— 229 — 
Experiments carried out in 1903 (Series 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) seeds collected July 28; sown in the beginning 
of May 1904; germinated June 4'h; planted out August 28th; 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"; discarded. 
(3) H. excellens Blocki*), growing in the Hieracium-plot of the 
Garden. Ripe seeds collected in August; sown as above, germi- 
nated June 4'» 1904; discarded. 
(4) 4H. pilosella L., growing in a lawn near a fasciated Sam- 
bucus nigra in the Garden. Ripe seeds collected in August; sown 
as above, germinated June 13th 1904; planted out August 28; 
flowered copiously June 1905 (Nr. 59). 
(5) H. glaucum All., growing in the Hieracium-plot. Ripe 
seeds collected July 23 1903; sown as above; germinated June 
13th 1904; discarded. 
(6) H. Bornmiilleri Freyn. Ripe seeds collected August 1* 
1903; sown as above; germinated May 26 1904; discarded. 
(7) H. neocerinthe Fr. (determ. Dahlstedt)*), growing in the 
Hieracium-plot. Ripe seeds collected July 15% 1903; sown as 
above; germinated Maj 25t 1904; discarded. 
(8) A. sp. of Cerinthoidea (determ. Dahlstedt)°), growing spon- 
taneously in a shrubbery in the Garden. Ripe seeds collected 
July 11 1903; sown as above; germinated May 25% 1904; dis- 
carded. 
(9) H. longifolium Schleich. (revis. Dahistedt), growing in a 
propagating-plot in the Garden. Ripe seeds collected July 25% 1903; 
sown as above; germinated June 13! 1904; discarded. 
1) Published previously in extract in this periodical, see Ostenfeld & Raun- 
kiær (1903). 
2) i. e. After castration. 
8) Referred to by Ostenfeld & Raunkiær (1903, p. 411) as H. magyaricum 
Nag. & 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. cesium Fr. f.? by Ostenfeld & Raunkiær (1903). 
