You got me to googling about Daylily Awards and I found some abbreviation definitions:
Pyramid of cultivar awards:
SSM: Stout Silver Medal—one award per year, the highest honor in awards pyramid
AM: Award of Merit—twelve per year, the second step toward SS
HM: Honorable Mention—first step toward SSM
Specialty cultivar awards:
ATG: Annie T. Giles for best small (more than 3" but less than 4 1/2" flower
DCS: Don C. Stevens for best eye
DFM: Donn Fischer Memorial Award for best miniature (less than 3" flower)
ESB: Early Season Bloom Award
ESF: Eugene S. Foster for best late blooming
HOS: Harris Olson Spider for best spider
IM: Ida Munson for best double
JC: Junior Citation for seedling
JEM: James E. Marsh for best purple or lavender (discontinued)
LAA: Lenington All American Award—one per year for outstanding performance in most AHS regions
LEP: L. Ernest Plouf for fragrance (discontinued)
LW: Lambert Webster for best unusual form
RWM: R.W. Munson, Jr. for best pattern
RPM: Robert P. Miller Memorial for best near white (discontinued)
RCP: Richard C. Peck for best tetraploid (discontinued)
XLD: Extra Large Diameter
AHS National Convention Awards (for cultivars seen on a garden tour during the annual national convention)
FS: Florida Sunshine Cup for best small or miniature on garden tour
GD: Georgia Doubles Award for best double on garden tour
NRS: Ned Roberts Spider/UF Award for best spider or UF on garden tour
PC: President's Cup for overall best cultivar on garden tour
