466 GYMNOSPERMS 



415. NoE, A. C, Penns>-lvanian Flora of Northern Illinois. 111. Clcol. Survey 

 Bull. 52. 1Q25. 



416. XoELLE, \V., Studien zur vcrgleichenden Anatomic dcr Conifcrenwurzeln 

 mit Riicksicht auf die Systematik. Bot. Zeit. 68: 169-266. 1910. 



417. NoREN, C. O., Ueber Befruchtung bei Juniperus communis. Vorlaufige 

 Mitteilung. Arkiv. Bot. Svensk. Vetensk.-Akad. 3:11. 1904. 



418. , Zur Entwickelungsgeschlchte des Juniperus communis. Uppsala 



Universitets Arsskrift 1907: pp. 64. pis. 4. 



41Q. , Zur Kenntniss dcr Entwickelung von Sii.xogolhca cons pic ua Lindl. 



Svensk. Bot. Tidsskr. 2:101-22. pis. j-g. 1908. 



420. Oersted, A. S., Bidrag til Naaletroeernes Morphologi. \'idens. Meddel. 

 Nat. P^oren. Copenhagen. 1864. 



421. Oliver. F. W., On some points of apparent resemblance in certain fossil 

 and recent g>'mnospermous seeds. New Ph\tol. i : 145-54. figs. 4-6. 1902. 



422. , The ovules of the older gymnosperms. Ann. Botany 17:451-76. 



pi. 24. figs. 20. 1903. 



423. , Notes on Trigonocarpon Brongn. and Polylophospermiim Brongn., 



two genera of paleozoic seeds. New Phytol. 3:96-104. pi. 2. 1904. 



424. , A new pteridosperm. New Phytol. 3:32. 1904. 



425. , On the structure and affmities of Slephanospermum Brongn., a 



genus of fossil gymnosperm seeds. Trans. Linn. Soc. London Bot. II. 6: 

 361-400. pis. 41-44. 1904. 



426. , Ueber die neuentdeckten Samen dcr Steinkohlenfarne. Biol. Cen- 



tralbl. 25:401-18. figs. 6. 1905. 



427. , "The origin of gymnosperms ' ; a discussion at the Linnacan So- 

 ciety, New Phytol. 5:68-76, 141-48. 1906. 



428. , Pteridosperms and angiosperms. New Phytol. 5:232-42. 1906. 



429. , On Phystoma clcgans Williamson, an archaic type of seed from 



the paleozoic rocks. Ann. Bot. 23:73-116. pis. 5-7. figs. 10. 1909. 



430. Oliver, F. W., and Scott, D. H., On Lagenostoma lomaxii, the seed of 

 Lyginodendron. Proc. Roy. Soc. London 71 :477-8i. 1903 ; reprint in Ann. 

 Botany 17:625-29. 1903. 



431. , On the structure of the paleozoic seed Lagenostoma loma.xii, with 



a statement of the evidence on which it is referred to Lyginodendron. Proc. 

 Roy. Soc. London, Jan. 21. 1904 (abstract preprint); Phil. Trans. Roy. 

 Soc. London B 197:193-247. pis. 4-10. 1904. 



432. OsBORN, T. G. B., The lateral roots of Amyelon radicans Will., and their 

 mycorhiza. Ann. Botany 24:236-39. 1909. 



433. Ottley, Alice M., The development of the gametophytes ami fertiliza- 

 tion in Juniperus communis and Juniperus virginiana. Bot. Ciazctte 48: 

 31-46. pis. 1-4. 1909. 



434. Papadopoulos, SopmA, A morphological comparison of leaflets of a hy- 

 brid cycad and the two parents. Bot. Gazette 85:30-45. figs. 21. 1928. 



