704 BOTANY 



From the j>oiut of view of comparative morphology it is also possible to 

 speak of apospory in those Hieracia in which an embryo does not develop in the 

 embryo-sac (macrospore) but (according to O.STK.NKKI.D ami ROSEN ISKKI;) in a cell 

 of the nucellus which displaces and replaces the embryo-sac. 



( 109 ) HACKER, Jen. Zeitschr. f. Naturw. xxxvii. 1902, K. F. 30, also as separate 

 from G. Fischer. DE VKIES, Befruchtung u. Bastardierung, Leipzig, Veit und 

 Comp. 1903. 



In the Uredineae in which the formation of the secidium starts with a cell 

 fusion the nuclei remain distinct until the formation of the teleutospores ; the 

 cells are thus bi-nucleate (Bi-ACKMAX, Ann. of Bot. xviii. 1904. Christman, Bot. 

 Gaz. xxxix. 1905). 



( uo ) STEVENS, Bot. Gaz. 1899, vol. xxviii. pp. 129, 225. STEVENS, Bot. Gaz. 

 xxxii. 1901. 



A transition to the uninucleate condition of the oospore and to a normal 

 fertilisation is found in Alb. Tragopogonis. 



WINKLER (Merogony), Jahrb. f. wiss. Bot. xxxvi. 1901. ( m ) SOLMS-LAUUA< u, 

 Bot. Ztg. 1900, ii. 374. STKASBUKGEK, Bot. Ztg. 1900, ii. 307, 1901, ii. 353. 

 WINKLER, Jahrb. f. wiss. Bot. xxxvi. 1901, 753. ( 112 ) F. KouxiCKE in Handbuch 

 des Getreidebaues i. by KORNICKE and WERNER, Berlin, 1885, and Sitzber. 

 Niederrhein. Ges. f. Natur- u. Heilkunde, Bonn, 1872. NAWASCHIN, Ber. 

 dtsch. Bot. Ges. 1900, vol. xviii. p. 224. GUIGNARD, Compt. rend. vol. cxxviii. 

 1899, p. 869, and Ann. sc. nat. Bot., 8. ser. vol. xi. 1900, p. 365, Journ. de Bot. 

 xv. 1901. DE VRIES, Rev. ge"n. de Bot. vol. xii. 1900, p. 129. CORRENS, Ber. 

 deutsch. Bot. Ges. 1899, p. 410. STRASBURGER, Bot. Ztg. ii. Abt. 1900, p. 293. 

 CORRENS. Bastarde zwischen Maisrassen, etc., Bibl. Bot. 1901, Heft 53. ( 11S ) 

 CORRENS, Ber. dtsch. Bot. Ges. 1900, vol. xviii. p. 422. ( 114 ) H. SUHENCK, Die 

 Biologie der Wassergewachse, 1886. ( 11S ) CHR. K. SPRENGEL, Das entdeckte 

 Geheimnis d. Natur im Ban u. in der Befruchtung d. Blume^i, 1793. (Also in 

 Ostwakl's Klassikern, Xos. 48-51.) DARAVIN, Works. HERM. MULLER, The 

 Fertilisation of Flowers. F. HILDEBRANDT, Die Geschlechtsverteilung bi-i <lrii 

 Pflanzen, etc. 1867. 



MAC-LEOD, Bot. Jaarb. Dodon. Gent, 1890, gives 688, KNUTH in Handb. d. 

 Bliitenbiol. to April 1, 1898, 2871 papers on this subject. 



FR. JOHOW, Sitzber. K. Pr. Akad. d. Wiss. 1898. VOLKENS, in Schwendener- 

 Festschrift, 1899. F. JOHOW, Zur Bestiiubungsbiologie Chil. Bliiten, ii. Verh. 

 d. wiss. Ver. Santiago, vol. iv. p. 345. Valpar. 1901. Includes a list of 

 Ornithophilous flowers. E. WERTH, Verh. d. bot. Ver. d. Pr., Brandenburg, 1900, 

 vol. xlii. p. 222. BURCK (Chiropterophilous) flowers, Aim. Buitenzg. 1892. HART, 

 Bull, of Misc. Inform. 1897. MARLOTH, Ber. deutsch. Bot. Ges. xix. 1901. 

 DETTO, Flora, xciv. 1905. ANDREAE, Beiheft Bot. Zentralbl. xv. 1903. GILTAY, 

 Jahrb. f. wiss. Bot. xl. 1904. 



Flying insects appear to be mainly attracted by colours, and creeping insects 

 by scents, but no sharp distinction can be made on these lines. 



( 116 ) HILDEBRANDT, Ber. dtsch. Bot. Ges. 1896. Cleistogamy : GOBEL, Flora, 

 xcv. 1905. Ergbd. HACKEL, Osterr. Bot. Ztschr. Ivi. 1906. 



The pollen of chasmogamous flowers also, according to Gbbel, may germinate 

 within the pollen sacs in a damp hot-house. 



Monoecious and Dioecious Mucorineae : BLAKESLEE, Proc. of the Amer. Acad. 

 of Arts and Sciences, xl. 4, 1904. Heterostyly : ERRERA, Rec. de 1'Inst. bot. 

 de Bruxelles, 1905. ( m ) KOELREUTER, Vorlauf. Nachr. v. einigen das Geschlecht 

 der Pflanzen betreffenden Versuchen und Beobachtungen, 1761, 1763, 1764, 1766. 



