Agave univittata

Haworth

Philos. Mag. Ann. Chem. 10: 415. 1831.

Common names: Thorn-crested agave
Synonyms: Agave heteracantha Zuccarini Agave lophantha Schiede ex Kunth
Treatment appears in FNA Volume 26. Treatment on page 449. Mentioned on page 444.

Plants acaulescent, usually suckering; rosettes densely cespitose, 3–6 × 5–10 dm. Leaves mostly erect, 30–40 (–70) × 3–4.5 (–5) cm; blade light green to yellowish green, without budprints, linearlanceolate, stiff, adaxially plane to concave toward apex, abaxially convex toward base; margins undulate to crenate, nonfiliferous, not easily detached, conspicuously armed, teeth single or occasionally double, 4–6 (–8) mm, 1–2 cm apart; apical spine reddish to grayish, subulate, 1–1.5 (–2) cm. Scape 3–4.5 (–5) m. Inflorescences spicate, densely flowered on distal 1/2; bracts caducous, acicular, 3–5 cm; peduncle 4 cm or shorter. Flowers 1 on short pedicel, or 2–7 per cluster, erect, 3.5–4 (–4.5) cm; perianth greenish white to yellowish green, tube campanulate, 2–4 × 8–10 mm, limb lobes erect to slightly spreading, subequal, 14–20 mm; stamens long-exserted; filaments inserted on rim of perianth-tube, spreading, greenish or lavender, 3–4.5 cm; anthers pale-yellow, 15–20 mm; ovary 1.8–2.2 cm, neck constricted 5–7 mm. Capsules sessile or short-pedicellate, oblong and 1.8–2.5 cm or globose and 1.5–2 cm, apex beaked. Seeds 5–6 mm. 2n = 60.


Phenology: Flowering spring.
Habitat: Sandy flats
Elevation: 0–100 m

Discussion

The name Agave lophantha was mentioned by C. J. W. Schiede (Linnaea 4: 582. 1829) without a description. C. S. Kunth (Enum. Pl. 5: 838. 1850) validated the name, but not before A. univittata was proposed. Neither name is typified nor is any authentic material known. H. S. Gentry (1982) incorrectly retained A. lophantha and it is now widely used. A. J. Breitung (1959) was the first to adopt A. univittata, and that name is taken up here.

Selected References

None.

Lower Taxa

None.

"broadened" is not a number."dm" is not declared as a valid unit of measurement for this property.

... more about "Agave univittata"
pale-yellow +
longitudinal +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
width +  and length +
glandular-pubescent +  and glandular +
papillate +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
reddish +  and grayish +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
James L. Reveal +  and Wendy C. Hodgson +
Haworth +
armed +  and filiferous +
light green +  and yellowish green +
convex +, adaxially plane +  and concave +
short to long +
? (?) +, ? (?) +  and Rigid (?) +
thick +  and thin +
reflexed +, erect +  and ascending +
acicular +
umbel-like +
short-pedicellate +  and sessile +
globose +  and oblong +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Thorn-crested agave +
fibrous-rooted +
Tex. +  and Mexico +
0–100 m +
pubescent +  and glabrous +
recurved +  and erect +
loculicidal +
oblong +  and ovoid +
Sandy flats +
flowered +  and spicate +
paniculate +  and racemose +
pseudopetiolate +, sessile +  and simple +
40 cm400 mm <br />0.4 m <br /> (70 cm700 mm <br />0.7 m <br />) +
4.5 cm45 mm <br />0.045 m <br /> (5 cm50 mm <br />0.05 m <br />) +
evergreen +
30cm;40cm +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
erect +  and slightly spreading +
1.4 cm14 mm <br />0.014 m <br /> (2 cm20 mm <br />0.02 m <br />) +
armed +  and nonfiliferous +
dentate +, serrulate +  and entire +
undulate +  and crenate +
Fleshy (?) +, Firm (?) +  and Rigid (?) +
constricted +
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 0.7 cm7 mm <br />0.007 m <br /> (?) +
cylindrical +, ovoid +  and 3-angled +
1.8 cm18 mm <br />0.018 m <br /> (?) +  and 2.2 cm22 mm <br />0.022 m <br /> (?) +
succulent +
not +  and articulate +
umbel-like +
4 cm40 mm <br />0.04 m <br /> (?) +
lavender +  and greenish +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
semisucculent +
Flowering spring. +
Philos. Mag. Ann. Chem. +
450 cm4,500 mm <br />4.5 m <br /> (500 cm5,000 mm <br />5 m <br />) +
300 cm3,000 mm <br />3 m <br /> (450 cm4,500 mm <br />4.5 m <br />) +
globose +, obovoid +  and flattened +
semiwoody +
long-exserted +
branched +, , +  and unbranched +
aboveground +
3 +  and 1 +
papillate +
exserted +  and included +
subulate +
Agave heteracantha +  and Agave lophantha +
Agave univittata +
species +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
occasionally +  and single +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
campanulate +
8mm;10mm +
plant +  and suckering +
polycarpic +  and monocarpic +
small;gigantic +
petal-like +