Thelesperma megapotamicum |
Asteraceae tribe heliantheae subtribe coreopsidinae |
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green threads, Hopi tea, Hopi tea greenthread, rayless greenthread |
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Habit | Perennials or subshrubs, (20–)30–80+ cm. | |
Cauline leaves | ± scattered over proximal 1/2–3/4 of plant heights, internodes mostly 40–100 mm; lobes mostly linear to filiform, sometimes oblanceolate, 20–40(–50+) × 0.5–1(–2.5) mm. |
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Ray florets | 0. |
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Disc corollas | yellow, often with red-brown nerves, throats shorter than lobes. |
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Calyculi | of 3–5+ ovate to oblong bractlets 1–2(–3) mm. |
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Cypselae | 5–8 mm; pappi 1–2(–3) mm. |
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2n | = 22, 44. |
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Thelesperma megapotamicum |
Asteraceae tribe heliantheae subtribe coreopsidinae |
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Phenology | Flowering (Apr–)May–Oct. | |
Habitat | Disturbed places on sands or clays, oak/juniper woodlands, desert scrub, yellow-pine forests | |
Elevation | 300–2900 m (1000–9500 ft) | |
Distribution |
AR; AZ; CO; KS; NE; NM; OK; SD; TX; UT; WY; South America; Mexico (Chihuahua, Coahuila)
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Discussion | Thelesperma megapotamicum sometimes persists after plantings outside its natural range in the flora area and may become established (e.g., in California). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 21, p. 202. | |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Thelesperma | |
Sibling taxa | ||
Synonyms | Bidens megapotamica, T. gracile | |
Name authority | (Sprengel) Kuntze: Revis. Gen. Pl. 3(2): 182. (1898) | |
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