Triraphis mollis

R. Br.
Common names: Purple needlegrass
Introduced
Treatment appears in FNA Volume 25. Treatment on page 31.

Plants short-lived perennials. Culms 2-90 cm, sometimes rooting at the nodes; nodes glabrous. Ligules membranous, long-ciliate, central cilia 0.5-1.6 mm, those at the sides to 3 mm, stiff; blades 7-24 cm long, 2-5 mm wide, usually involute, rarely flat. Panicles 6-30 cm long, 1.5-3 cm wide; primary branches to 4.5 cm, appressed or ascending. Lower glumes 3-4 mm, mucronate; upper glumes 4-5 mm, 2-toothed; calluses about 0.5 mm, with hairs; lemmas 3-5 mm, hairs on the veins to 2 mm, lobes about 1 mm, central awns 5-7 mm, lateral awns 6-7 mm. 2n = unknown.

Discussion

Triraphis mollis usually flowers in response to rain. It is common on sandy soils in New South Wales, Australia. In the Flora region it is currently known only from Dimmit County, Texas, but it will probably spread.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Triraphis mollis"
J.K. Wipff +
R. Br. +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
7 cm70 mm <br />0.07 m <br /> (24 cm240 mm <br />0.24 m <br />) +
pubescent +  and glabrous +
usually linear +  and lanceolate occasionally ovate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
spikelike +
0.5 cm5 mm <br />0.005 m <br /> (?) +
triangular +  and dome--shaped +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
sometimes longer +
membranous +
Purple needlegrass +
geniculate +
2 cm20 mm <br />0.02 m <br /> (90 cm900 mm <br />0.9 m <br />) +
not woody +
Mass. +  and Tex. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
3 +  and 9 +
round +  and compressed +
reduced +
shorter or longer +
subtending +
subequal +
uncinate +
simple +, contracted +  and open +
paniculate +  and racemose +
hollow +  and solid +
ciliate +  and pilose +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
not absent +
toothed +  and 3-4-lobed +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
sometimes longer +
membranous +
inconspicuous +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
pubescent +  and glabrous +
concealed +  and prominent +
2 +  and 1 +
6cm +  and 30cm +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
dry +  and fleshy +
ascending;appressed +
0 cm0 mm <br />0 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
spikelike +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Introduced +
1 +  and 60 +
compressed +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Triraphis mollis +
Triraphis +
species +
membranous +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
7 (?) +  and 13 (?) +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
perennial +  and short-lived +
perennial +  and annual +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +