Hibiscus coulteri

Harvey ex A. Gray

Smithsonian Contr. Knowl. 3(5): 23. 1852.

Common names: Desert rose-mallow
Illustrated
Treatment appears in FNA Volume 6. Treatment on page 256. Mentioned on page 253, 255, 258.

Subshrubs, to 2 m, herbage with appressed-stellate and simple hairs throughout. Stems: stellate hairs of younger stems dense, appressed, 4-armed, arms approximate in pairs, aligned with stem axis, lines of fine, curved hairs absent or obscured; older growth grayish, rough, glabrescent. Leaves: stipules linear-subulate, 3–10 mm; petiole primarily in distal 1/2, sometimes themselves shallowly pinnately lobed, surfaces scabridulous, hairs appressed-stellate, obscure nectary present abaxially on midvein near base. Inflorescences solitary flowers in axils of distal leaves. Pedicels jointed below apices, to 17 cm, usually much exceeding subtending leaves; involucellar bractlets 8–14, linear-subulate, 1–2 cm, margins ciliate. Flowers erect or ascending; calyx divided 3/4+ length, funnelform, 1.4–2.2 cm, equaling or slightly exceeding involucel, lobes narrowly lanceolate-triangular, margins ciliate, apices attenuate, nectaries absent; corolla rotate, petals yellow to cream, usually with dark to obscure maroon lines basally, asymmetrically obovate to broadly obovate, 1.6–4 × 1–3.5 cm, margins ± entire, sparingly hairy abaxially where exposed in bud; staminal column straight, yellow or cream, 0.6–1.4 cm, bearing filaments throughout, free portion of filaments not secund, 1–3 mm; pollen yellow-orange; styles cream, 1.5–5 mm; stigmas maroon or cream. Capsules pale olivaceous gray with darker median stripe on each valve, ovoid or ellipsoid, 0.7–1.7 cm, to 2/3 calyces, apex rounded, hairy near apex or glabrous throughout. Seeds dark-brown, angulately reniform-ovoid, 2.4–3 mm, silky-hairy ± throughout.


Phenology: Flowering nearly year-round.
Habitat: Desert, rocky slopes
Elevation: 600–1600 m

Distribution

V6 462-distribution-map.jpg

Ariz., N.Mex., Tex., Mexico (Baja California), Mexico (Chihuahua), Mexico (Coahuila), Mexico (Durango), Mexico (Nuevo León), Mexico (Sonora), Mexico (Zacatecas)

Discussion

Hibiscus coulteri has been recorded in the southern half of Arizona; in Otero County, New Mexico; and in the region west of the Pecos River in Texas.

A naturally occurring hybrid between Hibiscus coulteri and H. denudatus (Hibiscus ×sabei Weckesser) has recently been documented from western Texas (W. Weckesser 2011).

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Hibiscus coulteri"
glabrous +  and hairy +
rounded;attenuate +
aligned +  and approximate +
Orland J. Blanchard Jr. +
Harvey ex A. Gray +
asymmetric +  and symmetric +
dissected +, lobed +  and unlobed +
deciduous +  and persistent +
linear-subulate +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not spathaceous +
persistent +
divided +
accrescent +
1.4 cm14 mm <br />0.014 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
slightly exceeding involucel +  and equaling +
gray +  and pale olivaceous +
ellipsoid;ovoid +
0.7 cm7 mm <br />0.007 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
indehiscent +  and loculicidal +
Desert rose-mallow +
Ariz. +, N.Mex. +, Tex. +, Mexico (Baja California) +, Mexico (Chihuahua) +, Mexico (Coahuila) +, Mexico (Durango) +, Mexico (Nuevo León) +, Mexico (Sonora) +  and Mexico (Zacatecas) +
600–1600 m +
sparse;copious +
pistillate +  and staminate +
ascending +  and erect +
unisexual +  and bisexual +
spheroid +  and ovoid +
glabrescent +
Desert, rocky slopes +
4-armed +  and simple +
appressed-stellate +  and stellate +
tough-fibrous +
connate +  and distinct +
simple +, stipulate +, sessile +, subsessile +  and petiolate +
distichous +  and alternate +
dark +  and obscure maroon +
lanceolate-triangular +
wedge--shaped +
5-carpellate +
8 +  and 60 +
0 cm0 mm <br />0 m <br /> (17 cm170 mm <br />0.17 m <br />) +
yellow;cream +
adnate +  and distinct +
1.6cm;4cm +
asymmetrically obovate;broadly obovate +
1 cm10 mm <br />0.01 m <br /> (?) +  and 3.5 cm35 mm <br />0.035 m <br /> (?) +
Flowering nearly year-round. +
yellow-orange +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Smithsonian Contr. Knowl. +
dark-brown +
silky-hairy +
not +  and papillose +
reniform-ovoid +
0.24 cm2.4 mm <br />0.0024 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
persistent +
Illustrated +
sessile +  and subsessile +
cream +  and yellow +
exserted +  and included +
0.6 cm6 mm <br />0.006 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
cream +  and maroon +
wedge--shaped +  and discoid +
1-2 times number of carpels +
linear-subulate +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
scabridulous +
Mallow +
Hibiscus coulteri +
Hibiscus +
species +
perennial +  and annual +
hairy +  and glabrous +
monoecious +, dioecious +  and hermaphroditic +
[27 +, 26 +, [20 +, 19 +, 18 +, 15 +  and 17 +