Thelesperma longipes
Thelesperma flavodiscum
long-stalk greenthread, rayless greenthread
east Texas greenthread
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.
± scattered over proximal 9/10 of plant heights, internodes mostly 35–100+ mm;
lobes mostly linear to filiform, sometimes oblanceolate, (10–)25–45+ × 0.5–1(–2) mm.
0.
8;
laminae yellow, 12–20+ mm.
yellow, sometimes with red-brown nerves, throats equal to or longer than lobes.
yellow, often with red-brown nerves, throats shorter than lobes.
of 5 ovate bractlets 1–3 mm.
of 7–9 linear to narrowly triangular bractlets 4–6(–8) mm.
2–3 mm;
pappi usually 0, rarely 0.1–0.3+ mm.
4–5 mm;
pappi 0.5–1.5+ mm.
= 40.
= 18, 20.
Thelesperma longipes
Thelesperma flavodiscum
Differences between Thelesperma flavodiscum and T. filifolium are subtle; they may be better treated as one species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
WildflowerSearch
iNaturalist
USDA Plants Database
