Cymbopogon jwarancusa

(Jones) Schult.
Common names: Iwarancusa grass
Treatment appears in FNA Volume 25. Treatment on page 665.

Plants perennial. Culms to 150 cm, erect or geniculate; nodes often swollen. Basal sheaths glabrous, smooth, whitish-green; ligules 2-6 mm, truncate to acute; blades to 30 cm long, 1.5-4 mm wide, whitish. Inflorescences 15-40 cm, erect; rames 1322 mm; internodes and pedicels densely pilose on the margins and dorsal surface. Sessile spikelets of heterogamous pairs 4.5-5.5 mm; lower glumes lanceolate, shallowly concave distally, sharply keeled, keels not winged; upper lemmas awned, awns 7-10 mm. Pedicellate spikelets about 6 mm. 2n = 20.

Discussion

Cymbopogon jwarancusa is native to Asia, where it is grown for perfume and as a medicine for fevers. It is grown as an ornamental in the United States, and may persist for a considerable time after planting in the warmest parts of the Flora region.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Cymbopogon jwarancusa"
filiform +
anatomy +  and kranz +
Mary E. Barkworth +
(Jones) Schult. +
1 (?) +  and 3 (?) +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
slender +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
flattened +
swelling +
pseudopetiolate +
non-radiate +  and radiate +
well-developed +
0 cm0 mm <br />0 m <br /> (30 cm300 mm <br />0.3 m <br />) +
mostly +  and glabrous +
usually linear +  and lanceolate occasionally ovate +
reduced +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
spikelike +
Iwarancusa grass +
purple +  and reddish +
geniculate +
0 cm0 mm <br />0 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
not woody +
capillary +
sometimes longer +
concealing +
compressed +  and terete +
shorter or longer +
subtending +
compressed +  and rounded +
unequal +
uncinate +
bracteate +  and ebracteate +
pedunculate +  and multiple-stalked +
1,322 cm13,220 mm <br />13.22 m <br /> (15 cm150 mm <br />0.15 m <br />) +
solid +  and hollow +
photosynthetic +
smelling +  and aromatic +
coriaceous +
truncate +  and acute +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
membranous +
inconspicuous +
keeled +, concave +  and lanceolate +
complex +  and simple +
concealed +  and prominent +
swollen +
pedicellate +
free +  and fused +
dry +  and fleshy +
elongate +
pedicellate +  and sessile +
in triplets +  and paired +
well-developed +
1 +, 4 +  and 7 +
homogamous +  and heterogamous +
compressed +
usually smaller +  and reduced +
6 cm60 mm <br />0.06 m <br /> (?) +
heterogamous +  and homogamous +
1 +  and 3 +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Gramineae +
Cymbopogon jwarancusa +
Cymbopogon +
species +
membranous +
sessile-pedicellate +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +