14 MUTANTS AND HYBRIDS OF THE OENOTHERAS. 



one-half as long as the tubular portion of the hypanthium, the free 

 tips 4 mm. long; petals delicate, linear or nearly so, 10 to 15 mm. 

 long, obtuse ; filament 9 to 10 mm. long ; anthers about 5 mm. long ; 

 style shorter than the stamens ; stigmas about 4 mm. long ; capsules 2 

 to 2.5 cm. long, 6 to 7 mm. in diameter at the thickest point, nearly 

 glabrous, mainly longer than the bracts. (PL IX, fig. 1.) 



This form included about 52 of the individuals grown during 

 1904. The other two forms may be characterized as follows : 



No. 2. — Bracts broadly lanceolate or ovate-lanceolate, round- 

 truncate at the base, about as long as the hypanthium ; conic portion 

 of the bud sparingly pubescent, 15 mm. long or less; hypanthium 

 stoutish, nearly terete, 28 to 30 mm. long, sparingly pubescent, 

 abruptly dilated at the top, and about 5 mm. wide at the mouth ; 

 sepals 14 to 15 mm. long, linear-lanceolate, about one-half as long as 

 the tubular portion of the hypanthium, the free tips about 5 mm. 

 long; petals firm, broadly linear or linear-oblong, 8.5 to 10 mm. 

 long, obtuse; filaments 8 to 9 mm. long; anthers 6 mm. long; style 

 shorter than the stamens; stigmas 6 mm. long; capsules 2.5 to 3 cm. 

 long, 7 to 8 mm. in diameter at the thickest point, with few scattered 

 hairs, slightly curved, narrowed to the apex. (PL IX, fig. 2.) Seven 

 individuals of this type were found in the cultures. 



No. 3. — Bracts oblong or ovate-oblong, narrowed at the base, 

 shorter than the ovary or slightly longer ; conic portion of the buds 

 stout, 9 to 1 1 mm. long, with few scattered short hairs; hypanthium 

 slightly ribbed, stoutish, 25 to 27 mm. long, becoming glabrous, rather 

 gradually dilated at the top and about 4 mm. wide at the mouth; sepals 

 9 to 10 mm. long, much less than one-half as long as the tubular 

 portion of the hypanthium, the free tips 3 to 3.5 mm. long; petals 

 broadly linear-oblong, 6 or 7 mm. long, obtuse ; filaments 6 mm. long; 

 anthers 4 mm. long; style shorter than the stamens; stigmas 3 mm. 

 long; capsules about 2.5 cm. long, 7 to 8 mm. in diameter at the 

 thickest point, with few scattered hairs, slightly curved, narrowed to 

 the apex. (PL IX, fig. 3.) Six individuals were seen, all of which 

 completed their seasonal development much earlier than the other 

 two forms. 



In the observations made during the earlier part of the develop- 

 ment of the plants nothing was recorded by which the three forms 

 might be distinguished, and hence the following characters may be 

 taken to apply to the entire lot, although it is probable that most of 

 the descriptions were made from mutant individuals. 



Seedling abotd two months old. — Leaves very sparingly pubescent; 

 blades oblong, elliptic or oval, the larger ones 8 to 11 mm. wide, 



