Agave gracilipes

Trelease

Rep. (Annual) Missouri Bot. Gard. 22: 95, plates 98, 99. 1912.

Common names: Slim-footed agave
Treatment appears in FNA Volume 26. Treatment on page 458. Mentioned on page 443, 445, 450.

Plants acaulescent, sparsely suckering; rosettes usually solitary, 3–4 × 7–8 dm, dense. Leaves ascending, 18–30 × 4.5–7 cm; blade glaucous and yellow or gray-green, not cross-zoned, lanceolate to broadly lanceolate, rigid, adaxially concave toward apex, abaxially convex; margins straight, armed, teeth single, well defined, 2–8 mm, 1.5–2.5 cm apart; apical spine reddish-brown to gray, acicular, 2.5–5 cm. Scape (1.8–) 4–5 m. Inflorescences narrowly to somewhat broadly paniculate, dense, not bulbiferous; bracts persistent, lanceolate, 1–3 (–5) cm; lateral branches 30–40, slightly ascending, comprising distal 1/3–1/2 of inflorescence, longer than 10 cm, or short-scaped individuals (1.8–3.5 m) with only 7–20 lateral branches on distal 1/4. Flowers 6–45 per cluster, erect, 4–5.5 (–5.8) cm; perianth red in bud, yellow to yellow-green at anthesis, tube broadly campanulate, 4–7 × 9–15 mm, limb lobes spreading to ascending, slightly unequal, 14–18 mm; stamens long-exserted; filaments inserted just below rim of perianth-tube, erect, yellow, (2.8–) 3–4.5 cm; anthers yellow, 16–20 mm; ovary 2.5–3.2 cm, neck constricted, 3–5 mm. Capsules sessile or short-pedicellate, oblong, 2.7–4.4 cm, apex beaked. Seeds 5–6.5 mm. 2n = 60.


Phenology: Flowering summer–early fall.
Habitat: Gravelly to rocky, often calcareous places in grasslands, desert scrub, and pinyon juniper woodlands
Elevation: 1200–1900 m

Distribution

V26 956-distribution-map.jpg

N.Mex., Tex., Mexico (Chihuahua)

Discussion

Agave gracilipes probably represents an ancient hybrid involving A. lechuguilla and A. parryi subsp. neomexicana. In fact, hybrids between A. gracilipes and A. lechuguilla appear to occur at present. However, until populations of A. gracilipes are thoroughly studied cytologically, we are reluctant to designate this taxon as a hybrid species (e.g., see 8. A. ×arizonica).

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 gracilipes"
longitudinal +
1.6 cm16 mm <br />0.016 m <br /> (2 cm20 mm <br />0.02 m <br />) +
width +  and length +
glandular-pubescent +  and glandular +
papillate +
reddish-brown +  and gray +
2.5 cm25 mm <br />0.025 m <br /> (5 cm50 mm <br />0.05 m <br />) +
James L. Reveal +  and Wendy C. Hodgson +
Trelease +
armed +  and filiferous +
not cross-zoned +, gray-green +  and yellow +
convex +, concave +, lanceolate +  and broadly lanceolate +
short to long +
thick +  and thin +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
persistent +
reflexed +, erect +  and ascending +
lanceolate +
umbel-like +
short-pedicellate +  and sessile +
2.7 cm27 mm <br />0.027 m <br /> (4.4 cm44 mm <br />0.044 m <br />) +
Slim-footed agave +
fibrous-rooted +
N.Mex. +, Tex. +  and Mexico (Chihuahua) +
1200–1900 m +
2.8 cm28 mm <br />0.028 m <br /> (3 cm30 mm <br />0.03 m <br />) +
pubescent +  and glabrous +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
recurved +  and erect +
loculicidal +
oblong +  and ovoid +
Gravelly to rocky, often calcareous places in grasslands, desert scrub, and pinyon juniper woodlands +
1/3 +  and 1/2 +
10 cm100 mm <br />0.1 m <br /> (?) +
pseudopetiolate +, sessile +  and simple +
evergreen +
18cm;30cm +
4.5 cm45 mm <br />0.045 m <br /> (7 cm70 mm <br />0.07 m <br />) +
spreading +  and ascending +
1.4 cm14 mm <br />0.014 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
dentate +, serrulate +  and entire +
Fleshy (?) +, Firm (?) +  and Rigid (?) +
constricted +
0.3 cm3 mm <br />0.003 m <br /> (?) +  and 0.5 cm5 mm <br />0.005 m <br /> (?) +
cylindrical +, ovoid +  and 3-angled +
2.5 cm25 mm <br />0.025 m <br /> (?) +  and 3.2 cm32 mm <br />0.032 m <br /> (?) +
succulent +
not +  and articulate +
umbel-like +
semisucculent +
Flowering summer–early fall. +
Rep. (Annual) Missouri Bot. Gard. +
180 cm1,800 mm <br />1.8 m <br /> (400 cm4,000 mm <br />4 m <br />) +
400 cm4,000 mm <br />4 m <br /> (500 cm5,000 mm <br />5 m <br />) +
globose +, obovoid +  and flattened +
semiwoody +
long-exserted +
branched +, , +  and unbranched +
aboveground +
3 +  and 1 +
papillate +
exserted +  and included +
subulate +
Agave gracilipes +
species +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
campanulate +
9mm;15mm +
plant +  and suckering +
polycarpic +  and monocarpic +
small;gigantic +
petal-like +