Agave ×arizonica

Gentry & J. H. Weber

Cact. Succ. J. (Los Angeles) 42: 223, figs. 1, 2. 1970.

Common names: Arizona agave
Treatment appears in FNA Volume 26.

Plants acaulescent, sparingly suckering; rosettes solitary or sparingly cespitose, 2–3.5 × 3–4 dm. Leaves spreading, 13–31 × 2–3.2 cm; blade dark green, without budprints, linearlanceolate, rigid, adaxially slightly concave toward apex, abaxially convex toward base; margins straight, nonfiliferous, conspicuously armed, horny from below midblade to apical spine, teeth single, (1–) 2–5 mm, 1–3 (–5) cm apart; apical spine dark-brown to gray, subulate, 1–2.5 cm. Scape 2.5–4 m. Inflorescences subspicate to racemose-paniculate, openly flowered; bracts caducous, triangular, 8–12 cm; lateral branches 30–40, comprising distal 1/4–1/3 of inflorescence, 4 cm or shorter. Flowers 10–20 per cluster, erect, cylindric-urceolate, 2.5–3.5 cm; perianth pale-yellow, sometimes fused with red, tube campanulate, 3.5–7.5 × 8–9 mm, limb lobes not connivent, erect to ascending, subequal, 8–11 mm; stamens long-exserted; filaments inserted 4 mm above base of perianth-tube, erect, light yellow, 1.6–3 cm; anthers pale-yellow to yellow, 7–11 mm; ovary 0.8–1.5 cm, neck constricted, 4–6 mm. Capsules short-pedicellate, ellipsoid to obovoid, 1.5–2.2 cm, apex beaked. Seeds 3–4.5 mm. 2n = 60.


Phenology: Flowering mid spring–early summer.
Habitat: Rocky slopes in chaparral and juniper-dominated grasslands
Elevation: 900–1800 m

Discussion

as species

Of conservation concern.

Agave ×arizonica is a hybrid population involving A. chrysantha and A. toumeyana var. bella. Only about 60 clones are known.

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 ×arizonica"
pale-yellow +  and yellow +
longitudinal +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
width +  and length +
glandular-pubescent +  and glandular +
papillate +
dark-brown +  and gray +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
James L. Reveal +  and Wendy C. Hodgson +
Gentry & J. H. Weber +
armed +  and filiferous +
convex +  and concave +
short to long +
thick +  and thin +
reflexed +, erect +  and ascending +
triangular +
umbel-like +
short-pedicellate +
ellipsoid +  and obovoid +
1.5 cm15 mm <br />0.015 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
Arizona agave +
fibrous-rooted +
900–1800 m +
pubescent +  and glabrous +
1.6 cm16 mm <br />0.016 m <br /> (3 cm30 mm <br />0.03 m <br />) +
recurved +  and erect +
loculicidal +
oblong +  and ovoid +
Rocky slopes in chaparral and juniper-dominated grasslands +
subspicate +  and racemose-paniculate +
1/4 +  and 1/3 +
4 cm40 mm <br />0.04 m <br /> (?) +
pseudopetiolate +, sessile +  and simple +
evergreen +
13cm;31cm +
2 cm20 mm <br />0.02 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
erect +  and ascending +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
horny +, armed +  and nonfiliferous +
dentate +, serrulate +  and entire +
Fleshy (?) +, Firm (?) +  and Rigid (?) +
constricted +
0.4 cm4 mm <br />0.004 m <br /> (?) +  and 0.6 cm6 mm <br />0.006 m <br /> (?) +
cylindrical +, ovoid +  and 3-angled +
0.8 cm8 mm <br />0.008 m <br /> (?) +  and 1.5 cm15 mm <br />0.015 m <br /> (?) +
succulent +
not +  and articulate +
umbel-like +
semisucculent +
Flowering mid spring–early summer. +
Cact. Succ. J. (Los Angeles) +
cespitose +  and solitary +
250 cm2,500 mm <br />2.5 m <br /> (400 cm4,000 mm <br />4 m <br />) +
globose +, obovoid +  and flattened +
semiwoody +
long-exserted +
branched +, , +  and unbranched +
aboveground +
3 +  and 1 +
papillate +
exserted +  and included +
subulate +
Agave ×arizonica +
species +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
campanulate +
8mm;9mm +
plant +  and suckering +
polycarpic +  and monocarpic +
small;gigantic +
petal-like +