— 229 — 



Experiments carried out in 1903 (Series I) 1 ). 

 Species of Hieracium growing in different places in the Bota- 

 nical Gardens of Copenhagen were castrated in the above described 

 manner during June and the beginning af July and the seeds 

 collected in July — August. 



(1) H. aurantiacum L., growing in the Danish Quarter of the 

 Garden. Ripe 2 ) seeds collected July 28 th ; sown in the beginning 

 of May 1904; germinated June 4 th ; planted out August 28 th ; flo- 

 wered copiously June 1905 (Nr. 58). 



(2) H. aurantiacum L., same clump; castrated later; ripe seeds 

 collected in August; sown as above; germinated June 13 th ; discarded. 



(3) H. excellens Blocki 3 ), growing in the Hieracium-plot of the 

 Garden. Ripe seeds collected in August; sown as above, germi- 

 nated June 4 1h 1904; discarded. 



(4) H. pilosella L., growing in a lawn near a fasciated Satn- 

 bucus nigra in the Garden. Ripe seeds collected in August; sown 

 as above, germinated June 13 th 1904; planted out August 28 th ; 

 flowered copiously June 1905 (Nr. 59). 



(5) B. glaucum AIL, growing in the Hieracium-plot. Ripe 

 seeds collected July 23 th 1903; sown as above; germinated June 

 13 th 1904; discarded. 



(6) H. Bornmillleri Freyn. Ripe seeds collected August 1 st 

 1903; sown as above; germinated May 26 th 1904; discarded. 



(7) H. neocerinthe Fr. (determ. Dahlstedt) 4 ), growing in the 

 Hieracium-plot. Ripe seeds collected July 15 th 1903; sown as 

 above; germinated Maj 25 th 1904; discarded. 



(8) H. sp. of Cerinthoidea (determ. Dahlstedt) 5 ), growing spon- 

 taneously in a shrubbery in the Garden. Ripe seeds collected 

 July 11 th 1903; sown as above; germinated May 25 th 1904; dis- 

 carded. 



(9) H. longifolium Schleich, (revis. Dahlstedt), growing in a 

 propaga ting-plot in the Garden. Ripe seeds collected July 25 th 1903; 

 sown as above; germinated June 13 th 1904; discarded. 



1 ) Published previously in extract in this periodical, see Ostenfeld & Raun- 

 kiær (1903). 



2 ) i. e. After castration. 



3 ) Referred to by Ostenfeld & Raunkiær (1903, p. 411) as H. magyaricum 

 Näg. & Pet. At that time I did not know that the species is a purely 

 female one. 



4 ) H. cerinthoides L. by Ostenfeld & Raunkiær (1903). 



5 ) H. cæsium Fr. f.? by Ostenfeld & Raunkiær (1903). 



