Agave ×glomeruliflora

(Engelmann) A. Berger

Agaven, 95. 1915.

Common names: Chisos agave
Basionyms: Agave heteracantha Zuccarini forma glomeruliflora Engelmann Gard. Chron., n. s. 19: 48, fig. 6. 1883
Synonyms: Agave chisosensis C. H. Muller
Treatment appears in FNA Volume 26.

Plants acaulescent, frequently suckering; rosettes cespitose, 4–6 × 5–9 dm. Leaves mostly spreading; blade light to dark green, without budprints, linear and 40–55 × 5–6 cm or lanceolate to deltate and 35–50 × (5–) 7–10 (–12.5) cm, rigid, adaxially concave toward apex, abaxially convex toward base; margins straight, nonfiliferous, conspicuously armed, teeth single, 3–10 (–15) mm, 1–3 cm apart; apical spine grayish, conical to subulate, 2.5–4.5 cm. Scape 4–6 m. Inflorescences subspicate to narrowly racemose-paniculate, sparsely flowered; bracts persistent, triangular to narrowly triangular, 1–4 cm; lateral branches 70–90+, comprising distal 1/3–1/2 of inflorescence, 10 cm or shorter. Flowers (6–) 10–12 per cluster, erect, 4–4.7 cm; perianth yellow to yellowish lime green, tube funnelform, (3.2–) 6–8 × 10–13 mm, limb lobes ascending, subequal, 16–23 mm; stamens long-exserted; filaments inserted on rim of perianth-tube, spreading, yellow to lime green or maroon, 4–5.8 cm; anthers yellow, 20–21 mm; ovary 1.3–2 (–2.2) cm, neck constricted, 3.5–6 mm. Capsules sessile or short-pedicellate, oblong, 2.5–4 cm, apex beaked. Seeds 5–6 mm.


Phenology: Flowering mid spring–early fall.
Habitat: Gravelly calcareous slopes in grasslands and oak-juniper woodlands
Elevation: 600–1600 m

Discussion

as species

Of conservation concern.

H. S. Gentry (1982) applied Agave ×glomeruliflora to a series of hybrids involving A. lechuguilla (subg. Littaea) and A. gracilipes, A. havardiana, and A. parryi var. neomexicana (subg. Agave), representing “all those cases of the racemose inflorescence seconded by the loose corneous margins of leaves intermediate in width between the wide leaves of the above cited species and A. lechuguilla.” However, A. ×glomeruliflora should probably be more appropriately applied only to crosses and back-crosses between A. lechuguilla and A. havardiana.

Unlike species of subg. Littaea, this hybrid (and others that result from intersubgeneric crosses) exhibits the more open inflorescence types of subg. Agave in that the scape is dominated by clusters of flowers on more or less well-defined lateral branches.

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 ×glomeruliflora"
longitudinal +
2 cm20 mm <br />0.02 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
width +  and length +
glandular-pubescent +  and glandular +
papillate +
conical +  and subulate +
2.5 cm25 mm <br />0.025 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
James L. Reveal +  and Wendy C. Hodgson +
(Engelmann) A. Berger +
Agave heteracantha +
armed +  and filiferous +
10 cm100 mm <br />0.1 m <br /> (12.5 cm125 mm <br />0.125 m <br />) +
light +  and dark green +
35 cm350 mm <br />0.35 m <br /> (50 cm500 mm <br />0.5 m <br />) +
convex +  and concave +
short to long +
7cm +  and 10cm +
persistent +
reflexed +, erect +  and ascending +
triangular +  and narrowly triangular +
umbel-like +
short-pedicellate +  and sessile +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Chisos agave +
fibrous-rooted +
Tex. +  and n Mexico +
600–1600 m +
pubescent +  and glabrous +
recurved +  and erect +
loculicidal +
oblong +  and ovoid +
Gravelly calcareous slopes in grasslands and oak-juniper woodlands +
subspicate +  and narrowly racemose-paniculate +
1/3 +  and 1/2 +
10 cm100 mm <br />0.1 m <br /> (?) +
pseudopetiolate +, sessile +  and simple +
evergreen +
1.6 cm16 mm <br />0.016 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
armed +  and nonfiliferous +
dentate +, serrulate +  and entire +
Fleshy (?) +, Firm (?) +  and Rigid (?) +
constricted +
0.35 cm3.5 mm <br />0.0035 m <br /> (?) +  and 0.6 cm6 mm <br />0.006 m <br /> (?) +
2 cm20 mm <br />0.02 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
cylindrical +, ovoid +  and 3-angled +
1.3 cm13 mm <br />0.013 m <br /> (?) +  and 2 cm20 mm <br />0.02 m <br /> (?) +
succulent +
not +  and articulate +
umbel-like +
yellow +  and lime green or maroon +
4 cm40 mm <br />0.04 m <br /> (5.8 cm58 mm <br />0.058 m <br />) +
semisucculent +
Flowering mid spring–early fall. +
400 cm4,000 mm <br />4 m <br /> (600 cm6,000 mm <br />6 m <br />) +
globose +, obovoid +  and flattened +
semiwoody +
long-exserted +
branched +, , +  and unbranched +
aboveground +
3 +  and 1 +
papillate +
exserted +  and included +
subulate +
Agave chisosensis +
Agave ×glomeruliflora +
species +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
10mm;13mm +
plant +  and suckering +
polycarpic +  and monocarpic +
small;gigantic +
petal-like +