The above list includes over 500 varieties. Of these more than half 

 are known to be able to produce capsules and seed; many of the others 

 named are evidently incapable of yielding seed to any sort of pollination. 



Of the more than 400 varieties whose pollen was examined aJid 

 tested for germination only 33 had excellent pollen (Class a). A low 

 (fair) percentage of germination was obtained from 86 varieties (Class 

 b). There were 226 varieties whose pollen appears to be good but 

 which did not germinate in the cultures (Class c). There were 68 var- 

 ieties in this list which have anthers more or less imperfectly devel- 

 oped and which yielded very little or even no pollen. Pollen sterility 

 appeal's to be very general among the irises. 



Of the varieties listed in the table 1, 172 were studied both as to 

 ability to produce seed and as to potency of pollen. The summary of 

 these in respect to the classes made is as follows: Aa. 14 varieties; Ab, 

 8; Ac, 16; Ad, 7; Ba, 8; Bb, 13; Be, 37; Bd, 8; Ca, 2; Cb, 15; Cc, 36; and 

 Cd, 9. Thus of these, 22 varieties are more or less potent both as seed 

 and pollen parents (Classes Aa and Ab) and the varieties sterile both 

 ways (Cc and Cd) number 44. 



TABLE II. 



RECORDS FOR HAND POLLINATIONS 



In this table the variety which served as the seed parent is named 

 first and the variety used as pollen parent named second. The classes 

 assigned to the varieties (A, B or C and a, b, c, or d) follow in the same 

 order. The number of flow-el's pollinated is given. 



In the column of "results" a blank space indicates complete failure 

 for everj' flower pollinated, in that capsules did not start to develop. The 

 number of capsules obtained is given; numbers in bold indicate well- 

 formed fruits with presumably viable seeds, and numbers in ordinary 

 type indicate small, poorly developed, and seedless capsules. 



V.VRIKTIKS (ROSSKD 

 Seed parent Pollen parent 



Classes to •«'hleli 

 Varieties beloiii; 



See«l I'ollen 

 parent parent 



■/. 



/. 



C 4. = - 



Albert Victor, selfed 



X My Lady 



X 



X 

 X 

 X 

 X 

 X 

 X 



Alfred Fiddler, selfed 



X Walter Scott 

 X Hiawatha 

 X Honorabile 

 X Wm. Marshall 



Wm. Marshall 



Brionense 



Haydee 



I5smeralda 



Queen of May 



Plumeri 



Lavendulacae 



Alice, selfed 

 x' Mrs. 

 X Mrs. 



J. L. Curtis 

 Geo. Darwin 



X Australis 

 X Rollandiana 



2 

 1 

 1 

 1 

 1 



1 



2 



2 



o 



2 

 1 

 1 

 3 

 2 



2 

 2 

 1 

 1 



14 



