Echinochloa esculenta
Japanese millet
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Family: Poaceae · Type: Grass · Not Native
Echinochloa esculenta (Japanese millet) is a non-native California grass in the Poaceae family, recognized by dense inflorescence and broad, awnless spikelets.
Japanese millet is a naturalized perennial found in central western California, southern California coastal areas, and the Mojave Province in disturbed, often wet sites and fields at elevations below 1,300 meters. Flowering from August to October, this grass produces compact greenish-brown flower clusters 7 to 30 centimeters long with densely packed spikelets. Growing with robust stems 80 to 150 centimeters tall, it develops erect or spreading branches that often curve inward as they mature. Its leaves have glabrous sheaths and broad blades 10 to 50 centimeters long and 5 to 25 millimeters wide, with strigose nodes and scabrous internodes. The mature fruit is approximately brown, with small spikelets 3 to 4 millimeters long that have broadly ovate lemmas with shortly acute tips.
Identification and appearance
Key characters: 4 sympatric species; key features are dense inflorescence and broad, awnless spikelets
Habitat and range
Habitat: Disturbed, often wet sites, fields
Elevation: < 1300 m
Outside California: Arkansas, Florida, native to Asia
Bloom period
Echinochloa esculenta blooms Aug-Oct.
How to tell it apart
vs Sorghum: Echinochloa has no ligule and bristly inflorescence; sorghum has a ligule and smooth three-spikelet clusters.; vs Digitaria: Echinochloa lacks a ligule and has bristly branches; crabgrass has a ligule and finger-like smooth branches.; vs Paspalum: Echinochloa has no ligule and bristly flowers; dallisgrass has a ligule and smooth leathery spikelets.; vs Panicum: Echinochloa completely lacks a ligule on upper leaves; panicgrass has a membranous ligule present.; vs Eriochloa: Echinochloa has bristly spikelets without cups; cupgrass has each spikelet sitting in a distinctive cup.
Frequently asked questions
Is Echinochloa esculenta native to California?
No. Echinochloa esculenta is not native to California (recorded as not native).
When does Echinochloa esculenta bloom?
Echinochloa esculenta blooms Aug-Oct.
What plant family does Echinochloa esculenta belong to?
Echinochloa esculenta is in the Poaceae family, genus Echinochloa.
What habitat does Echinochloa esculenta grow in?
Echinochloa esculenta grows in Disturbed, often wet sites, fields.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CalPhotos
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.