North America Non-native Plant

Justicia Candicans Var. Subglabra

Botanical name: Justicia candicans var. subglabra

USDA symbol: JUCAS3

Native status: Not native but doesn't reproduce and persist in the wild

The Mysterious Justicia candicans var. subglabra: A Gardener’s Puzzle If you’ve stumbled across the name Justicia candicans var. subglabra in your plant research, you’re not alone in feeling puzzled. This particular variety of the Justicia genus represents one of those botanical mysteries that even experienced gardeners scratch their heads over. ...

The Mysterious Justicia candicans var. subglabra: A Gardener’s Puzzle

If you’ve stumbled across the name Justicia candicans var. subglabra in your plant research, you’re not alone in feeling puzzled. This particular variety of the Justicia genus represents one of those botanical mysteries that even experienced gardeners scratch their heads over.

What We Know (And What We Don’t)

Here’s the honest truth: finding reliable information about Justicia candicans var. subglabra is like searching for a needle in a haystack. This variety appears to be either extremely rare, poorly documented, or possibly represents an outdated or regional classification that hasn’t made it into mainstream horticultural references.

The Justicia genus itself is well-known and includes many popular garden plants, but this specific variety seems to have flown under the radar of most gardening resources and botanical databases.

Geographic Distribution and Native Status

Unfortunately, the geographic distribution and native range of this particular variety remain unclear. Without this fundamental information, it’s impossible to determine where this plant naturally occurs or whether it might be appropriate for your local ecosystem.

Should You Plant It?

Given the lack of available information about Justicia candicans var. subglabra, here’s our recommendation: proceed with extreme caution, if at all. Here’s why:

  • Unknown growing requirements make successful cultivation nearly impossible
  • Unclear native status means you can’t assess its ecological impact
  • No available information about hardiness zones or care requirements
  • Potential identification issues – you might not actually have this variety

Better Alternatives to Consider

Instead of wrestling with this botanical enigma, consider these well-documented Justicia species that offer similar appeal:

  • Justicia brandegeana (Shrimp Plant) – excellent for warm climates
  • Justicia spicigera (Mexican Honeysuckle) – native to southwestern US
  • Justicia americana (American Water Willow) – great for native plant gardens

If You’re Determined to Grow It

Should you somehow acquire this plant or seeds, here are some general guidelines based on other Justicia species:

  • Most Justicia prefer well-draining soil with moderate moisture
  • Many species enjoy partial shade to filtered sunlight
  • Regular watering during growing season, with reduced water in winter
  • Watch for common pests like aphids and whiteflies

The Bottom Line

Justicia candicans var. subglabra remains one of those plant mysteries that reminds us how much we still don’t know about the botanical world. While the unknown can be intriguing, it’s usually better to stick with well-documented plants for your garden success.

If you believe you have this plant or encounter it in cultivation, consider reaching out to local botanical institutions or universities – you might be helping to fill in important gaps in our botanical knowledge!

Justicia Candicans Var. Subglabra

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Scrophulariales

Family

Acanthaceae Juss. - Acanthus family

Genus

Justicia L. - water-willow

Species

Justicia candicans (Nees) L.D. Benson - Arizona water-willow

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