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alkali hymenoxys, Lemmon's bitterweed, Lemmon's goldflower, Lemmon's rubberweed, Lemmon's rubberweed or bitterweed

Vasey's rubberweed, Vasey's rubberweed or bitterweed

Habit Perennials, 30–50 cm (polycarpic; often with moderately branched, woody caudices). Perennials, 20–60 cm (polycarpic; often with moderately branched, woody caudices).
Stems

3–10(–15), green throughout or purple-red-tinted proximally, branched distally, glabrous or ± sparsely hairy.

1–10, green throughout or sometimes purple-red-tinted proximally, sparingly or moderately branched distally, ± hairy.

Leaves

blades simple or lobed (lobes 3–13), glabrous or sparsely hairy, gland-dotted;

mid leaves lobed (lobes 3–7, terminal lobes 1.5–2.3 mm wide).

blades usually lobed (lobes 3–23), glabrous or sparsely hairy, gland-dotted (basal leaf bases sparsely, if at all, long-villous-woolly);

mid leaves lobed (lobes 5–21, terminal lobes 0.8–1.2 mm wide).

Peduncles

(1–)2–4.5 cm, glabrous or ± hairy.

1.5–5.5 cm, ± hairy.

Involucres

subhemispheric to campanulate, 8–11 × 12–15 mm.

campanulate, 8–9 × 8–11 mm.

Ray florets

9–12;

corollas yellow, 10–16 × 4–6.5 mm.

8–11;

corollas yellow, 9–15 × 4–7 mm.

Disc florets

50–125+;

corollas 3.5–4.2 mm.

25–80+;

corollas 3.5–4.2 mm.

Phyllaries

in 2 series, unequal;

outer 10–12, basally connate 1/4–1/2 their lengths (moderately to strongly keeled), ovate to lanceolate, 4.5–7 mm, apices acuminate to acute;

inner 13–18(–28), obovate, 4–6 mm, apices usually mucronate.

in 2 series, unequal;

outer 8–11, basally connate 1/2–2/3 their lengths, obovate, 4.5–6 mm, apices acute;

inner 8–12, obovate, 4.5–6 mm, apices mucronate.

Heads

10–85+ per plant, in paniculiform to corymbiform arrays.

10–50+ per plant, in paniculiform to corymbiform arrays.

Cypselae

obpyramidal to narrowly obpyramidal, 2.5–3.5 mm;

pappi of 5(–6) obovate, aristate scales (1.5–)2.1–2.8 mm.

narrowly obpyramidal, 2–2.7 mm;

pappi of 5–6 obovate, aristate scales 1.7–2.7 mm.

2n

= 30.

= 30.

Hymenoxys lemmonii

Hymenoxys vaseyi

Phenology Flowering (Jun–)Jul–Aug(–Sep). Flowering (Jun–)Jul–Sep.
Habitat Roadsides, open areas, meadows, on slopes, along drainages and streams Open areas, edges of forests
Elevation (800–)1400–2200(–3200) m ((2600–)4600–7200(–10500) ft) 1600–2100(–2500) m (5200–6900(–8200) ft)
Distribution
from FNA
CA; NV; UT
[WildflowerSearch map]
[BONAP county map]
from FNA
NM; TX
[BONAP county map]
Discussion

Of conservation concern.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 21, p. 443. FNA vol. 21, p. 442.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Hymenoxys Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Hymenoxys
Sibling taxa
H. ambigens, H. bigelovii, H. brachyactis, H. brandegeei, H. cooperi, H. grandiflora, H. helenioides, H. hoopesii, H. jamesii, H. odorata, H. quinquesquamata, H. richardsonii, H. rusbyi, H. subintegra, H. texana, H. vaseyi
H. ambigens, H. bigelovii, H. brachyactis, H. brandegeei, H. cooperi, H. grandiflora, H. helenioides, H. hoopesii, H. jamesii, H. lemmonii, H. odorata, H. quinquesquamata, H. richardsonii, H. rusbyi, H. subintegra, H. texana
Synonyms Picradenia lemmonii Actinella vaseyi
Name authority (Greene) Cockerell: Bull. Torrey Bot. Club 31: 477. (1904) (A. Gray) Cockerell: Bull. Torrey Bot. Club 31: 493. (1904)
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