Willkommia

Hack.
Treatment appears in FNA Volume 25. Treatment on page 227.
 TaxonIllustrator 
FNA25 P88B Willkommia pg 229.jpegWillkommia texanaKaren Klitz
Linda A. Vorobik

Plants annual or perennial; cespitose or tufted, often stoloniferous. Culms 12-80 cm, herbaceous, unbranched distally. Leaves involute to flat; ligules membranous, ciliate. Inflorescences terminal, panicles of several, racemosely arranged, spikelike branches, mostly exceeding the leaves, lower branches sometimes partially included in the upper leaf-sheaths at maturity; branches not woody, unilateral, with 2 rows of appressed, imbricate, solitary spikelets, terminating in a rudimentary, sterile spikelet, sterile spikelets sometimes consisting of 1 or 2 small scales. Spikelets dorsally compressed, with 1 floret; disarticulation below the glumes. Lower glumes to 2/3 as long as the spikelets, veinless; upper glumes equaling the florets, 1-veined; calluses acute to pointed; lemmas thinly membranous, 3-veined, apices rounded to acute, mucronate, shortly awned, or unawned. Caryopses ellipsoid, x = 10.

Discussion

Willkommia is a genus of four species, three native to southern tropical Africa and one to the Americas, including the Flora region.

Selected References

None.

Lower Taxa

"decumbent" is not a number.

... more about "Willkommia"
1 +  and 3 +
mucronate +, rounded +  and acute +
J.K. Wipff +
1 (?) +  and 3 (?) +
multiple +, , +  and single +
keeled +  and rounded +
pseudopetiolate +  and branching +
not fused +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
not pseudopetiolate +
pubescent +  and glabrous +
usually linear +  and lanceolate occasionally ovate +
spikelike +
not woody +
acute +  and pointed +
triangular +  and dome--shaped +
sometimes longer +
membranous +
ascending +  and erect +
12 cm120 mm <br />0.12 m <br /> (80 cm800 mm <br />0.8 m <br />) +
not woody +
Okla. +  and Tex. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
bisexual +  and fertile +
round +  and compressed +
reduced +
shorter or longer +
subtending +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
not absent +
involute +  and flat +
membranous +
sometimes longer +
membranous +
inconspicuous +
concealed +  and prominent +
2 +  and 1 +
dry +  and fleshy +
spikelike +
1 +  and 60 +
compressed +
1 +  and 3 +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Willkommia +
Poaceae tribe Cynodonteae +
membranous +
7 (?) +  and 13 (?) +
perennial +  and annual +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +