Hibiscus martianus

Zuccarini

Linnaea 24: 193. 1851.

Common names: Heartleaf rose-mallow
Synonyms: Hibiscus cardiophyllus A. Gray
Treatment appears in FNA Volume 6. Treatment on page 258. Mentioned on page 255.

Subshrubs, to 1.5 m, herbage stellate-tomentose throughout, lines of fine curved hairs absent or obscured. Stems: older twigs gray, glabrescent. Leaves: stipules linearlanceolate, (2–) 3–7 (–10) mm; petiole subequal to blade, adaxial fine curved hairs absent or obscured; blade markedly discolorous, broadly ovate, unlobed or shallowly 3-angulate-lobate, 2–8 × 2–8.5 cm, base cordate, margins irregularly dentate or dentate-serrate, apex broadly acute to rounded, surfaces densely tomentose abaxially, less so adaxially, inconspicuous nectary abaxially on midvein near base. Inflorescences solitary flowers in axils of distal leaves. Pedicels jointed below apices, 4–10 cm, exceeding subtending petioles, elongating in fruit; involucellar bractlets (7 or) 8–10, narrowly rhombic-elliptic, 1.2–2 (–2.4) cm, enlarging in fruit, margins not or inconspicuously ciliate. Flowers horizontal or ascending; calyx rotate to campanulate, lobed nearly to base, 1.4–2.4 (–2.7) cm, larger in fruit, lobes narrowly triangular-ovate, apices acute to short-acuminate, nectaries absent; corolla rotate to campanulate, petals bright red, asymmetrically obovate, 1.5–3 × 0.9–2.1 cm, margins ± entire, sometimes undulate, finely hairy abaxially where exposed in bud; staminal column somewhat declinate, bright red, 0.9–1.4 cm, bearing filaments throughout, free portion of filaments secund, 1–5 mm; pollen yellow-orange; styles red, 2–7 mm; stigmas red. Capsules yellowish-brown, ovoid, 1.2–2 cm, apex apiculate, glabrous or with minute hairs near apex and on sutures. Seeds dark-brown, angulately reniform-ovoid, 3–4 mm, stellate-hairy throughout. 2n = 22 (Mexico: Nuevo León).


Phenology: Flowering year-round.
Habitat: Dry, often rocky thorn-scrub and open woodlands
Elevation: 10–800 m

Distribution

V6 465-distribution-map.jpg

Tex., Mexico (Chihuahua), Mexico (Coahuila), Mexico (Hidalgo), Mexico (Nuevo León), Mexico (Puebla), Mexico (San Luis Potosí), Mexico (Tamaulipas)

Discussion

In Texas, Hibiscus martianus occurs from the Big Bend region to the southernmost Gulf Coast, mostly in counties bordering or near the Rio Grande.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Hibiscus martianus"
with minute hairs +  and glabrous +
Orland J. Blanchard Jr. +
Zuccarini +
cordate +
discolorous +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
3-angulate-lobate +, unlobed +  and ovate +
2cm;8.5cm +
2 cm20 mm <br />0.02 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
deciduous +  and persistent +
enlarging +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not spathaceous +
2.4 cm24 mm <br />0.024 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
persistent +
lobed +, rotate +  and campanulate +
1.4 cm14 mm <br />0.014 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
yellowish-brown +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
indehiscent +  and loculicidal +
Heartleaf rose-mallow +
Tex. +, Mexico (Chihuahua) +, Mexico (Coahuila) +, Mexico (Hidalgo) +, Mexico (Nuevo León) +, Mexico (Puebla) +, Mexico (San Luis Potosí) +  and Mexico (Tamaulipas) +
10–800 m +
sparse;copious +
pistillate +  and staminate +
ascending +  and horizontal +
unisexual +  and bisexual +
spheroid +  and ovoid +
Dry, often rocky thorn-scrub and open woodlands +
minute +
stellate-tomentose +
tough-fibrous +
connate +  and distinct +
simple +, stipulate +, sessile +, subsessile +  and petiolate +
distichous +  and alternate +
triangular-ovate +
entire +, dentate-serrate +  and dentate +
undulate +
wedge--shaped +
inconspicuous +
5-carpellate +
8 +  and 60 +
elongating +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
adnate +  and distinct +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (?) +  and 2.1 cm21 mm <br />0.021 m <br /> (?) +
subequal +
Flowering year-round. +
yellow-orange +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
stellate-hairy +
not +  and papillose +
reniform-ovoid +
3mm +  and 4mm +
persistent +
sessile +  and subsessile +
exserted +  and included +
0.9 cm9 mm <br />0.009 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
wedge--shaped +  and discoid +
1-2 times number of carpels +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Hibiscus cardiophyllus +
Hibiscus martianus +
Hibiscus +
species +
glabrescent +
perennial +  and annual +
hairy +  and glabrous +
monoecious +, dioecious +  and hermaphroditic +
[27 +, 26 +, [20 +, 19 +, 18 +, 15 +  and 17 +