Maroon Hugger reveals a sense of danger in contrast to the lightness of Dance of Trees. LU Song attempts to hint at the harsh laws of nature by drawing the flytrap. I say "hint" because LU Song's technique of drawing the flytrap is very literal; the combination of eyelash-like lines has a feminine elegance, but the lines' power and stance also make a strong statement. The stylized design makes it challenging for the viewer to quickly recognise the flytrap image, yet it is simple to understand the emotion it conveys. Red hues with varying warm and cool undertones overlap each other on the screen; before they meet, they have been mixed and thinned to differing transparency. Consequently, certain areas of the colour have a unique haziness and lightness. The cautionary connotation of the colour red adds to the tension created by this emotion.

Unquestionably, the flytrap is a secretive topic for painting. The edges of its leaves extend regular soft spines in the form of eyelashes. Its short-term memory can last for approximately 30 seconds. If an insect taps on its stinging hairs, the flytrap will not respond right away; however, if the insect touches it again within 30 seconds, the flytrap will close its blades and kill its prey. This is why it is also known as the "Venus Flytrap". Natural selection and the survival of the fittest are reflected in its short memory and the certain end of its prey. Since mimicry and camouflage are common in nature, the flytrap's colours and patterns both draw in their victims and pique their curiosity. Peril and desire are akin to opposing sides of one coin. There are always unknown risks involved with living a life driven by desires. This series of works specifically conveys the idea that life finds inspiration in the facts and laws of nature.

与《树舞》散发的轻逸相反，《栗色怀抱》则暴露着一种危险。通过描绘捕蝇草，吕松试图在画面中提示出自然界的残酷法则。说是提示，是因为吕松勾勒捕蝇草的手法极具书写性，睫毛般的线条组合透着一种阴性魅力，同时，其线条的态势和力度又颇具冲击力。由于造型写意，观众很难快速识别出捕蝇草的形象，但却易于接收到图像所传达的感觉。画面上，不同冷暖倾向的红色互相交叠，它们在相遇前已被调和、稀释成不同透明度。因此，某些局部的色彩有着一种特别的轻薄感、朦胧感。此种感觉又和红色所具有的警示意味构成了张力。

作为绘画题材，捕蝇草无疑是诡秘的。其叶片边缘延伸出规则的软刺，形态如同睫毛，因而它又被称为“维纳斯的陷阱”（Venus Flytrap），它的短期记忆可以持续30秒左右，若有昆虫轻拍它的刺毛，捕蝇草不会立即反应，但昆虫若在半分钟内再次触碰它，捕蝇草就会合拢叶片捕杀猎物。它的短暂记忆和猎物无法避免的命运体现了自然选择和适者生存的原则。自然中充满模仿和伪装，捕蝇草的颜色和纹路不仅吸引着猎物，也搅动着它们的欲望。欲望与危险，如一体两面。生命在追求满足欲望的过程中，往往伴随着不可预知的风险。大自然中的现象、规律为人生提供着启示，而这正是此系列作品的画外之音。