Ontogenesis and population structure of Fritillaria camschatcensis (Liliaceae) in the northern part of the species range (Magadan region)

The population of Fritillaria camschatcensis, which dominates in spring on the seaside slope within the forb meadow, is represented by sprouts, juvenile plants, immature, virginal, young and mature generative, temporarily non-flowering plants. Plants in the immature, virginal, young and mature generative states are characterized by the formation of up to two stolons with particles rejuvenated to the state of an immature plant. According to Zhukova's classification, the life cycle is classified as type D. The gender structure of the population is close to the ratio of 1:1. The ontogenetic spectrum of the population is normal, a large group of immature plants imparts to the spectrum a pointed peak and positive asymmetry, characteristic of the species and explained by the features of the life cycle. Compared with the southern boundary of the range, considered using the example of Japanese populations, the northern Okhotsk population is represented by a larger proportion of mature generative plants, a group of seedlings, the population density is several times lower than the density of the Japanese population, which is explained by a significant slope (on average 31°) and the scattering of seeds along the slope.