Nevada holmgrenii

(Rollins) N. H. Holmgren

Brittonia 56: 241. 2004.

Basionym: Smelowskia holmgrenii Rollins Contr. Gray Herb. 171: 50. 1950
Treatment appears in FNA Volume 7. Treatment on page 414.

Stems (0.8–) 1–2.5 (–3.2) dm, glabrous. Basal leaves: petiole to 2 cm (ciliate, trichomes to 0.4 mm); blade (rigid) narrowly to broadly oblanceolate, 1–5 cm × 3–6 (–9) mm, base attenuate to cuneate, apex acute, surfaces glabrous or, rarely, margins ciliate to apex. Cauline leaves 3–5; blade linear to lanceolate, (0.6–) 1–1.8 (–2.5) cm × 1–3 mm, surfaces glabrous, sometimes margins ciliate, apex acute. Racemes somewhat lax in fruit. Fruiting pedicels sometimes appressed to rachis, straight, 3–9 mm, glabrous. Flowers: sepals 1.7–2.5 × 0.8–1.5 mm; petals 2.8–4 × 1.5–2 mm, attenuate to clawlike base; filaments 1.5–2.5 mm; anthers 0.4–0.6 mm. Fruits ascending to erect, (0.7–) 1–1.8 (–2.4) cm × 1–1.5 mm; style 0.1–0.4 mm. Seeds 2–3 × 0.7–1 mm. 2n = 14.


Phenology: Flowering Jun–Jul.
Habitat: Rock outcrops, crevices, metamorphic rocks, cracks, ledges, talus of schist
Elevation: 1900-3500 m

Discussion

Of conservation concern.

Nevada holmgrenii is restricted to central Nevada in Humboldt, Lander, Nye, Pershing, and White Pine counties.

Selected References

None.

Lower Taxa

None.

"elongated" is not a number."thick" is not a number."dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.

... more about "Nevada holmgrenii"
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Ihsan A. Al-Shehbaz +
(Rollins) N. H. Holmgren +
attenuate +  and cuneate +
Smelowskia holmgrenii +
appendaged +  and unappendaged +
1.8 cm18 mm <br />0.018 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
not +  and auriculate +
1 cm10 mm <br />0.01 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
dissected +, repand +, sinuate +, crenate +  and dentate +
linear;lanceolate +
much smaller +  and reduced +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
indistinct +
not +  and differentiated +
emarginate +  and entire +
incumbent +  and accumbent +
1900-3500 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
actinomorphic +
oblong-ovate +
subsessile +  and sessile +
1.8 cm18 mm <br />0.018 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
ascending +  and erect +
terete +, torulose +, linear +  and linear-lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Rock outcrops, crevices, metamorphic rocks, cracks, ledges, talus of schist +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
pinnatifid +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
2.8mm;4mm +
rudimentary +
attenuate +  and clawlike +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering Jun–Jul. +
trinucleate +  and 3(-11)-colpate +
ascending +  and suberect +
slender +
mucilaginous +
aseriate +, sub-biseriate +  and biseriate +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +  and caducous +
distinct +
spreading +, ascending +  and erect +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
reduced +
latiseptate +, schizocarpic +, samaroid +  and lomentaceous +
indehiscent +  and dehiscent +
angustiseptate +, flat +, angled +, terete +, torulose +, not +, segmented +  and nutletlike +
tetradynamous +
branched +  and unbranched +
procumbent +  and decumbent +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
glabrous +  and , +
Cruciferae +
Nevada holmgrenii +
species +
coiled +, 1-7-veined +  and veined +
anastomosing +
glabrous +  and pubescent +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +