THE FEMALE GAMETOPHYTE 



SI 



seems reasonable, but it must be noted that the rudimentary 

 plate occurs also at the third mitosis, and so may be a reminis- 

 cence of a much more remote ancestry with cellular prothallia. 

 In connection with the reduction division it is of interest 

 to note the number of chromosomes found among Angiosperms. 

 The following table, arranged in the Engler sequence of fami- 

 lies, although more extensive than any hitherto published, is 

 far from complete. The numbers in parentheses were inferred 

 rather than actually counted: 



The Number of Chromosomes recorded for Certain Angiosperms 



Plant. 



Zostera marina 



Naias major 



Triticum vulgare 



Tradesvantia 



Eichhomia cratssipes 



Pontederia eordata 



Cblorophytum Sternbergianum 



Funkia Sieboldiana 



Allium fistulosum 



" ursinvm 



Gepa 



Li I in hi 



Martagon 



" candidum 



" croceum 



philadelphicum 



" ligrinum 



Fritillaria imperialis 



" Meleagris 



Tulipa Gesneriaiia 



Erijthronium americmium . . . . 



OaUonia candicans 



Sci/la non-scripla 



sibirica 



Muscari neglectum 



Convallaria majalis 



Trillium grandiflorum 



" recurvation 



Leucojum vernum 



Alsiroemeria 



psitlaeea 



Iris squalens 



Canna indica 



Cypripcdium harbatum 



CHROMOSOME NCMBERS. 



Observer. 



Rosenberg 92 

 Guignard " 

 Oyerton 28 

 Koernicke 43 

 Strasburger 20 

 Smith 53 



Strasburger 20 

 Strasburger ™ 

 Strasburger 20 

 Guignard 26 

 Sehaffner 55 

 Strasburger 20 

 Guignard 1IJ 

 Sargant 41 

 Strasburger 20 



Sehaffner 49 



Strasburger 20 

 Guignard 26 

 Sehn.-Thies 95 

 Sehaffner 98 

 Sehn.-Thies 85 

 Overton 28 

 Sehn.-Thies 95 

 Strasburger 20 



Wiegand 80 



Atkinson 64 

 The authors. 

 Overton 23 

 Strasburger 20 

 Guignard 26 

 Strasburger " 

 Wiegand 80 

 Strasburger 20 



Year. 



1901 

 1899 

 1893 

 1896 

 1888 

 1898 

 1898 

 1888 

 1900 

 1888 

 1891 

 1898 

 1888 

 1884 

 1896 

 1888 

 1888 

 1897 

 1897 

 1888 

 1891 

 1901 

 1901 

 1901 

 1893 

 1901 

 1888 

 1888 

 1900 

 1S99 

 19(12 

 1893 

 1888 

 1891 

 1900 

 19110 

 1888 



* One anther constantly 14. 



