Mentzelia perennis |
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perennial blazingstar |
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Habit | Plants perennial, bushlike, with ground-level caudices. |
Stems | multiple, erect, straight; branches distal, distal longest, antrorse, straight; hairy. |
Leaves | blade 25–100 × 1–18.1 mm, widest intersinus distance 1–4.2 mm; proximal spatulate to elliptic, margins entire or dentate to pinnatisect, teeth or lobes 0–26, slightly antrorse, 0.6–9.5 mm; distal oblanceolate, elliptic, or lanceolate, base not clasping, margins entire, serrate, or pinnatisect, teeth or lobes 0–24, slightly antrorse, 0.4–7.1 mm; abaxial surface with needlelike and occasionally simple and complex grappling-hook trichomes, adaxial surface with simple grappling-hook and needlelike trichomes. |
Bracts | margins usually entire, occasionally pinnate. |
Flowers | petals light yellow, 11.4–19(–22.7) × 1.8–3.6(–5) mm, apex acute, glabrous abaxially; stamens light yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 11–18.1(–22.7) × (0.5–)1–3.7 mm, without anthers, second whorl without anthers; anthers straight after dehiscence, epidermis papillate; styles 7.5–11.4 mm. |
Capsules | cup-shaped, 6.8–12 × (4–)4.8–9.1 mm, base tapering or rounded, not longitudinally ridged. |
Seeds | coat anticlinal cell walls wavy, papillae 6–14 per cell. |
2n | = 18. |
Mentzelia perennis |
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Phenology | Flowering Jul–Aug. |
Habitat | Roadsides, hillside slopes, gypsum-rich soils. |
Elevation | 1200–2200 m. (3900–7200 ft.) |
Distribution |
NM
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Discussion | Mentzelia perennis is known from central New Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 507. |
Parent taxa | Loasaceae > Mentzelia > sect. Bartonia |
Sibling taxa | |
Name authority | Wooton: Bull. Torrey Bot. Club 25: 260. (1898) |
Web links |