Plants › grasses
smooth crabgrass
Digitaria ischaemum
28 photos
Study shows up to four per card, from different observers, so you learn the species rather than one picture. Heart the good ones and swap any you do not like.
Photos you add are credited to you, and you keep the copyright.
Easily confused with
Hairy CrabgrassDigitaria sanguinalis
Bermuda grassCynodon dactylon
Tropical Finger-grassDigitaria ciliaris
Smooth WitchgrassPanicum dichotomiflorum
orchard grassDactylis glomerata
panic veldtgrassEhrharta erecta
Violet CrabgrassDigitaria violascens
common reedPhragmites australis
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| United States | 17,713 |
|---|---|
| Alaska | 13,719 |
| Canada | 1,301 |
| Ontario | 655 |
| Quebec | 494 |
| New York | 372 |
| Pennsylvania | 332 |
| Nova Scotia | 262 |
| Wisconsin | 260 |
| Russia | 260 |
Counts show where people looked, not only where it lives.
Traits
Group and habits
- Crop wild relativeListed as a crop wild relative or crop gene source by a harvested source.Kew World Checklist of Useful Plant Species
- Grass-like growth formListed by a harvested source as having a graminoid or grass-like growth form.USDA PLANTS Characteristics
- Annual plantListed by a harvested source as having an annual life duration.USDA PLANTS Characteristics
Classification
| Kingdom | Plants · Plantae |
|---|---|
| Phylum | Vascular Plants · Tracheophyta |
| Class | monocots · Liliopsida |
| Order | grasses, sedges, cattails, and allies · Poales |
| Family | grasses · Poaceae |
| Genus | crabgrasses, cottontops, and allies · Digitaria |
Study it in a deck
Or build your own from the species near you.
Sources
- Names, taxonomy and observation counts: www.inaturalist.org
- Photos and recordings: the creator and source are on each one.
- Traits: Kew World Checklist of Useful Plant Species (CC BY 4.0)
- Traits: USDA PLANTS Characteristics (U.S. Government work / public domain)
- How much to rely on each source
Remember the name next time.
Practise smooth crabgrass with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.