[Vor. 4 
4 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
whorls of petals, while other members of the Brachyceras 
group usually have but three. The arrest of the outer row 
of stamens is evidenced occasionally by a slight malformation 
of one or two petals, with indications of the bilocular anthers 
at the apex. The flower suggests the subgenus Castalia by 
its subconical buds and the open petals which rest on the 
surface of the water during the third and fourth day. 
Description — 
Flowers 8-10 inches 
across, opening 5—6 
successive days from 
7 A. M. to 6:30 P. M. 
during August, 4-6 
open at one time, ex- 
tremely fragrant; bud 
ovate to ovate-conical, 
light green; peduncle 
rising 7 inches above 
water, in cross-section 
showing 6 main air- 
canals surrounded by 
12, these again by 24 
smaller ones; recep- 
tacles yellow; sepals 
. 9. Nymphaea castaliflora: а, sub- 
merged leaves of seedling; b, first floating leaves. 4-wedged, ovate, 34 
Natural size. inches long, 14 inches 
wide, prominently hooded at the apex, thick, fleshy in texture, 
outer surface light green with pink margins, inner surface 
light pink, light green at the base, showing 10-15 nerves; 
petals 45-60; outermost whorl lanceolate, obtuse, slightly 
hooded at the apex, 34 inches long, 3-1 inch wide, with 
the outer surface light pink channeled longitudinally with 
green, thickish in texture except along the margins, 7-8- 
nerved, and the inner surface light pink; the inner whorls 
pink, slightly acute, becoming shorter, narrower, and sub- 
acuminate towards the center; stamens 300-325; outermost 
whorl 13 inches long, with appendages ovate-oblong at 
the base, yellow, pink at the apex; the inner whorls 
