Zizania texana

Hitchc.
Common names: Texas wildrice
Endemic
Treatment appears in FNA Volume 24. Treatment on page 50.
Please click on the illustration for a higher resolution version.
Illustrator: Sandy Long

Copyright: Utah State University

Plants perennial; stoloniferous. Culms 1-2 (5) m, decumbent, geniculate, floating or the distal portions emergent. Sheaths glabrous; ligules 4-12 mm, upper ligules caudate or acuminate; blades to 1 m long and 13 (25) mm wide, glabrous. Panicles 16-31 cm long, 1-10 cm wide; branches unisexual. Staminate branches ascending or somewhat divergent; pedicel apices about 3 mm wide. Staminate spikelets 6.5-11 mm, ovate or oblong, acute to acuminate. Pistillate branches appressed or ascending; pedicel apices 0.5-0.9 mm wide. Pistillate spikelets 9-12.5 mm long, 1.2-1.8 mm wide, lanceolate, somewhat coriaceous, somewhat lustrous, with scattered short hairs, apices scabrous or hispidulous, awned, awns 9-35 mm; aborted pistillate spikelets 0.7-1.5 mm wide. Caryopses 4.3-7.6 mm long, 1-1.5 mm wide. 2n = 30.

Discussion

Zizania texana grows only in the headwaters of the San Marcos River, in San Marcos, Texas (Terrell et al. 1978). It is officially listed as an endangered species in the United States.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Zizania texana"
hispidulous +  and scabrous +
acute +  and acuminate +
Edward E. Terrell +
Hitchc. +
1 (?) +  and 3 (?) +
scabridulous +
slender +
0.9 cm9 mm <br />0.009 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.7mm;1.5mm +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
0 cm0 mm <br />0 m <br /> (100 cm1,000 mm <br />1 m <br />) +
not evident +
13 cm130 mm <br />0.13 m <br /> (25 cm250 mm <br />0.25 m <br />) +
pistillate +  and staminate +
ascending;appressed;ascending +
spikelike +
Texas wildrice +
aerenchymatous +
20 cm200 mm <br />0.2 m <br /> (500 cm5,000 mm <br />5 m <br />) +
geniculate +
100 cm1,000 mm <br />1 m <br /> (200 cm2,000 mm <br />2 m <br />) +
0 +  and 1/3 +
capillary +
sometimes longer +
sterile +, fertile +, sexual +, unisexual +  and bisexual +
round +  and compressed +
cylindrical +, oblong +  and ovoid +
subtending +
reduced +
uncinate +
solid +  and hollow +
aerenchymatous +
distributed +
coriaceous +, chartaceous +  and membranous +
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
scarious +  and membranous +
annular +
inconspicuous +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
well-developed +
1-keeled +
membranous +
16cm +  and 31cm +
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
dry +  and fleshy +
not prolonged +
not inflated +
pistillate +  and staminate +
0.9 cm9 mm <br />0.009 m <br /> (1.25 cm12.5 mm <br />0.0125 m <br />) +
[9/10] +, /2 +  and 1 +
lanceolate +, oblong acute +  and acuminate +
0.65 cm6.5 mm <br />0.0065 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
1.2mm +  and 1.8mm +
1 +  and 3 +
simple +  and compound +
2 (?) +  and 3 (?) +
triangular +  and dome--shaped +
Gramineae +
Zizania texana +
species +
membranous +