Sizeclass 2: Plant length ≥ 1cm and < 4.5cm
Sizeclass 3: Plant length ≥ 4.5cm and < 9.5cm
Sizeclass 4: Plant length ≥ 9.5cm and > 14.5cm
Sizeclass 5: Plant length ≥ 14.5cm and < 19.5cm

G1: Adult gametophytes 1 (frond size: 6-9cm)
G2: Adult gametophytes 2 (frond size: 9.01-13cm)
G3: Adult gametophytes 3 (frond size: 13.01-19cm)
G4: Adult gametophytes 4 (frond size: >19 cm)

Class 0: source from which frond initials arise
Class 1: Frond initials less than 0.5 m in length; usually with only a few blades apical scimitar present and growing
Class 2: Apical scimitar present and growing frond at least 0.5 m in length but less than 1 m long
Class 3: Apical scimitar present and growing frond at least 1 m in length but less than 1.5 m long
Class 4: Apical scimitar present and growing frond at least 1.5 m in length but less than 2.0 m long
Class 5: Apical scimitar present and growing frond at least 2.0 m in length, the fronds are long enough to reach into the top 0.5 meter of the water column at the surface
Class 6: Mature fronds apex of the frond has terminated; no new blades will develop, the fronds may continue to elongate, blade loss has begun below the water surface
Class 7: Senescent surface fronds, possess a terminal blade and pneumatocyst but blade loss has begun at the water surface; most remaining blades show severe tissue loss

V4: On top, 95-100% visible, but with contact with substratum or other bryophytes
V5: Emergent, 100% visible, no contact to substratum or other bryophytes

G2: Number of growing points with two or more years delay
G1: Number of growing points regenerating with one year delay

SC1 (size class 1): Psb (Pseudobulb length)<1.5 cm

A: Non-reproductive adult (longest leaf > 13 cm)
F: Reproductive adult (any size + flowering)

Non-reproductive adults (L: >10.5 cm; no flower)
Reproductive individuals (L: any; flowering)

T5: Non-reproductive adults (L: >10.5 cm; no flower)
T5: Reproductive individuals (L: any; flowering)
T6: Non-reproductive adults (L: >10.5 cm; no flower)
T6: Reproductive individuals (L: any; flowering)
T7: Non-reproductive adults (L: >10.5 cm; no flower)
T7: Reproductive individuals (L: any; flowering)
T8: Non-reproductive adults (L: >10.5 cm; no flower)
T8: Reproductive individuals (L: any; flowering)
T10: Non-reproductive adults (L: >10.5 cm; no flower)
T10: Reproductive individuals (L: any; flowering)