Immediately after moss bouquet assembly, the clip was closed for 30 minutes to allow shoots to acclimate to darkness (i.e., PSII reaction centers open). At precisely 30 minutes, the clip was attached to a Hansatech Pulse-Modulated chlorophyll fluorescence probe (FMS 2, Hansatech Instruments, Norfolk, UK) and fluorescence was measured with the following parameters: actinic light of 150 µmol m-2 s-1 for 200 s; saturation pulse of 3000 µmol m-2 s-1 for 0.8 s applied before and after actinic light to measure dark- and light-acclimated fluorescence metrics, respectively. Fluorescence was measured three times over eight days in a recovery series: T0.5 (0.5 hours post-rehydration), T24 (24 hours post-rehydration), and T192 (192 hours post-rehydration). Between recovery measurements, bouquets were recovered in a growth chamber on modified 24-well plates called “water thrones” as described in (Clark, 2020), which allowed bouquets to remain hydrated and near 100% RH through a water-wicking system using filter paper and pools of water (Fig. S1). The Percival E30B growth chamber (Percival Scientific, Perry, Iowa, USA) was set to simulated winter recovery conditions consisting of a 10-hour photoperiod (12°C light, 5°C dark) with 70 – 85% RH at 150 µmol m-2 s-1 in which temperature and RH were monitored with an iButton data logger (Maxim Integrated, San Jose, CA, USA).