120 NOTICES OF BOOKS AND MEMOIRS. 



have been long known as inhabitants of the Channel Islands, and 

 it is most probable that the Cynosurus, at all events, which is a 

 well-known ballast plant, may have been originally introduced at 

 some remote date. The Briza bids fair to overrun the island, as it 

 seeds so freely. It has not been yet detected either in Sark, Herm, 

 or Guernsey. — J. Cosmo Melvill. 



Hypnum salebrosum, Hoffm.—Mv. H. Boswell has kindly 

 pointed out an error in my communication in the last number ol 

 this Journal ; the moss found by him was not 11. MUdamum, as 

 there stated, but H. salebrosum. He also reports that he has 

 received the true plant from Dorsetshire, where it was lately 

 gathered by the Rev. H. H. Wood. H. salebrosum, Hoffm., is 

 therefore known to occur in Forfarshire, Roxburghshire, Yorkshire, 

 Lincolnshire, Oxfordshire, and Dorsetshire ; and 11. Mildeanum m 

 Fifeshire, Lancashire, Cheshire, Lincolnshire, Kent, Sussex, 

 Somersetshire, Devon, and Cornwall; and, in Ireland, near Cork 

 and Dublin. Mr. Boswell also remarks that a North American 

 form of H. salebrosum has an almost cylindrical capsule, and. 

 approaches thereby to H. latum and H. acuminatum; and that this 

 species is as variable as H. rutabulum. — E. M. Holmes. 



Extract* an* Notices of i&oofts & Jlfemofr* 



TWO NEW NATURAL ORDERS. 



Two new Natural Orders — Balanopsea and LeitneriecE--^ 

 founded by Bentham and Hooker in the recently issued part of the 

 'Genera Plantarum,' from which we extract the following descrip- 

 tions. Balanop&ea is placed between EuphorbiaCM and Urtice®; 

 LeitneriecB between Platanacece and Jitylamleie, the following bemg 

 the diagnostic characters of each : — 



" Balanopsea. — Inflorescentia mas amentacea. Perianthium U 

 v. squamula minuta. Stamina 2-oo , antheris subsessilibus. Ovarium 

 imperfecta 2-loeulare. Ovula in loculis 2, ereeta, anatropa. 

 Fructus indehiscens. Seminis albumen copiosum, carnosum; 

 radicals infer a." 



11 Leitneriea.— Inflorescentia mas amentacea. Perianthium 0. 

 Stamina qo , bracteae affixa. Ovarium 1-loculare, 1-ovulatum. 

 Albumen tenue. Kadicula supera. Folia simplicia." 



"Ordo CLII. Balanopseje. 



Flores dioici, mas in spicis amentaceis sparsi, breviter pedi- 

 cellati v. subsessiles. Perianthium (v. bracteola?) ad apicem 

 " unilaterali. Stamina go (2-12 «»P«« 



unica 



