North America Non-native Plant

Sicyos Collinus

Botanical name: Sicyos collinus

USDA symbol: SICO16

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

Sicyos collinus: A Mysterious Member of the Cucumber Family If you’ve stumbled across the name Sicyos collinus in your plant research, you’re not alone in wondering what exactly this species is all about. This botanical name represents one of those intriguing plant mysteries that even seasoned gardeners and botanists encounter ...

Sicyos collinus: A Mysterious Member of the Cucumber Family

If you’ve stumbled across the name Sicyos collinus in your plant research, you’re not alone in wondering what exactly this species is all about. This botanical name represents one of those intriguing plant mysteries that even seasoned gardeners and botanists encounter from time to time.

What We Know (And Don’t Know)

Sicyos collinus belongs to the Sicyos genus, which is part of the cucumber family (Cucurbitaceae). This family is home to familiar garden favorites like cucumbers, melons, and squash, as well as various wild climbing vines. However, specific information about S. collinus is remarkably scarce in botanical literature and horticultural databases.

The limited available information makes it difficult to determine this plant’s native range, growing requirements, or garden suitability. This lack of documentation could indicate that S. collinus is either an extremely rare species, a regional variant that hasn’t been widely studied, or possibly a name that needs taxonomic clarification.

Should You Try Growing It?

Here’s where things get tricky. Without clear information about S. collinus, it’s challenging to provide specific growing advice or even recommend whether you should plant it. Here’s what we’d suggest:

  • If you’ve encountered seeds or plants labeled as Sicyos collinus, verify the identification with a local botanist or extension service
  • Be cautious about introducing any unknown plant species to your garden, especially those in the Sicyos genus, as some members can be aggressive spreaders
  • Consider well-documented native alternatives from the cucumber family that are appropriate for your region

The Sicyos Family Character

While we can’t speak specifically about S. collinus, members of the Sicyos genus typically share certain characteristics that might give us clues:

  • Annual climbing vines with tendrils
  • Heart-shaped or lobed leaves
  • Small, inconspicuous flowers
  • Spiny or bristly fruits
  • Fast growth and vigorous spreading habit

A Word of Caution

Some Sicyos species, like bur cucumber (Sicyos angulatus), can be quite aggressive and may overwhelm other garden plants. Without specific information about S. collinus, it’s impossible to know whether it shares these potentially problematic traits.

What to Do Instead

If you’re interested in native climbing vines for your garden, consider researching well-documented species that are native to your specific region. Your local native plant society, extension office, or master gardener program can help you identify appropriate alternatives that will provide similar aesthetic appeal without the uncertainty.

Sometimes the most responsible approach to gardening is knowing when to say I need more information before I proceed. In the case of Sicyos collinus, that time is now. Until more reliable information becomes available, it’s best to stick with plants whose growing requirements, benefits, and potential impacts are well understood.

The Bottom Line

Sicyos collinus remains something of a botanical enigma. While the mystery is intriguing, successful gardening usually relies on choosing plants with well-documented growing requirements and known benefits. If you’re determined to explore this species, work with botanical experts to ensure proper identification and assess any potential risks before introducing it to your landscape.

Sicyos Collinus

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Violales

Family

Cucurbitaceae Juss. - Cucumber family

Genus

Sicyos L. - bur cucumber

Species

Sicyos collinus B.L. Rob. & Fernald [excluded]

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