Structure and habitat
Leptocereus scopulophilus may reach up to 5 m in height. The main branches are erect, while higher ones spread obliquely and branch extensively. They bear 4–7 flattened ribs with undulate margins. At Pan de Matanzas, plants occupied the southeastern slope of a limestone hill in the understorey of semi-deciduous forest, at a mean elevation of 212 m. The studied population area was described as 3500 m². The phenological paper mentions a total of 3 species localities known at that time. [Toledo et al. 2021, pp. 2–4]
Flowers, fruits and the annual rhythm
Flowers are bisexual and nocturnal, with a green, almost tubular spiny outer region. Salmon, sandy-brown and magenta flowers were distinguished at Pan de Matanzas. An individual usually opened 1–3 flowers per night. Fruits remain green or yellow-green and retain spiny areoles. The species is self-incompatible and requires pollination with pollen from another individual to produce fruits. [Toledo et al. 2021, pp. 4]
From January 2016 to December 2018, 50 adult plants were observed monthly. Maximum flower production occurred in April in all 3 years, although mean timing and intensity differed between years. Flowering was concentrated towards the end of the dry season, with fruiting extending into the start of the rainy season. At Pan de Matanzas the dry season was described as November to April and the rainy season as May to October. These are Cuban habitat timings and require separate interpretation in relation to plant rhythms under cultivation in Poland. [Toledo et al. 2021, pp. 3–7, 10–13]
Light beneath the canopy and branch dieback
The amount of light passing through the canopy showed the greatest number of relationships with developmental phases. Leaf fall in the dry season increased light availability to the cacti. Stem growth could overlap with flowering and fruiting. Branch segment dieback was concentrated towards the end of the rainy season and extended into the start of the dry season. The analysis was based on correlations and observations. Rodent damage to the sensor caused loss of temperature and humidity data from September 2016 to May 2017, limiting comparisons. [Toledo et al. 2021, pp. 4, 9, 12–13]
Mucilage and seed germination
The 2015 experiment used 1500 seeds from 15 fruits of different plants. Seeds with mucilage and washed seeds were compared under 3 exposure treatments corresponding to 10%, 30% and 100% sunlight. Each treatment had 5 replicates of 50 seeds. In shade, germination was 88.8 ± 5.21% with mucilage and 89.6 ± 3.29% after washing. Both groups gave 0% under full exposure. Conditions also differed in temperature, with the maximum under full exposure reaching 40.9°C. [Barrios et al. 2015, pp. 2–3 in the supplied PDF, Tables 1–2]
Mucilage did not increase the final proportion of germinated seeds, but delayed germination onset by about 2 days. The authors considered adhesion to the substrate and protection against predation as other possible functions. Those functions were not tested in this experiment. Separating light-intensity and temperature effects requires additional tests because both factors changed together in the greenhouse experiment. [Barrios et al. 2015, pp. 3–4 in the supplied PDF]
Controlled temperatures
The experiment published in 2025 used a different Pan de Matanzas seed lot, collected in January 2017. After 28 days, mean germination was 66.28 ± 13.63% at 25°C, 73.14 ± 10.76% at 25/30°C and 20.00 ± 6.92% at 25/35°C, with light for 8 hours per day. In darkness at 25°C it was 0%. Each treatment had 7 replicates of 25 seeds on 1% agar. Differences between this study and the 2015 greenhouse experiment concern seed lots, substrate and controlled conditions, so the values do not constitute a single combined test. [Barrios et al. 2025, pp. 3–4, 7–8, Tables 1–3]