Krug’s Spikemoss: A Tiny Treasure from Puerto Rico’s Forests
Meet Krug’s spikemoss (Selaginella krugii), a fascinating little plant that’s neither moss nor fern, but something wonderfully unique. This diminutive green gem belongs to an ancient group of plants called spikemosses or lycophytes – think of them as living fossils that have been quietly carpeting forest floors for hundreds of millions of years.
What Exactly Is Krug’s Spikemoss?
Don’t let the name fool you – Krug’s spikemoss isn’t actually a moss at all! It’s a vascular plant that looks remarkably moss-like, with tiny, scale-like leaves that create a delicate, feathery appearance. Unlike true mosses, spikemosses have actual roots and a vascular system for transporting water and nutrients throughout the plant.
This perennial plant stays small and low-growing, making it perfect for creating living carpets in the right conditions. Its scientific name honors botanist Leopold Krug, who studied Caribbean flora in the 19th century.
Where to Find This Island Native
Krug’s spikemoss is endemic to Puerto Rico, meaning it naturally occurs nowhere else on Earth. In its native habitat, you’ll find it thriving in the humid understory of tropical forests, where it enjoys consistent moisture and filtered sunlight.
Is It Right for Your Garden?
Here’s where things get interesting – and a bit challenging. Krug’s spikemoss is definitely not your typical garden plant. This little beauty has very specific needs that make it tricky to grow outside its native Puerto Rican environment.
Best suited for:
- Tropical and subtropical gardens (USDA zones 10-11)
- Terrarium enthusiasts
- Specialty plant collectors
- Shaded, humid microclimates
Growing Conditions and Care
If you’re up for the challenge and live in the right climate, here’s what Krug’s spikemoss needs to thrive:
Essential requirements:
- High humidity (60% or higher)
- Consistent moisture without waterlogging
- Filtered or indirect light
- Well-draining but moisture-retentive soil
- Protection from direct sunlight and strong winds
Think of creating a mini rainforest environment – that’s the sweet spot for this tropical native.
Identifying Krug’s Spikemoss
Spotting this plant in the wild (if you’re lucky enough to visit Puerto Rico) requires a keen eye. Look for:
- Small, creeping growth habit close to the ground
- Tiny, overlapping scale-like leaves arranged in four rows
- Bright green color when healthy and hydrated
- Delicate, almost feathery appearance
- Preference for shaded, moist areas
Benefits to Your Garden Ecosystem
While Krug’s spikemoss won’t attract butterflies or hummingbirds (it reproduces via spores, not flowers), it does offer some subtle benefits. It can help retain soil moisture, prevent erosion in shaded areas, and adds an interesting textural element to plant collections. For the right gardener, it’s a conversation starter and a living piece of botanical history.
The Bottom Line
Krug’s spikemoss is definitely a specialist plant for specialist gardeners. Unless you live in a tropical climate or are passionate about unusual plants, you might want to appreciate this little wonder from afar. But if you love a gardening challenge and have the right conditions, this Puerto Rican native could be a unique addition to your plant collection.
Remember, this plant is endemic to Puerto Rico, so if you do decide to grow it, make sure you source it responsibly from reputable nurseries rather than wild collection. Let’s keep these botanical treasures thriving both in gardens and in their native habitats!
