Chylismia multijuga |
Chylismia eastwoodiae |
|
---|---|---|
froststem suncup |
|
|
Habit | Herbs annual or biennial, villous, at least proximally, glabrous or even glaucous distally, rarely glandular puberulent. | Herbs annual, succulent, glabrous, glandular puberulent, or villous proximally. |
Stems | virgate with numerous divergent branches, 20–150 cm. |
unbranched or branched from base, 3–30 cm. |
Leaves | primarily in well-developed basal rosette, cauline reduced or absent, 6–30 × 1.4–6.5 cm; petiole 0.3–6 cm; blade pinnately or bipinnately lobed, terminal lobe ovate to elliptic, 2.5–6.5 × 1.5–3 cm, margins irregularly serrate, dark brown oil cells prominently lining veins abaxially. |
primarily in basal rosette and also cauline; petiole 0.5–8 cm; blade usually not pinnately lobed or, if so, then lateral lobes greatly reduced, terminal lobe oblanceolate to cordate, 0.8–7.5 × 0.4–3 cm, margins entire or sparsely denticulate, pale brown oil cells lining veins abaxially. |
Racemes | erect to nodding, elongating in bud. |
nodding, elongating after anthesis. |
Flowers | opening at sunrise; buds individually reflexed, with apical or slightly subapical free tips less than 1 mm; floral tube 1–3 mm, glabrous or villous inside proximally; sepals 3–8 mm; petals usually bright yellow, rarely cream, fading yellow to lavender, 4–9 mm; stamens unequal, filaments of antisepalous stamens 2.5–4 mm, those of antipetalous ones 1.3–3 mm, anthers 2–4 mm, ciliate; style 7–11 mm, stigma exserted beyond anthers at anthesis. |
opening at sunrise; buds without subapical free tips; floral tube 2–4.5 mm, villous inside proximally; sepals 3–8 mm; petals bright yellow, with red dots near base, fading pale yellow or yellowish orange, 5.5–9 mm; stamens unequal, filaments of antisepalous stamens 3–8 mm, those of antipetalous ones 2.8–5.5 mm, anthers 2–4 mm, ciliate; style 10–17 mm, stigma exserted beyond anthers at anthesis. |
Capsules | usually spreading, rarely slightly reflexed, oblong-cylindrical, 10–52 mm; pedicel 7–20 mm. |
erect, spreading, or slightly reflexed, clavate, 18–40 mm; pedicel 4–28 mm. |
Seeds | 1–1.3 mm. |
1.2–1.7 mm. |
2n | = 14. |
= 14. |
Chylismia multijuga |
Chylismia eastwoodiae |
|
Phenology | Flowering Mar–Jun(–Sep). | Flowering Apr–Jun. |
Habitat | Forming colonies on rocky slopes and banks of eroded sedimentaries, on gypsum or limestone, on conglomerates, often with Juniperus and Pinus edulis, with Encelia farinosa and Larrea. | Clay flats, on gray, alkaline, marine-deposited gumbo, sandy draws. |
Elevation | 300–1100 m. (1000–3600 ft.) | 1200–1800 m. (3900–5900 ft.) |
Distribution |
AZ; NV; UT
|
CO; UT |
Discussion | Chylismia multijuga is known from Washington County, Utah, and southern Lincoln County, Nevada, to northern Mohave County, Arizona. P. H. Raven (1962, 1969) determined this species to be self-incompatible. It hybridizes with C. brevipes subspp. brevipes and pallidula. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Chylismia eastwoodiae is known from Mesa County, Colorado, and from Emery County south to San Juan County, Utah. P. H. Raven (1962, 1969) suspected this species to be self-incompatible, but did not have data to make the determination. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 10. | FNA vol. 10. |
Parent taxa | Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Chylismia | Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Chylismia |
Sibling taxa | ||
Synonyms | Oenothera multijuga, Camissonia multijuga, Chylisma hirta, C. parviflora, C. venosa, O. brevipes var. multijuga, O. brevipes var. parviflora, O. multijuga var. parviflora, O. phlebophylla, O. watsonii | Oenothera scapoidea var. eastwoodiae, Camissonia eastwoodiae, O. eastwoodiae |
Name authority | (S. Watson) Small: Bull. Torrey Bot. Club 23: 193. (1896) — (as Chylisma) | (Munz) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 207. (2007) |
Web links |