Mentzelia laevicaulis var. laevicaulis

Common names: Giant blazingstar
IllustratedEndemic
Synonyms: Mentzelia acuminata (Rydberg) Tidestrom
Treatment appears in FNA Volume 12. Treatment on page 514.
Revision as of 19:57, 16 December 2019 by FNA>Volume Importer

Leaf blades 39.8–154 × 8.4–40.4 mm, widest intersinus distance 4.9–24.6 mm; proximal oblanceolate to elliptic, margin lobes 18–44, 2.5–8.9 × 3.6–9.6 mm; distal with base clasping or non-clasping, margin lobes 14–42, 2.1–6.1 × 3.2–6.3 mm; adaxial surfaces with needlelike trichomes. Bracts 13–29 × 1–5 mm, margins entire or pinnate. Flowers: petals 43–70 × 8–17.3 mm; 5 outermost stamens 39–55 × 1–2(–2.5) mm. Capsules cylindric, 22–43 × 8–11.1 mm. Seed coat: papillae 4–11 per cell.


Phenology: Flowering May–Oct.
Habitat: Dry streambed bottoms and banks, gravel bars, hillside slopes, roadsides, roadcuts, sand dunes.
Elevation: 0–3000 m.

Distribution

V12 885-distribution-map.jpg

Ariz., Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
John J. Schenk +  and Larry Hufford +
(Douglas) Torrey & A. Gray +
Bartonia laevicaulis +
Giant blazingstar +
Ariz. +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
0–3000 m. +
Dry streambed bottoms and banks, gravel bars, hillside slopes, roadsides, roadcuts, sand dunes. +
Flowering May–Oct. +
Fl. N. Amer. +
Illustrated +  and Endemic +
Mentzelia acuminata +
Mentzelia laevicaulis var. laevicaulis +
Mentzelia laevicaulis +
variety +