North America Native Plant

Smallseed Pygmyweed

Botanical name: Crassula longipes

USDA symbol: CRLO7

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Crassula drummondii sensu (Torr. & A. Gray) Fedde p.p. (CRDR2)  âš˜  Hydrophila drummondii sensu (Torr. & A. Gray) House p.p. (HYDR3)  âš˜  Tillaea aquatica L. var. drummondii sensu (Torr. & A. Gray) Jeps. p.p. (TIAQD2)  âš˜  Tillaeastrum drummondii sensu (Torr. & A. Gray) Britton p.p. (TIDR4)  âš˜  Tillaea longipes Rose (TILO2)   

Smallseed Pygmyweed: A Tiny Native Gem for Wet Garden Spots If you’re looking for a charming little native plant that thrives where others might struggle, let me introduce you to smallseed pygmyweed (Crassula longipes). This diminutive annual succulent might not win any height contests, but it’s got personality in spades ...

Smallseed Pygmyweed: A Tiny Native Gem for Wet Garden Spots

If you’re looking for a charming little native plant that thrives where others might struggle, let me introduce you to smallseed pygmyweed (Crassula longipes). This diminutive annual succulent might not win any height contests, but it’s got personality in spades and fills an important niche in southeastern gardens.

What is Smallseed Pygmyweed?

Smallseed pygmyweed is a delicate annual forb that belongs to the stonecrop family. Don’t let its small stature fool you – this little plant is perfectly adapted to life in wet, seasonally flooded areas. As a true native of the southeastern United States, it’s been quietly doing its thing in Alabama, Florida, Georgia, Louisiana, and Texas long before any of us started thinking about native gardening.

You might also encounter this plant listed under several historical names, including Tillaea longipes or various forms of Crassula drummondii, but Crassula longipes is the name that stuck.

Why Grow Smallseed Pygmyweed?

Here’s where this little charmer really shines:

  • Perfect for problem spots: Got a low area that stays soggy? This plant actually loves those conditions that make other plants sulk.
  • True native credentials: Supporting local ecosystems has never been easier – this plant evolved right here in the Southeast.
  • Low maintenance: Once established, it pretty much takes care of itself, reseeding naturally for next year’s display.
  • Unique texture: Those tiny succulent leaves create an interesting carpet-like effect that’s quite different from typical garden plants.
  • Pollinator friendly: While small, the delicate white flowers provide nectar for tiny native pollinators.

Garden Design Ideas

Smallseed pygmyweed works beautifully in several garden settings:

  • Rain gardens: Plant it in the lower, wetter areas where it can handle seasonal flooding
  • Native plant gardens: Include it as a ground layer plant among taller southeastern natives
  • Pond margins: Perfect for naturalistic edges around water features
  • Seasonal wetland gardens: Ideal for areas that mimic natural wetland conditions

Growing Conditions

This plant has some specific preferences, but they’re pretty straightforward:

  • Moisture: Consistently moist to wet soil is essential – think swamp edge rather than desert
  • Light: Full sun to partial shade works well
  • Soil: Adaptable to various soil types as long as they stay moist
  • Climate: Hardy in USDA zones 8-10, matching its native southeastern range

Planting and Care Tips

Growing smallseed pygmyweed successfully is all about mimicking its natural habitat:

  • Timing: Sow seeds in fall for spring emergence, following the plant’s natural cycle
  • Seeding: Direct seeding works best – just scatter seeds in suitable wet areas
  • Watering: Keep soil consistently moist to wet throughout the growing season
  • Maintenance: Minimal care needed once established – let it self-seed for future years
  • Patience: Being annual, it completes its entire life cycle in one growing season

A Word of Caution

Before you rush out to plant smallseed pygmyweed, consider whether you can provide the wet conditions it needs. This isn’t a plant for typical garden beds or drought-tolerant landscapes. It really needs that consistent moisture to thrive.

The Bottom Line

Smallseed pygmyweed might be tiny, but it’s mighty in the right spot. If you have a wet area in your garden that needs a native plant solution, or if you’re creating habitat for small pollinators and want something truly local, this little southeastern native could be just the ticket. Just remember – wet feet required, but once you’ve got that covered, you’re golden!

Smallseed Pygmyweed

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Rosales

Family

Crassulaceae J. St.-Hil. - Stonecrop family

Genus

Crassula L. - pygmyweed

Species

Crassula longipes (Rose) Bywater & Wickens - smallseed pygmyweed

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA