Cathestecum

J. Presl
Treatment appears in FNA Volume 25. Treatment on page 272.

Plants annual or perennial; monoecious or dioecious; often stoloniferous. Culms 5-40 cm, sometimes decumbent. Leaves mostly basal; sheaths open; ligules of hairs; blades 0.5-2 mm wide. Inflorescences terminal, racemelike panicles of short branches, usually exceeding the upper leaves, sometimes appearing 1-sided; branches about 0.5 cm, not appressed to the rachises, with 3 spikelets, bases strongly curved, shortly strigose, axes not extending beyond the distal spikelets; disarticulation at the base of the branches. Spikelets pedicellate or sessile, lateral spikelets with shorter pedicels than the central spikelet or sessile; lateral spikelets with 2 florets, lower florets usually staminate or sterile, rarely pistillate, upper florets much reduced, usually sterile; central spikelets pedicellate, with 3 florets, lowest florets bisexual or pistillate (staminate in staminate plants), distal florets staminate or sterile. Glumes 2, very unequal, shorter than the spikelets, unawned; lower glumes shorter than the upper glumes, those of the central spikelets flabellate, glabrous, veinless; upper glumes approximately equal to the adjacent lemmas, 1-veined, acuminate; lemmas thinner than the glumes, pilose, 3-veined, 4-lobed, all 3 veins excurrent, forming awns that equal or exceed the lobes, lobes of the sterile florets usually deeper than those of the other florets; paleas 2-veined, veins often extending as awns, x = 10.

Discussion

Cathestecum is a genus of six species that extends from the southern United States to Guatemala; two are native to the Flora region. Columbus (1999) advocated including Cathestecum in Bouteloua, but the traditional treatment is adopted here.

Key

1 Stolon internodes to 12 cm long, straight or almost so; culms 5-15 cm tall; spikelets frequently reddish or purplish; lateral spikelets of branches with bisexual florets poorly-developed, sterile (rarely staminate) florets; central spikelet on staminate branches with sparsely pilose lemmas Cathestecum brevifolium
1 Stolon internodes usually 15 cm or longer, strongly arching; culms 10-30 cm tall; spikelets frequently pale green; lateral spikelets of branches with bisexual florets usually well-developed, usually staminate or sterile; central spikelet on staminate branches with glabrous lemmas Cathestecum erectum

"decumbent" is not a number.

... more about "Cathestecum"
1 +  and 3 +
Mary E. Barkworth +
J. Presl +
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 +
0.5mm;2mm +
spikelike +
triangular +  and dome--shaped +
sometimes longer +
membranous +
ascending +  and erect +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
not woody +
Ariz. +  and Tex. +
not waisted +
capillary +
pistillate +  and staminate +
sometimes longer +
3 +  and 2 +
round +  and compressed +
reduced +
shorter or longer +
subtending +
unequal +
uncinate +
paniculate +  and racemose +
hollow +  and solid +
not absent +
4-lobed +
thinner +
sometimes longer +
inconspicuous +
pistillate +  and staminate +
concealed +  and prominent +
2 +  and 1 +
racemelike +
dry +  and fleshy +
spikelike +
beetle1987a +, columbus1999a +  and pierce1979a +
sessile +  and pedicellate +
compressed +
1 (?) +  and 3 (?) +
compound +  and simple +
2 (?) +  and 3 (?) +
Gramineae +
Cathestecum +
Poaceae tribe Cynodonteae +
membranous +
7 +  and 13 +
perennial +  and annual +
aquatic +  and terrestrial +
dioecious +  and monoecious +