MUTANTS AND HYBRIDS OF THE OENOTHERAS. 35 



ONAGRA (OENOTHERA) GIGAS. 



Seedling about two months old. Leaves finely but rather copiously 

 pubescent ; blades various ; those of the earlier leaves narrowly or 

 broadly oblong, those of the later leaves broadly oval, suborbicular, 

 or ovate-orbicular, mainly 3 to 4 cm. wide, abruptly narrowed at the 

 base, or truncate, longer than the petiole. 



Seedling five months old. Rosettes rather dense; leaves copiously 

 fine-pubescent; blades broadly oblong, oval, or ovate, varying to 

 obovate, the larger ones 2.5 cm. wide, distantly denticulate, obtuse or 

 nearly acutish at apex, markedly longer than petiole. (PL XX, fig. 2.) 



Mature rosette. Leaves ample, finely pubescent all over, the 

 larger ones about 28 cm. long, 9 to 10 cm. wide ; blades ovate and 

 prominently glandular-denticulate, or with an ovate terminal lobe and 

 several large basal teeth, or tooth-like lobes, with petioles very stout. 



Adult plant. Plant very stout and luxuriant. Stem channeled, 

 branched near the base, and mainly below the middle, the branches 

 assurgent or ascending, like the main stem hirsute, the hairs com- 

 monly widely spreading ; leaves finely pubescent, i to 2 dm. long, on 

 the lower part of the stem, numerous ; blades shallowly and rather 

 remotely toothed, those of the lower cauline leaves oblong-spatulate to 

 oblong, acute at the apex, each narrowed into a semi-terete, margined 

 petiole, those of the upper leaves broadly oblong to oblong-ovate, acute 

 or abruptly short-acuminate, sessile or nearly so ; bracts ovate-lanceo- 

 late, cordate or subcordate at the base; conic portion of the bud about 

 3.5 cm. long, finely pubescent, with short, spreading hairs, the free tips 

 of the sepals 6 to 7 mm. long ; hypanthium 4 to 4.5 cm. long, about 



7 mm. wide at the mouth, slightly ribbed ; sepals 4 to 4.5 cm. long, 

 about as long as the tubular portion of the hypanthium, the free tips 



8 to 9 mm. long; petals firm, 4.5 to 5 cm. long, truncate or slightly 

 emarginate at the apex; filaments 1 8 to 20 mm. long ; anthers 15 to 

 1 6 mm. long; pistil longer than the stamen ; stigma 6 to 7 mm. long ; 

 capsule about 2 mm. long, 7 to 8 mm. in diameter at thickest point, 

 finely pubescent all over, scarcely narrowed at apex. (PL XVIII.) 



