FNA: Thelesperma longipes

	Thelesperma longipes
	long-stalk greenthread, rayless greenthread
Habit	Perennials or subshrubs (may flower first year), 20–40+ cm.
Cauline leaves	mostly crowded over proximal 1/4–1/2 of plant heights, internodes mostly 5–25+ mm; lobes mostly linear to filiform, 5–25(–45+) × 0.5(–1) mm.
Ray florets	0.
Disc corollas	yellow, sometimes with red-brown nerves, throats equal to or longer than lobes.
Calyculi	of 5 ovate bractlets 1–3 mm.
Cypselae	2–3 mm; pappi usually 0, rarely 0.1–0.3+ mm.
2n	= 40.

	Thelesperma longipes
Phenology	Flowering (Mar–)Apr–Oct.
Habitat	Openings in desert scrub, limestone ridges
Elevation	500–2100 m (1600–6900 ft)
Distribution	AZ; NM; TX; Mexico (Coahuila, Nuevo León, San Luis Potosí, Tamaulipas) [WildflowerSearch map] [BONAP county map]
Source	FNA vol. 21, p. 201.
Parent taxa	Asteraceae > tribe Heliantheae > subtribe Coreopsidinae > Thelesperma
Sibling taxa	T. ambiguum, T. burridgeanum, T. filifolium, T. flavodiscum, T. megapotamicum, T. nuecense, T. simplicifolium, T. subnudum
Name authority	A. Gray: Smithsonian Contr. Knowl. 3(5): 109. (1852)
Web links	WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

long-stalk greenthread, rayless greenthread

Habit

Perennials or subshrubs (may flower first year), 20–40+ cm.

Cauline leaves

mostly crowded over proximal 1/4–1/2 of plant heights, internodes mostly 5–25+ mm;

lobes mostly linear to filiform, 5–25(–45+) × 0.5(–1) mm.

Ray florets

Disc corollas

yellow, sometimes with red-brown nerves, throats equal to or longer than lobes.

Calyculi

of 5 ovate bractlets 1–3 mm.

Cypselae

2–3 mm;

pappi usually 0, rarely 0.1–0.3+ mm.

= 40.

Phenology

Flowering (Mar–)Apr–Oct.

Habitat

Openings in desert scrub, limestone ridges

Elevation

500–2100 m (1600–6900 ft)

Distribution

AZ; NM; TX; Mexico (Coahuila, Nuevo León, San Luis Potosí, Tamaulipas)

Source

Parent taxa

Sibling taxa

Name authority

A. Gray: Smithsonian Contr. Knowl. 3(5): 109. (1852)

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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