Crypsis schoenoides

(L.) Lam.
Common names: Swamp pricklegrass
Introduced
Synonyms: Heleochloa schoenoides
Treatment appears in FNA Volume 25. Treatment on page 140.

Culms 2-75 cm, prostrate to erect, sometimes geniculate, usually not branching above the base, but some plants profusely branched. Sheaths glabrous or ciliate at the throat, often inflated; collars glabrous; ligules 0.5-1 mm; blades 2-10 cm long, 2-6 mm wide, not disarticulating. Panicles 0.3-4 (7.5) cm long, 5-6 (15) mm wide, 1-5 times longer than wide, bases usually enclosed in the uppermost leaf-sheaths at maturity. Spikelets 2.7-3.2 mm, tardily disarticulating. Lower glumes 1.8-2.3 mm; upper glumes 2.2-2.7 mm; lemmas 2.4-3 mm; paleas 2-veined; anthers 3, 0.7-1.1 mm. Caryopses about 1.3 mm. 2n = 32.

Distribution

Ont., N.J., Mass., Ohio, Utah, Calif., Del., Mich., Wis., Oreg., N.Y., Pa., Ill., Ind., Iowa, Vt., Ariz., Mo., Nev.

Discussion

Crypsis schoenoides is common to abundant in clay or sandy clay soils around drying lake margins and vernal pools. In the Flora region, it is most abundant in California, but also appears to be established in a few other western states. It is known from a few collections in several eastern states (where it was first introduced in the late 1800s), though apparently none more recently than 1955. Its native range extends from southern Europe and northern Africa through western Asia to India.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Crypsis schoenoides"
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
Barry E. Hammel +  and John R. Reeder +
(L.) Lam. +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not disarticulating +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
pubescent +  and glabrous +
usually linear +  and lanceolate occasionally ovate +
2mm;6mm +
spikelike +
1.3 cm13 mm <br />0.013 m <br /> (?) +
triangular +  and dome--shaped +
sometimes longer +
membranous +
Swamp pricklegrass +
prostrate +  and erect +
geniculate +
2 cm20 mm <br />0.02 m <br /> (75 cm750 mm <br />0.75 m <br />) +
not woody +
Ont. +, N.J. +, Mass. +, Ohio +, Utah +, Calif. +, Del. +, Mich. +, Wis. +, Oreg. +, N.Y. +, Pa. +, Ill. +, Ind. +, Iowa +, Vt. +, Ariz. +, Mo. +  and Nev. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
bisexual +  and fertile +
round +  and compressed +
reduced +
shorter or longer +
subtending +
uncinate +
paniculate +  and racemose +
capitate +  and spikelike +
hollow +  and solid +
not absent +
mucronate +, not lobed +  and keeled +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
sometimes longer +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
inconspicuous +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
2 +  and 1 +
0.3cm +  and 4cm +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
dry +  and fleshy +
spikelike +
inflated +
Introduced +
disarticulating +
1 +  and 60 +
compressed +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Heleochloa schoenoides +
Crypsis schoenoides +
species +
membranous +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
7 +  and 13 +
aquatic +  and terrestrial +