Noccaea fendleri subsp. siskiyouensis

(P. K. Holmgren) Al-Shehbaz & M. Koch

Syst. Bot. 29: 383. 2004.

Basionym: Thlaspi montanum var. siskiyoense P. K. Holmgren Mem. New York Bot. Gard. 21(2): 84. 1971
Treatment appears in FNA Volume 7. Treatment on page 603. Mentioned on page 601, 602.
Revision as of 11:35, 30 July 2020 by imported>Volume Importer
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Stems (0.6–) 0.7–1.6 (–2.4) dm. Basal leaves: petiole differentiated from blade, (1.7–) 2–3.6 (–4) times longer than blade; blade ovate to oblong, 4–8 (–9) mm wide, base cuneate. Cauline leaves 2–6. Racemes lax to compact. Fruiting pedicels horizontal or slightly descending, forming an angle 80º or more with rachis. Flowers: petals white, 3.8–6 × 1.2–2.2 (–2.9) mm. Fruits often strongly winged, obovate to obdeltate, (4–) 4.8–7 (–8) × (3–) 3.5–5.5 (–6) mm, 1–2 times as long as wide, apex truncate to strongly emarginate; style (0.8–) 1–2 mm. Seeds 2–4 per fruit. 2n = 14.


Phenology: Flowering Apr–Jun.
Habitat: Moist, open rocky serpentine slopes
Elevation: 300-500 m

Discussion

Subspecies siskiyouensis is known from Curry, Douglas, and Josephine 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.

descending +  and horizontal +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
truncate +  and strongly emarginate +
obtuse +  and subacute +
Ihsan A. Al-Shehbaz +
(P. K. Holmgren) Al-Shehbaz & M. Koch +
subamplexicaul +
cuneate +
Thlaspi montanum var. siskiyoense +
appendaged +  and unappendaged +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
dissected +, repand +, sinuate +, crenate +  and dentate +
ovate;oblong +
much smaller +  and reduced +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
well-developed +
differentiated +
emarginate +  and entire +
300-500 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
0.2 cm2 mm <br />0.002 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
actinomorphic +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.48 cm4.8 mm <br />0.0048 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
obovate +  and obdeltate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
angustiseptate +
Moist, open rocky serpentine slopes +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
dentate +  and entire +
dentate;denticulate;dentate;denticulate;entire +
1 +, 4 +  and 2 +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.29 cm2.9 mm <br />0.0029 m <br />) +
3.8mm;6mm +
rudimentary +
flaring +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
(1.7-)2-3.6(-4) times longer than blade +
0.4 cm4 mm <br />0.004 m <br /> (7.3 cm73 mm <br />0.073 m <br />) +
differentiated +
Flowering Apr–Jun. +
trinucleate +  and 3(-11)-colpate +
horizontal +  and ascending +
slender +
0.25 cm2.5 mm <br />0.0025 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
mucilaginous +
aseriate +, biseriate +  and uniseriate +
not +  and mucilaginous +
2 +  and 4 +
ovoid +  and compressed +
0.11 cm1.1 mm <br />0.0011 m <br /> (?) +  and 0.21 cm2.1 mm <br />0.0021 m <br /> (?) +
persistent +  and caducous +
distinct +
ovate +  and oblong +
0.05 cm0.5 mm <br />5.0e-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 +, unbranched +  and simple +
procumbent +  and decumbent +
ascending +  and erect +
2-lobed +, entire +, conical +  and capitate +
subsessile +, sessile +  and petiolate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Thlaspi montanum var. fendleri +
Noccaea fendleri subsp. siskiyouensis +
Noccaea fendleri +
subspecies +
eglandular +, peltate +, malpighiaceous +, dendritic +, sessile +, stalked +, simple +  and unicellular +
scale-like +  and forked +
pubescent +  and glabrous +
anastomosing +
rhizomatous +, taprooted +, scapose +  and not +
perennial +, biennial +  and annual +
subshrub +  and herb +
aquatics +  and terrestrial +
glabrous +  and pubescent +