North America Native Plant

Slender Popcornflower

Botanical name: Plagiobothrys tener var. subglaber

USDA symbol: PLTES

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Slender Popcornflower: A Delicate California Native Worth Knowing Meet the slender popcornflower (Plagiobothrys tener var. subglaber), a charming little California native that might just be one of the most understated wildflowers in the Golden State. While it may not have the showstopping presence of a California poppy, this petite annual ...

Rare plant alert!

Region: Conservation status by state

Status: S4T1T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ Subspecies or variety is vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals. ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

Slender Popcornflower: A Delicate California Native Worth Knowing

Meet the slender popcornflower (Plagiobothrys tener var. subglaber), a charming little California native that might just be one of the most understated wildflowers in the Golden State. While it may not have the showstopping presence of a California poppy, this petite annual forb has its own quiet appeal that native plant enthusiasts are beginning to appreciate.

What Makes Slender Popcornflower Special

This delicate annual belongs to the borage family and showcases the understated beauty that many California natives are known for. As a forb—essentially a non-woody flowering plant—slender popcornflower completes its entire life cycle in a single growing season, making it a fascinating example of nature’s efficiency.

Where You’ll Find It Growing Wild

Slender popcornflower calls California home, where it has adapted to the state’s unique Mediterranean climate and diverse ecosystems. This native status makes it an excellent choice for gardeners looking to support local wildlife and create sustainable landscapes that work with, rather than against, the natural environment.

A Note About Conservation

Here’s something important to consider: slender popcornflower appears to have conservation concerns, with a status that suggests it may be uncommon or rare in parts of its range. If you’re interested in growing this plant, it’s crucial to source seeds or plants only from reputable native plant nurseries that practice responsible collection methods. Never collect from wild populations.

Garden Design and Landscape Role

Due to its delicate nature and annual growth habit, slender popcornflower works best in specific garden settings:

  • Native plant gardens focused on California flora
  • Wildflower meadows or naturalized areas
  • Educational gardens showcasing local biodiversity
  • Low-maintenance areas where self-seeding annuals are welcome

Don’t expect this plant to be a garden showstopper—its beauty lies in its subtle charm and ecological value rather than bold visual impact.

Growing Conditions and Care

While specific growing information for this variety is limited, most California native annuals in the Plagiobothrys genus prefer:

  • Well-draining soils
  • Full sun to partial shade
  • Minimal summer water once established
  • Natural rainfall patterns that mimic California’s wet winters and dry summers

The Bottom Line: Should You Grow It?

Slender popcornflower is best suited for dedicated native plant gardeners who appreciate subtle beauty and want to support California’s natural heritage. However, given its potential rarity status, casual gardeners might want to consider other, more common California native annuals like baby blue eyes or five-spot.

If you do choose to grow slender popcornflower, make sure you’re sourcing it responsibly and giving it the specialized care that rare plants deserve. Sometimes the most valuable plants in our gardens are the ones that connect us most deeply to the wild spaces around us—even if they’re not the most Instagram-worthy specimens in the flower bed.

Slender Popcornflower

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

Lamiales

Family

Boraginaceae Juss. - Borage family

Genus

Plagiobothrys Fisch. & C.A. Mey. - popcornflower

Species

Plagiobothrys tener (Greene) I.M. Johnst. - slender popcornflower

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