Tagetes lemmonii |
Tagetes |
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Lemmon's marigold |
marigold |
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Habit | Perennials, subshrubs, or shrubs 10–50(–100+) cm. | Annuals, perennials, subshrubs, or shrubs [perennials], mostly 10–80(–200) cm. | ||||||||||||
Stems | erect, branched distally or ± throughout. |
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Leaves | blades 50–70(–120+) mm overall, lobes or leaflets (3–)5–7+, lance-elliptic to lanceolate, 15–30(–45) × 3–7(–10+) mm. |
cauline; mostly opposite (distal sometimes alternate); petiolate or sessile; blades mostly lanceolate to oblanceolate overall, usually 1–3-pinnately lobed or -pinnatisect, ultimate margins toothed or entire, faces glabrous or hairy (oil-glands scattered and/or submarginal). |
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Peduncles | 10–50 mm. |
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Involucres | 8–10 × 5–7 mm. |
narrowly cylindric or fusiform to turbinate or broadly campanulate, 1–12+ mm diam. |
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Receptacles | convex to conic, smooth or finely pitted, epaleate. |
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Ray florets | (3–)5–8+; laminae yellow, ± oblong, 9–15+ mm. |
0 or 1–8(–13+) (to 100+ in “double” cultivars), pistillate, fertile (except “double” cultivars); corollas yellow or orange, red-brown (with or without yellow/orange), or white. |
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Disc florets | 12–30+; corollas 6–7 mm. |
6–120+, bisexual, fertile; corollas greenish yellow to orange, sometimes tipped with red or red-brown, tubes much longer than or about equaling funnelform throats, lobes 5, deltate to lance-linear (equal or 2 sinuses deeper than others). |
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Phyllaries | persistent, 3–21+ in 1–2 series (connate to 7/8+ their lengths, usually streaked and/or dotted with oil-glands). |
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Calyculi | 0. |
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Heads | in ± corymbiform arrays. |
radiate or discoid, borne singly or in ± corymbiform arrays. |
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Cypselae | 5–6 mm; pappi of 0–5 lanceolate- to subulate-aristate scales 2.5–3+ mm plus 5+ lanceolate to oblong, ± erose scales 0.5–1 mm, distinct or connate, linear-oblong, ± erose scales 2–6+ mm. |
narrowly obpyramidal or fusiform-terete, sometimes weakly flattened, glabrous or hairy; pappi persistent, of 2–5(–10) dissimilar, distinct or connate scales in ± 1 series: 0–5+ oblong to lanceolate, erose-truncate or laciniate plus 0–2(–5) longer, subulate to aristate. |
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x | = 12. |
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2n | = 24. |
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Tagetes lemmonii |
Tagetes |
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Phenology | Flowering (Aug–)Sep–Nov. | |||||||||||||
Habitat | Moist sites, grasslands, scrublands, woodlands, cliffs, streamsides | |||||||||||||
Elevation | 1400–2500 m (4600–8200 ft) | |||||||||||||
Distribution |
AZ; Mexico (Sinaloa, Sonora)
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Tropical and warm-temperate America; especially Mexico [Introduced in Old World] |
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Discussion | Species 40+ (4 in the flora). Some Tagetes species (e.g., T. erecta) produce nematicidal thiophenes in their roots and have been shown to be effective controls for nematodes in diverse crops (cf., http://www.ncagr.com/agronomi/nnote1.htm). Reports of “Tagetes minima L.” for Pennsylvania (cf. http://plants.usda.gov) are evidently rooted in an error for T. minuta. Report of T. pusilla Kunth (= T. filifolia Lagasca) for Maryland (http://plants.usda.gov) was not verified for this treatment. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 21, p. 236. | FNA vol. 21, p. 235. | ||||||||||||
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Pectidinae > Tagetes | Asteraceae > tribe Heliantheae > subtribe Pectidinae | ||||||||||||
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Subordinate taxa | ||||||||||||||
Name authority | A. Gray: Proc. Amer. Acad. Arts 19: 40. (1883) | Linnaeus: Sp. Pl. 2: 887. (1753): Gen. Pl. ed. 5, 378. (1754) | ||||||||||||
Web links |