Thelesperma subnudum
Thelesperma burridgeanum
hairy greenthread, Navajo tea
burridge's greenthread
mostly crowded over proximal 1/4(–1/2) of plant heights, internodes mostly 1–5(–35 mm);
lobes mostly oblanceolate to linear, (5–)10–35(–45+) × (1–)2–3(–5) mm.
crowded to ± scattered over proximal 1/2–3/4 of plant heights, internodes mostly 5–40(–60+) mm;
lobes mostly linear to filiform, sometimes oblanceolate, 5–25(–45) × 0.5–1(–2+) mm.
0, or 8;
laminae yellow, (6–)12–20+ mm.
8;
laminae wholly red-brown to purplish or mostly red-brown with distal margins yellow to orange, 7–9(–12+) mm.
yellow, sometimes with red-brown nerves, throats equal to or longer than lobes.
red-brown to purplish, throats shorter than lobes.
of 7–9 deltate to lance-linear bractlets 2–4+ mm.
of 5–6(–9) linear to narrowly triangular bractlets 2–4 mm (margins hispido-ciliate).
5–7 mm;
pappi usually 0, rarely 0.1–0.5 mm.
3.5–4 mm;
pappi 0.5–1+ mm.
= 22, 24.
= 18.
Thelesperma subnudum
Thelesperma burridgeanum
As here circumscribed, Thelesperma subnudum includes plants that have been treated as distinct species and/or varieties (some of which have been treated as of conservation concern). See C. J. Hansen et al. (2002) for an alternate interpretation of T. subnudum.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Thelesperma burridgeanum may be a color-form of T. filifolium.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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