Pencil cactus possesses an intriguing stature that harmonizes with areas invigorated by the fire element, as per Feng Shui principles—a seamless fit with the south-facing direction. Yet, the abstract nature of Feng Shui suggests a potential variance in perceptions.

The greater celandine exemplifies the symbiosis of flourishing health and wealth, making it a beneficial addition in Feng Shui. However, positioned Southeast, it may instigate an imbalance due to its yang nature overriding the nurturing energy of this particularly yin-direction. Regardless, with careful placement away from main energy streams, it may tap into the sector's auspiciousness.

Lindheimer's muhly aligns with the Feng Shui tenets of tranquility and balance, potentially bringing positive energy to your spaces. As Southwest faces symbolize earth energy in Feng Shui, placing lindheimer's muhly in this direction adds greenery while respecting the required earthy tendency, implying a favorable compatibility without stating definitively this relationship.

The red ginger is a robust and vibrant plant which, in Feng Shui, may introduce a stimulating energy into the environment. As it is believed to harbor strong yang properties, its compatibility with the North direction is remarkable. This is due to the North embodying water energy which complements the firm, dynamic attributes of the red ginger. Please note that interpretations in Feng Shui may vary and the overall configuration of your space is important too.

The european spindletree represents adaptability and fortitude, contributing to a harmonious Feng Shui environment. Having it in a west-facing property may prompt beneficial chi-flow, as West symbolizes creativity and descendants in Feng Shui. Diversities in interpretation, however, make the pairing subjective.

The common asparagus fern is perceived to resonate harmoniously with an East-facing direction. Theories in Feng Shui draw parallels between the plant's thin, delicate fronds which invoke a sense of growth and renewal, synonymous with the distinctive characteristics of the East. However, interpretations may vary, as Feng Shui principles assume different forms in myriad contexts.

The fringed willowherb can be seen as a symbol of adaptation and transformation due to its characteristic growth patterns. When placed in the West, it might energize the metal elements of this direction, inspiring progress and evolution. However, its compatibility with Feng Shui principles may vary based on individual beliefs and situations.

The mexican fleabane is believed to harmonize well with south-facing areas. This small, yet resilient plant embodies elements of warmth, growth, and vibrant energy aligned with southern exposure. As Feng Shui is a personalized journey, your experience might differ and it's crucial to expect potential variations.