1911] MACDOUGAL—OVARIAL TREATMENTS 247 
long, much shorter than the tubular portion of the hypanthium, 
the free tips 4-5 mm. long; petals rather delicate, 12-16 mm. long, 
truncate or slightly emarginate at the apex; filaments 8-ro mm. 
long; anthers 7-8 mm. long; pistil shorter than the stamens; 
stigmas 4-5 mm. long; capsule 3-3.5 cm. long, 7-7.5 mm. in 
diameter at the thickest point, finely pubescent, slightly curved, 
markedly narrowed at the apex.’ 
It is to be seen from the above description that O. biennis is 
capable of self-fertilization by reason of the superior length of the 
stamens, a fact that was demonstrated in the experimental grounds. 
To secure purely fertilized seeds, it was only necessary to inclose 
the inflorescence in a parchment bag during the opening of the 
flowers. : 
DERIVATIVE. 
Mature rosette-—Rosette 20 cm. or more in diameter, flat and 
quite symmetrical; leaves 9-13 cm. long; blades broadest above 
the middle, 3-3-5 cm. wide, dark green“and shining above, pale 
~ beneath, minutely pubescent on veins, some of mid veins reddish 
above, more or less irregularly and sharply denticulate to quite 
near the base of the margined petioles, margins wavy, undulate, - 
apex of the leaf somewhat twisted. 
Adult plant—Main stem 60-75 cm. high; stem stout, reddish, 
Somewhat angled, minutely appressed-pubescent, interspersed wit 
somewhat larger spreading cilia; branches starting from base of 
plant all the way up to top, numerous, 10-15 cm. long; stem 
leaves 7-10 cm. long, oblong-lanceolate, broadest about the middle, 
23 cm. wide, bright green, shining above, paler beneath, and pubes- - 
cent on veins, irregularly and sharply denticulate and somewhat 
Wavy margined; bracts varying from oblong to Janceolate, those 
of lower branches oblong, acute, r.5-2 cm. wide, those of upper 
branches 3-4 cm. long, narrowly lanceolate, acute, shining, and 
glabrate. (See plates XIV-XVI.) ay 
The transference of the parent and derivative to various locali- 
ties mentioned has resulted in some exceedingly interesting 
Teactions in which fundamental differences have been displayed. 
In New York and Tucson, the derivative has wider leaves of a more 
* Publication no. 24, Carnegie Institution of Washington. 1905. 
