Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Scleranthus annuus

Scleranthus annuus subsp. annuus

annual knawel, German knotgrass, scléranthe annuel
Photo is of parent taxon

annual knawel, German knotgrass
Habit Plants annual or biennial.
Stems

erect to prostrate, 2–25 cm.
Leaf

blades 3–24 mm.
Flowers

usually equaling or exceeded by bracts;

hypanthium becoming strongly 10-ribbed in fruit, 1.2–2 mm;

sepals not overlapping, spreading to erect in fruit, 1.5–4 mm, margins 0.1 mm or less wide, apex acute;

stamens ca. 1/2 length of sepals.
“fruits” 3.2–5 mm including sepals.

2n

= 44 (Europe).

Scleranthus annuus

Scleranthus annuus subsp. annuus
Phenology Flowering winter–fall.
Habitat Sandy fields, roadsides, weedy areas, lawns
Elevation 0-1500 m (0-4900 ft)
Distribution
from FNA
AL; AR; CA; CT; DC; DE; FL; GA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; NE; NH; NJ; NY; OH; OK; OR; PA; RI; SC; TN; VA; VT; WA; WI; WV; AB; BC; NB; NF; NS; ON; PE; QC; SK; Europe; w Asia; n Africa
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; AR; CA; CT; DC; DE; FL; GA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; NE; NH; NJ; NY; OH; OK; OR; PA; RI; SC; TN; VA; VT; WA; WI; WV; AB; BC; NB; NF; NS; ON; PE; QC; SK; Central America (Costa Rica); Africa (Kenya, Republic of South Africa); e Asia (South Korea); South America (Ecuador); w Asia; including Mexico; widely naturalized elsewhere; n Africa; Europe; Pacific Islands (New Zealand) [Introduced in North America]
Discussion

Subspecies 8 (1 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 5, p. 150. FNA vol. 5, p. 150.
Parent taxa Caryophyllaceae > subfam. Alsinoideae > Scleranthus Caryophyllaceae > subfam. Alsinoideae > Scleranthus > Scleranthus annuus
Sibling taxa
S. perennis
Subordinate taxa
S. annuus subsp. annuus
Name authority Linnaeus: Sp. Pl. 1: 406. (1753) unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America, OregonFlora, UW Burke Herbarium

The species comparison tool is brought to you by:
Northwest Wildflowers