Jan., 1908.] Variation in Syndesmon and Hepatica. 



431 



VARIATION IN SYNDESMON AND HEPATICA. 



RoswELL H. Johnson. 



Prof. Kellerman, in the Ohio Naturalist for May, 1901, 

 published an article on Variation in Syndesmon thalictroides 

 (L) Hoffmg, based upon material from six Ohio localities, and 

 at the time he called for additional notes from other places. I, 

 therefore, venture to send to you the observations I have made 

 upon this species in four other states compared with his, together 

 with a similar study of Hepatica. 



RUE ANEMONE, SYNDESMON THALICTROIDES. 



From a study of the tables I-VII we may reach the following 

 conclusions. 



TABLE I— NUMBER OF FLOWERS PER STEM. 



Locality and Date. 



N 



10 



Av. 



Natick, Mass., Mav 6, '99 



A Stony Brook,(RR) Mass., May 7, '99 

 B " " Mass., May 7,'99 



E Yonkers, N. Y., Apr. 20, '99 



A Yonkers, N. Y., Apr. 21, '99 



Alpine, N. J., Apr. 23, '99 



Toledo, Ohio 



Steubenville, Ohio 



W. Mansfield, Ohio 



Rendville, Ohio 



Columbus, Ohio 



St. Marvs, Ohio 



A Riverside, 111., May 12, '00 



B Riverside, 111., May 12, '00 



Glencoe, 111., May 5, '00 



A Madison, Wis., May 2, '02 



" May 12, '02 



'• May 25, '02 



" June 10, '02 



" May 2.5, '02 



" June 10, '02 



75 

 83 

 13 

 46 

 38 

 13 

 30 

 17 

 11 

 12 

 12 

 18 



n 



66 

 65 

 93 



110 



41 



7 



74 



73 





 

 

 1 

 

 1 

 

 1 

 

 

 

 

 8 

 40 

 11 

 1 

 4 

 6 





 1 

 

 

 



1 





 

 

 

 

 

 7 

 19 

 6 

 4 

 6 

 6 



70 



53 



13 



31 



28 



10 



13 



7 



3 



9 



2 



16 

 4 

 43 

 52 

 59 

 38 

 13 

 1 

 25 

 22 



5 

 25 



15 



9 



3 



15 



8 



6 



2 



8 



2 



7 



20 



12 



14 



12 



7 



1 



29 



28 



Total 908 



73 50 



512 



228 38 I 4 I 2 



3.06 

 3.41 

 3.00 

 3.32 

 3.21 

 3.23 

 3.60 

 3.70 

 3.27 

 3.33 

 3.67 

 3.11 

 3.64 

 3.49 

 3.20 

 3.00 

 2.23 

 2.67 

 2.27 

 3.51 

 3.45 



1 3.15 



1. The typical number of flowers is three — a terminal one 

 and two lateral ones each in the axil of one of the involucrate 

 leaves. One of these lateral flowers may be missing, but in case 

 of reduction, both are more likely to disappear. Additional 

 flowers may appear, generally as additional axillary flowers to 

 the involucre, but in some cases, especially where there are 

 many, in the axils of additional leaves above or below the 

 involucre. 



2. All the characteristics studied vary from place to place as 

 determined, but since it also varies greatly from one grove to 

 another in the same vicinity and from time to time, the amount 

 of the variation which is truly geographical is difficult to 

 determine. 



