Mentzelia aspera

Linnaeus

Sp. Pl. 1: 516. 1753.

Common names: Rough stickleaf dal-pega
Treatment appears in FNA Volume 12. Treatment on page 528. Mentioned on page 527, 529.

Plants annual, without caudices or tubers. Stems erect to decumbent, to 30 cm. Leaves: petiole 10–65 mm; blade hastate to ovate, usually basally lobed, sometimes unlobed, to 18 × 10 cm, base cuneate to truncate, margins serrate to crenate, apex acute. Pedicels (fruiting) 1–3 × 2 mm (often appearing absent because thick and continuous with capsule). Flowers: petals orange or yellow, 5–15 × 3–7 mm, apex cuspidate, hairy abaxially at apex; stamens 20–30, 5 mm, filaments heteromorphic, 5 outermost narrowly spatulate, inner filiform; style 5 mm. Capsules subcylindric to clavate, 9–30 × 3–3.5 mm, base tapering gradually, capsule and pedicel not well-differentiated. Seeds 5–9 per capsule, pyriform to oblong, without transverse folds. 2n = 20.


Phenology: Flowering Aug–Oct.
Habitat: Arroyo and canyon bottoms, grasslands, desert scrub, riparian cottonwood and willow vegetation.
Elevation: 100–2000 m.

Distribution

V12 327-distribution-map.jpg

Ariz., Mexico, West Indies, Central America, South America, in Atlantic Islands (Cape Verde Islands)

Discussion

Mentzelia aspera is uncommon in southern Arizona. It is the most widespread species of the genus and is regarded as weedy by some authors (H. J. Thompson and A. M. Powell 1981).

Selected References

None.

Lower Taxa

None.
... more about "Mentzelia aspera"
heteromorphic +
inner +  and outer +
unlobed +, filiform +, spatulate +  and flattened +
Larry Hufford +
Linnaeus +
tapering +  and cuneate to truncate +
0 cm0 mm <br />0 m <br /> (18 cm180 mm <br />0.18 m <br />) +
unlobed;lobed;hastate;ovate +
0 cm0 mm <br />0 m <br /> (10 cm100 mm <br />0.1 m <br />) +
curved +  and straight +
0.9 cm9 mm <br />0.009 m <br /> (3 cm30 mm <br />0.03 m <br />) +
subcylindric +  and clavate +
not well-differentiated +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Rough stickleaf +  and dal-pega +
Ariz. +, Mexico +, West Indies +, Central America +, South America +  and in Atlantic Islands (Cape Verde Islands) +
100–2000 m. +
curved +  and straight +
s--shaped +, clavate +, urceolate +, ovoid +, cylindric +, subcylindric +, lingulate +  and cup-shaped +
Arroyo and canyon bottoms, grasslands, desert scrub, riparian cottonwood and willow vegetation. +
free +  and adnate +
cauline +  and basal +
serrate +  and crenate +
apical +, subapical +  and inferior +
0.1 cm1 mm <br />0.001 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
not well-differentiated +
inconspicuous +
yellow +  and orange +
connate +  and distinct +
5mm;15mm +
spreading +  and erect +
hairy +  and glabrous +
obovate +, oblanceolate +, elliptic +, ovate +  and spatulate +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 cm10 mm <br />0.01 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
Flowering Aug–Oct. +
pyriform +  and oblong +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
persistent +
lanceolate +  and narrowly ovate +
adnate +, free +  and distinct +
included +  and exserted +
8 +  and 45 +
5 cm50 mm <br />0.05 m <br /> (2 cm20 mm <br />0.02 m <br />) +
erect +  and decumbent +
0 cm0 mm <br />0 m <br /> (30 cm300 mm <br />0.3 m <br />) +
papillate +
3-lobed +  and lingulate +
5 cm50 mm <br />0.05 m <br /> (?) +
Mentzelia aspera +
Mentzelia sect. Mentzelia +
species +
dendritic +  and unbranched +
sinuous +