Packera crocata |
Packera tridenticulata |
|
---|---|---|
saffron ragwort |
threetooth ragwort |
|
Habit | Perennials, 20–60+ cm; perennating bases horizontal to ascending (relatively long and stout). | Perennials, 10–30+ cm; taprooted (caudices ascending to erect). |
Stems | usually 1, rarely 2–3, clustered, glabrous. |
1 or multiple, clustered, usually glabrous, rarely sparsely floccose-tomentose, leaf axils sometimes tomentose. |
Basal leaves | (and proximal cauline) petiolate (petioles narrow); blades narrowly lanceolate or ovate to oblong-ovate, 20–60+ × 10–40+ mm, bases abruptly contracted to tapering, margins subentire to crenate-dentate. |
(and proximal cauline, relatively thick and turgid) petiolate; blades lanceolate or narrowly oblanceolate, 20–40+ × 5–15 mm, bases tapering, margins usually entire, sometimes sub-pinnatisect (apices subentire or dentate). |
Cauline leaves | gradually reduced (sessile, weakly clasping; lanceolate to oblong or sublyrate, often pinnately lobed). |
gradually reduced (± petiolate or sessile). |
Peduncles | ebracteate or bracteate (bractlets inconspicuous), glabrous. |
bracteate, glabrous or sparsely tomentose. |
Ray florets | 8 or 13; corolla laminae (deep yellow to orange-red) 6–8+ mm. |
8–10(–13); corolla laminae 5–8+ mm. |
Disc florets | 60–80+; corolla tubes 4.5–5.5 mm, limbs 2.5–3.5 mm. |
45–60+; corolla tubes 3–3.5 mm, limbs 4–5 mm. |
Phyllaries | 13 or 21, light green (or tips cyanic), 4–8 mm, glabrous. |
13 or 21, green, 6–10 mm, sparsely tomentose proximally, glabrous distally. |
Calyculi | 0 or inconspicuous. |
inconspicuous. |
Heads | 7–15+ in open, corymbiform arrays. |
4–15+ in corymbiform arrays. |
Cypselae | 1–1.5 mm, glabrous; pappi 3–5 mm. |
1.5–2.5 mm, glabrous or sparsely hirtellous on ribs; pappi 5–6 mm. |
2n | = 46. |
= 46. |
Packera crocata |
Packera tridenticulata |
|
Phenology | Flowering early Jul–mid Aug. | Flowering late May–early Jul. |
Habitat | Wet meadows, along trails, rocky outcrops | Open, dry areas, roadsides, gravelly or sandy slopes, short-grass prairies or sagebrush scrubs |
Elevation | 1800–3500 m (5900–11500 ft) | 1000–2000 m (3300–6600 ft) |
Distribution |
CO; ID; NM; NV; UT; WY
|
CO; KS; ND; NE; NM; OK; SD; TX; WY
|
Discussion | Packera crocata is characterized by deep yellow to reddish orange corollas. Some collectors have noted that there may be evidence for hybridization between P. crocata and P. dimorphophylla; the relationship between the two species needs further study. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Packera tridenticulata is found throughout the central High Plains, in the foothills of the Rocky Mountains, and in high valleys to the west of the Rocky Mountain front. It tends to grow in clumps; the multiple stems arise from well-developed taproots. It apparently hybridizes with P. neomexicana var. mutabilis where their ranges overlap. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 583. | FNA vol. 20, p. 601. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio crocatus, Senecio pyrrhochrous, Senecio tracyi | Senecio tridenticulatus, Senecio acutidens, Senecio compactus, Senecio densus, Senecio oblanceolatus |
Name authority | (Rydberg) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) | (Rydberg) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) |
Web links |