386 BOTANICAL GAZETTE [MAY 
perfect analogy of this beautiful form with O. Lamarckiana mut. 
gigas and other giant mutants. 
From the self-fertilized seeds of this mutant I had a bed of 123 
plants in 1916. They were uniform, with the exception of some 
specimens of Jorea and one ochracea. By May all of them had 
Fic. 3 Fic. 4 
Fics. 3, 4.—Fig. 3, O. grandiflora mut. gigas, August 1915; flowering spike for 
comparison with fig. 1; a, opening flower bud of O. mut. gigas; 6, flower of O. grandi- 
flora, deprived of petals, for comparison with flower on spike of mut. gigas; ¢, open- 
ing flower bud of O. grandiflora; d, buds for next day’s flowers of O. mut. gigas; ¢ 
same of O. mut. grandiflora; fig. 4, O. biennisxO. grandiflora, August 1915; to right 
laeta; to left velutina. 
broader and thicker leaves than O. grandiflora, which was cultivated 
next to it for comparison under exactly the same conditions. The 
leaves of the young plants in June were 7 cm. broad, 20 cm. long, 
and a deep, downy green. In July the height was 60-70 cm., but 
the differences remained the same and very striking, the leaves of 
O. grandiflora being clearer green and only 4cm. broad. The stems 
