castanea sativa, sweet chestnuts hidden in spiny cupules

autumn branch brown brownish castanea chestnut chestnuts closeup cupule cupules daylight delicious detail diet edible fall foliage food fruit fruits green hanging healthy hidden husk leaf macro marron nature nobody nut nuts open opened ornamental park prickly raw ripe ripened sativa season seasonal seeds shell shrub spiny sunlight sunny sweet tasty thorn thorny tree wild