Dasylirion leiophyllum

Engelmann ex Trelease

Proc. Amer. Philos. Soc. 50: 433, fig. 1911.

Synonyms: Dasylirion heteracanthum I. M. Johnston
Treatment appears in FNA Volume 26. Treatment on page 423. Mentioned on page 422.

Plants typically large and robust, with small crowns; trunks to 1 m, erect or reclining. Leaves elongate, rigid; blade bright green, 90–110 × (1.5–) 2–3 cm wide above broadened base, usually smooth and shiny, glabrous, not waxy; prickles mostly retrorse. Inflorescences 2.5–5 m; stalk 3–5 cm diam. at base; branches mostly basal, erect, 4–10 cm; bracts lanceolate; fascicles of flowers condensed, 8–12 cm from base to tip; primary-axes 2–5 cm. Flowers with receptacles 0.2–0.4 mm; tepals whitish or greenish, 1.8–2 × 1 mm; style 0.2–0.3 mm; stigma lobes 0.3–0.4 mm; pedicel 2–2.4 mm in fruit. Capsules ellipsoid to obovoid, 6–7 × 4–4.5 mm; distal wing lobes 1.5–2 mm, rounded in cross-section, not indented.


Phenology: Flowering mainly Jun–Jul.
Habitat: Gravelly limestone and igneous slopes, bajadas, canyons, and arroyos of mountains
Elevation: 1200–1800 m

Distribution

V26 869-distribution-map.jpg

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

Discussion

Dasylirion leiophyllum hybridizes with D. texanum in the area of overlap. Specimens with mixed prickle curvature have been treated as D. heteracanthum, but on the whole these resemble D. leiophyllum, and so D. heteracanthum is reduced to synonomy here.

Selected References

None.

Lower Taxa

None.

"broadened" is not a number.

... more about "Dasylirion leiophyllum"
longitudinal +
glandular-pubescent +  and glandular +
David J. Bogler +
Engelmann ex Trelease +
overlapping +
spoon--shaped +
expanded +
broadened +
bright green +
waxy-glaucous +  and glabrous +
elliptic +, ovate +, oblanceolate +, lanceolate +  and linear +
2cm +  and 3cm +
stramineous +
reflexed +, erect +  and ascending +
lanceolate +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
ellipsoid +  and obovoid +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
N.Mex. +, Tex. +, Mexico (Chihuahua) +  and Mexico (Coahuila) +
1200–1800 m +
pubescent +  and glabrous +
female +, male +  and unisexual +
3-winged +  and capsular +
indehiscent +
fleshy +  and dry +
Gravelly limestone and igneous slopes, bajadas, canyons, and arroyos of mountains +
racemose +  and paniculate +
250 cm2,500 mm <br />2.5 m <br /> (?) +  and 500 cm5,000 mm <br />5 m <br /> (?) +
pseudopetiolate +, sessile +  and simple +
persistent +
elongate +
connate +
dentate +, serrulate +  and entire +
denticulate +
3-angled +
not +  and articulate +
0.2 cm2 mm <br />0.002 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
semisucculent +
Flowering mainly Jun–Jul. +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Proc. Amer. Philos. Soc. +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
turbinate +  and 3-angled +
exserted +  and included +
rudimentary +
aboveground +  and subterranean +
elongate +
0.3mm +  and 0.4mm +
3 +  and 1 +
exserted +  and included +
strap--shaped +
expanded +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Dasylirion heteracanthum +
Dasylirion leiophyllum +
Dasylirion +
species +
greenish;whitish +
distinct +
1.8mm +  and 2mm +
obovate +
reclining +  and erect +
0 cm0 mm <br />0 m <br /> (100 cm1,000 mm <br />1 m <br />) +
petal-like +
not indented +  and rounded +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +