Manihot angustiloba

(Torrey) Müller Arg. in A. P. de Candolle and A. L. P. P. de Candolle

Prodr. 15(2): 1073. 1866.

Common names: Desert mountain manihot narrow-leaved cassava pata de gallo
Basionym: Janipha manihot var. angustiloba Torrey in W. H. Emory Rep. U.S. Mex. Bound. 2(1): 199. 1859
Treatment appears in FNA Volume 12. Treatment on page 194. Mentioned on page 193.

Herbs or subshrubs, 1–3 m. Roots thickened. Stems erect, terete when young; nodes not swollen; leaf and stipule-scars not elevated. Leaves: stipules lanceolate, entire; petiole 3–12 cm; blade basally attached, 5–7-lobed, lobes with acute secondary lobes proximally, median lobe 5–15 cm, margins neither thickened nor revolute, remotely serrate, apex acute, surfaces glabrous, abaxial smooth. Inflorescences axillary, racemes, to 12 cm. Pedicels: staminate 3–8 mm; pistillate 10–25 mm in fruit, downcurved. Staminate flowers: calyx campanulate, 10–18 mm, lobes erect or spreading; stamens 10. Capsules 1.5 cm, finely tuberculate, not winged. Seeds globose, 12 mm.


Phenology: Flowering Jul–Oct.
Habitat: Desert scrub, thorn scrub, oak woodlands, oak grasslands.
Elevation: 30–2000 m.

Distribution

Ariz., Mexico (Baja California Sur), Mexico (Chihuahua), Mexico (Sinaloa), Mexico (Sonora)

Discussion

D. J. Rogers and S. G. Appan (1973) noted the overall similarity and nearly identical geographic ranges of Manihot angustiloba and M. davisiae, yet they maintained these taxa as separate species, presumably because of their (nearly) constant and consistent differences in leaf lobe outline. Manihot angustiloba has generally narrow, nearly linear, primary lobes with a pair of serrate secondary lobes forming the widest portion of the lobe proximal to the middle; M. davisiae has generally broader leaf lobes with one pair of rounded secondary lobes that form the widest portion of the lobe distal to the middle, or two pairs of nearly equal, rounded, secondary lobes proximal and distal to the middle. Some specimens exhibit an intermediate condition: primary lobes that are narrow distally but also bear a pair of rounded secondary lobes proximal to the middle.

In the flora area, Manihot angustiloba is restricted to Cochise, Pima, and Santa Cruz counties.

Selected References

None.

Lower Taxa

None.
... more about "Manihot angustiloba"
W. John Hayden +
(Torrey) Müller Arg. in A. P. de Candolle and A. L. P. P. de Candolle +
Janipha manihot var. angustiloba +
5-7-lobed +
campanulate +
1 cm10 mm <br />0.01 m <br /> (?) +  and 1.8 cm18 mm <br />0.018 m <br /> (?) +
tuberculate +
1.5 cm15 mm <br />0.015 m <br /> (?) +
Desert mountain manihot +, narrow-leaved cassava +  and pata de gallo +
Ariz. +, Mexico (Baja California Sur) +, Mexico (Chihuahua) +, Mexico (Sinaloa) +  and Mexico (Sonora) +
30–2000 m. +
subtending +
Desert scrub, thorn scrub, oak woodlands, oak grasslands. +
deciduous +  and persistent +
not elevated +
spreading +  and erect +
lobed;undivided +
palmate +  and pinnate +
serrate +, repand +  and entire +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
intrastaminal +
not swollen +
pistillate +  and staminate +
elongating +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
connate;distinct +
3 cm30 mm <br />0.03 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Flowering Jul–Oct. +
0 cm0 mm <br />0 m <br /> (12 cm120 mm <br />0.12 m <br />) +
globose +
distinct +  and connate +
0.7 cm7 mm <br />0.007 m <br /> (2 cm20 mm <br />0.02 m <br />) +
papillate +
flabellate +
Manihot angustiloba +
species +
subshrub +  and herb +
dioecious +  and monoecious +