Tuctoria mucronata

(Crampton) Reeder
Common names: Prickly spiralgrass
Endemic
Treatment appears in FNA Volume 25. Treatment on page 294.
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Culms to 12 cm, ascending, often decumbent or geniculate at the base; nodes usually concealed by the leaves. Blades 2-4 cm, involute, usually curved outward, tapering to a fine-point. Spikes 1.5-6 cm, more or less included in the upper sheaths at maturity, congested throughout; internodes 1-2 mm. Spikelets with 5-10 florets. Glumes subequal (or the lower slightly shorter than the upper), 4-7 mm, mucronate, sometimes with 1 or 2 short lateral teeth; lemmas 5-7 mm, prominently 11-15-veined, apices erose or with a few minute teeth, central vein extending into a prominent mucro as much as 1 mm long; paleas slightly shorter than the lemmas; anthers about 3 mm, yellow, becoming pinkish in drying; lodicules about 0.5 mm, fused to the paleas. Caryopses about 3 mm, laterally compressed, broadly oblong, smooth. 2n = 40.

Discussion

Tuctoria mucronata is known from only two locations in Solano County, California; both locations are at elevations below 10 m.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."/3" is not declared as a valid unit of measurement for this property.

... more about "Tuctoria mucronata"
pinkish +  and yellow +
3 cm30 mm <br />0.03 m <br /> (?) +
with a few minute teeth +  and erose +
John R. Reeder +
(Crampton) Reeder +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
mushroom-button--shaped +
tapering +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
spikelike +
oblong +  and compressed +
3 cm30 mm <br />0.03 m <br /> (?) +
dumbbell--shaped +
Prickly spiralgrass +
branching +  and simple +
geniculate +
0 cm0 mm <br />0 m <br /> (12 cm120 mm <br />0.12 m <br />) +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
5 +  and 10 +
round +  and compressed +
shorter or longer +
subtending +
mucronate +
subequal +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
uncinate +
spicate +  and ebracteate +
paniculate +  and racemose +
cylindrical +  and clavate or capitate +
hollow +  and solid +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not absent +
11-15-veined +
denticulate +  and entire +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
truncate +  and slightly emarginate +
0.5 cm5 mm <br />0.005 m <br /> (?) +
2 +  and 1 +
well-developed +
subequal +  and or slightly shorter +
dry +  and fleshy +
disarticulating +
exserted +  and included +
clavate +
1.5 cm15 mm <br />0.015 m <br /> (6 cm60 mm <br />0.06 m <br />) +
pedicellate +  and sessile +
1 +  and 60 +
compressed +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
filiform +
Gramineae +
Tuctoria mucronata +
Tuctoria +
species +
membranous +
conspicuous +
5 (?) +  and 17 (?) +
aquatic +  and terrestrial +
viscid-aromatic +
dioecious +, monoecious +  and synoecious +