Hibiscus coulteri |
Hibiscus moscheutos |
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Coulter's hibiscus, desert rose-mallow |
common rose-mallow, crimsoneyed rosemallow, swamp rose-mallow |
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Habit | Subshrubs, to 2 m, herbage with appressed-stellate and simple hairs throughout. | Herbs, perennial, to 2.5 m. Stems glabrous or variously hairy, but without line of curved hairs. | ||||
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. |
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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. |
stipules subulate, 1–4 mm; petiole 1/4–3/4 blade, glabrate or finely hairy; blade narrowly to broadly lanceolate to triangular-ovate or orbiculate, 3-lobed or unlobed, 8–20 × 3–13 cm, base cordate to cuneate, margins crenate to dentate or serrate, apex acute to acuminate, surfaces variously hairy, sometimes glabrous adaxially, nectary absent. |
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Inflorescences | solitary flowers in axils of distal leaves. |
solitary flowers in axils of distal leaves, pedicels of later-produced flowers often adnate to subtending petioles. |
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Pedicels | jointed below apices, to 17 cm, usually much exceeding subtending leaves; involucellar bractlets 8–14, linear-subulate, 1–2 cm, margins ciliate. |
variously jointed sub-basally to distally, 2–15 cm, 1/2–1 1/2 as long as petiole, glabrate or finely hairy; involucellar bractlets [8–]10–14[or 15], linear-lanceolate, 0.5–4.5(–5) cm, margins ciliate or not, hairy. |
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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. |
± horizontal to slightly declinate; calyx divided 1/2–2/3 length, broadly campanulate, 1.5–4 cm, somewhat larger in fruit, lobes triangular or triangular-ovate, apices acute to subcaudate, surfaces hairy, nectaries absent; corolla funnelform to broadly so, petals pink or white, sometimes with red spot basally, narrowly to broadly, obliquely obovate, 4–12 × 3.5–6.5 cm, margins repand, sometimes undulate, minutely hairy abaxially mostly where exposed in bud; staminal column straight, white or cream, 1.2–5 cm, to 1/2 as long as petals, bearing filaments nearly throughout, free portion of filaments not secund, 2–8 mm; pollen yellow; styles white, 10–40 mm; stigmas creamy white to yellow. |
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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. |
dark brown, ovoid to subglobose, 1.4–3.5 cm, apex apiculate, glabrous or hairy. |
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Seeds | dark brown, angulately reniform-ovoid, 2.4–3 mm, silky-hairy ± throughout. |
brown, reniform-globose, 2.5–3 mm, verrucose-papillose. |
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2n | = 38. |
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Hibiscus coulteri |
Hibiscus moscheutos |
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Phenology | Flowering nearly year-round. | |||||
Habitat | Desert, rocky slopes | |||||
Elevation | 600–1600 m (2000–5200 ft) | |||||
Distribution |
AZ; NM; TX; Mexico (Baja California, Chihuahua, Coahuila, Durango, Nuevo León, Sonora, Zacatecas)
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AL; AR; CA; CT; DC; DE; FL; GA; IL; IN; KS; KY; LA; MA; MD; MI; MO; MS; NC; NH; NJ; NM; NY; OH; OK; PA; RI; SC; TN; TX; VA; WI; WV; ON; n Mexico [Introduced in Europe (sw France, n Italy, nw Portugal), Asia (Georgia)]
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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). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 6, p. 256. | FNA vol. 6, p. 262. | ||||
Parent taxa | Malvaceae > subfam. Malvoideae > Hibiscus | Malvaceae > subfam. Malvoideae > Hibiscus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Harvey ex A. Gray: Smithsonian Contr. Knowl. 3(5): 23. (1852) | Linnaeus: Sp. Pl. 2: 693. (1753) | ||||
Web links |
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