XIX] BIBLIOGRAPHY 93 



disposition of the family, as nearly as it can be shown by a linear sequence, 

 would be thus: 



OPHIOGLOSSACEAE. 



(i) Helminthostachys (Kaulfuss, 1822). i species. 



(2) BotrycJiium (Swartz, 1801). 34 species. 

 § i. Sceptridiiim (Lyon, 1905). 



§ ii. En-Botrychiuni. 



§ iii. OsmundopteT'is (Milde, 1837). 



(3) Ophioglosswn (Linnaeus, 1753). 43 species. 

 § i. Eu-OpJiioglossuni. 



§ ii. Ophiodcrma (Blume, 1828). 



§ iii. Chciroglossa (PresL, 1845). 

 The primitive stock thus disposed in roughly phyletic sequence is not 

 known to have given rise to any more advanced derivatives. The Ophio- 

 glossaceae appear to have terminated as a blind evolutionary series, and they 

 stand to-day as an imperfectly modernised relic of the Palaeozoic Flora. 



BIBLIOGRAPHY FOR CHAPTER XIX. 



352. Russow. Die Histologic d. Leitb. Kryptogamen. St Petersbourg. 1872. 



353. HoLLE. Bau. u. Entvv. d. Veg. d. Ophioglossaceen. Bot. Zeit. 1875, p. 241. 



354. ROSTOWZEW. Rech. sur VOph. vtdgaiujii. L. Kjobenhavn. 1891. 



355. RoSTOWZEW. Beitr. z. Kenntniss d. Ophioglosseen. Mockba. 1892. 



356. POIRAULT. Rech. Anat. sur les Crypt. Vase. Ann. Sci. Nat. T. xviii. 1893. 



357. Bower. Studies. II. Ophioglossaceae. Dulau and Co. London. 1896. 



358. Jeffrey. Gametophyte of B. 7'irgifn'amifn. Trans. Can. Inst. 1896-7. 



359. Farmer and Freeman. Helminthostachys zeylanica. Ann. of Bot. xiii, p. 421. 

 1899. 



360. Engler and Prantl. Naturl. Pflanzenfam. i. 4, p. 499. Here the earlier literature 

 is very fully cited. 



361. Bower. Ophioglossjun simplex. Ann. of Bot. 1904, p. 205. 



362. Bruchmann. Prothallium von O. vulgatum. Bot. Zeit. 1904, p. 227. 



363. Bruchmann. Prothallium von B. Ltmaria. Flora. 1906, p. 203. 



364. Lyon. A new genus of Ophioglossaceae. Bot. Gaz. Dec. 1905, p. 455. 



365. Lang. VvothaWi oi Ophioglossion dcnd Helininthostackys. Ann. of Bot. 1902, p. 23. 



366. Lang. Studies in the Morph. and Anat. of the Ophioglossaceae. 



I. Branching of ^. Lunaria. Ann. of Bot. xxvii, p. 203. 191 3. 



II. 'Kxwhryo oi Hel?ninthostachys. Ann. of Bot. xxviii, p. 19. 1914. 



III. Khhome oi Helm, zeylanica. Ann. of Bot. xxix, p. i. 191 5. 



367. Chrysler. Fertile spike of Ophioglossaceae. Ann. of Bot. 1910, p. i. 



368. Chrysler. Is (9. /a/wrt/////^ anomalous? Bot. Gaz. Hi, p. 151. 191 1. 



369. Petry. Branching of Ophioglossaceae. Bot. Gaz. lix, p. 345. 1915. 



370. Petry. Anatomy of O. pendulu;/L Bot. Gaz. 1914, p. 171. 



371. VON GOEBEL. Organographie. il .Aufl., Teil. ii, Heft 2. 1918. 



