Bruniaceae, Rhamneae, 

 Aquifoliaceae (Brexia), Pittosporeae, Celastrinae, Hippocra- 

 teaceae, Staphyleaceae. The Euphorbiales of Dr. Lindley are 

 Euphorbiaceae, Empetraceae, Stackhousiaceae, Fouquieraceae, 

 Celastraceae (Hippocrateae), Staphyleaceae, Malpighiaceae 

 ( Ery throxyleae). The Discigyna? Trihilatce of Agardh con- 

 tain many unarranged Rhamnales, Euphorbiales, and iEscu- 

 lales: calyx basi monophyllus, stamina definita discigena, 

 carpellis subconnatis subternis. 



JEsculales. — The Malpighince of Bartling are Malpighi- 

 aceae, Acerineae, Coriarieae, Ery throxyleae, Sapindaceae, Hip- 

 pocastaneae, Rhizoboleae, Tropaeoleae. The calycose struc- 

 ture of the Nixus appears here. 



Hypertcales. — The Guttales of Dr. Lindley's Calycosce 

 are Clusiaceae (Canelleae), Rhizobolaceae, Marcgraaviaceae, 

 Hypericaceae, Ochranthaceae. 



Limoniales. — The Meliales of Lindley are Meliaceae, 



