Zea mays subsp. mexicana

(Schrad.) H.H. litis
Common names: Chalco teosinte Central-plateau teosinte Nobogame teosinte
Synonyms: Zea mexicana
Treatment appears in FNA Volume 25. Treatment on page 703.

Culms (0.5) 1-3 m tall, (0.5) 1-2 (3) cm thick, unbranched when growing in corn fields to branched and with staminate inflorescences terminating the many branches when growing in the open. Blades 30-85 cm long, 3-8 cm wide. Pistillate inflorescences 5-8 (10) cm long, 0.6-0.8 cm thick, distichous, with 2 rows of spikelets embedded in the rachis; rachises disarticulating at maturity; fruitcases (6) 9-12 (15), 6-10 mm long, 4-6 mm wide, triangular in side view, with pointed apices. Caryopses concealed in the fruitcases. Staminate panicles with 1-35+ ascending to divergent, somewhat stiff, disarticulating branches; central axes of staminate panicles as slender as the lateral branches. Staminate spikelets (6.6) 7.5-10.5 mm. 2n = 20.

Discussion

Zea mays subsp. mexicana is a weedy taxon, native to upland Mexico. It is most abundant in the Meseta Central of the Mexican neo-volcanic plateau, at elevations of 1700-2500 m. It grows almost entirely in and around cornfields, and readily hybridizes with subsp. mays. The long-day tolerant 'Northern Teosinte' is the result of a series of backcrosses between such hybrids and the northernmost population of subsp. mexicana, 'Nobogame Teosinte'.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."elongated" is not a number."thin" is not a number.

... more about "Zea mays subsp. mexicana"
0.6 cm6 mm <br />0.006 m <br /> (?) +  and 1 cm10 mm <br />0.01 m <br /> (?) +
4mm;6mm +
anatomy +  and kranz +
Hugh H. litis +
(Schrad.) H.H. litis +
1 (?) +  and 3 (?) +
disarticulating +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
non-radiate +  and radiate +
well-developed +
30 cm300 mm <br />0.3 m <br /> (85 cm850 mm <br />0.85 m <br />) +
usually linear +  and lanceolate occasionally ovate +
reduced +
3cm;8cm +
disarticulating +
spikelike +
reduced +
subspherical +  and dorsally compressed +
always much thicker +
Chalco teosinte +, Central-plateau teosinte +  and Nobogame teosinte +
several to many +  and solitary +
purple +  and reddish +
100 cm1,000 mm <br />1 m <br /> (300 cm3,000 mm <br />3 m <br />) +
ascending +  and erect +
7 cm70 mm <br />0.07 m <br /> (600 cm6,000 mm <br />6 m <br />) +
woody +  and succulent +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Ga. +, Va. +, Conn. +, R.I. +, Calif. +, Idaho +, Oreg. +, Wash. +, Ala. +, Ark. +, Colo. +, Iowa +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Mass. +, Md. +, Maine +, Mich. +, Minn. +, Mo. +, Miss. +, Mont. +, N.C. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, Ohio +, Pa. +, Puerto Rico +, S.C. +, Tenn. +, Tex. +, Utah +, Virgin Islands +, Vt. +, Wis. +, W.Va. +, Wyo. +, Ont. +, Que. +, Fla. +, Nebr. +, Ariz. +  and Nev. +
capillary +
sometimes longer +
concealing +
2 +  and 1 +
compressed +  and terete +
5-14(28)-veined +
collapsed and embedded in the rachis +  and shallow +
stiff +  and flexible +
shorter or longer +
subtending +
reduced +
membranous +  and chartaceous +
uncinate +
pedunculate +  and multiple-stalked +
5cm +  and 8cm +
bisexual +  and unisexual +
0.6cm +  and 0.8cm +
solid +  and hollow +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.82 cm8.2 mm <br />0.0082 m <br />) +
not disarticulating +
distichous +  and more or less polystichous +
photosynthetic +
not aromatic +
coriaceous +
membranous +
inconspicuous +
complex +  and simple +
concealed +  and prominent +
sessile-pedicellate +  and subsessile +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
fused +  and free +
dry +  and fleshy +
disarticulating +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
triangular +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
bladeless +  and open +
pedunculate +  and pistillate +
polystichous +
4 cm40 mm <br />0.04 m <br /> (?) +  and 30 cm300 mm <br />0.3 m <br /> (?) +
1 cm10 mm <br />0.01 m <br /> (?) +  and 10 cm100 mm <br />0.1 m <br /> (?) +
0.9 cm9 mm <br />0.009 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
sterile +  and bisexual +
usually smaller +  and reduced +
0.75 cm7.5 mm <br />0.0075 m <br /> (1.05 cm10.5 mm <br />0.0105 m <br />) +
2.5mm +  and 5mm +
1 (?) +  and 3 (?) +
fused +  and free +
filamentous +
dome--shaped +  and triangular +
Zea mexicana +
exposed +  and concealed +
Zea mays subsp. mexicana +
Zea mays +
subspecies +
membranous +
sessile-pedicellate +
aquatic +  and terrestrial +