Flora of North America species comparison

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Thelesperma megapotamicum

green threads, Hopi tea, Hopi tea greenthread, rayless greenthread
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.
Ray florets

0.
Disc corollas

yellow, often with red-brown nerves, throats shorter than lobes.
Calyculi

of 3–5+ ovate to oblong bractlets 1–2(–3) mm.
Cypselae

5–8 mm;

pappi 1–2(–3) mm.
2n

= 22, 44.

Thelesperma megapotamicum
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
map from FNA
AR; AZ; CO; KS; NE; NM; OK; SD; TX; UT; WY; South America; Mexico (Chihuahua, Coahuila)
[WildflowerSearch map]
[BONAP county map]
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.)
Parent taxa Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Thelesperma
Sibling taxa
T. ambiguum, T. burridgeanum, T. filifolium, T. flavodiscum, T. longipes, T. nuecense, T. simplicifolium, T. subnudum
Synonyms Bidens megapotamica, T. gracile
Name authority (Sprengel) Kuntze: Revis. Gen. Pl. 3(2): 182. (1898)
Source FNA vol. 21, p. 202. Treatment author: John L. Strother.
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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