Streptanthus bernardinus

(Greene) Parish

Pl. World 20: 216. 1917.

Basionym: Agianthus bernardinus Greene Leafl. Bot. Observ. Crit. 1: 228. 1906
Synonyms: Agianthus jacobaeus Greene Streptanthus campestris var. bernardinus (Greene) I. M. Johnston Streptanthus campestris var. jacobaeus (Greene) Jepson
Treatment appears in FNA Volume 7. Treatment on page 705. Mentioned on page 703.

Perennials; (caudex woody, often elevated); (glaucous), glabrous, (petioles and sepal apices pubescent). Stems unbranched or branched (few), 2.5–8.6 dm. Basal leaves not rosulate; petiolate (petioles ciliate); blade oblanceolate to spatulate, 2–8 cm (7–-25 mm wide), margins remotely dentate apically. Cauline leaves: blade ovate to lanceolate, 2–10 cm × 5–28 mm (smaller distally), base amplexicaul, margins entire, (apex acute to acuminate). Racemes ebracteate, (lax in bud). Fruiting pedicels divaricate-ascending, (straight), 4–7.5 mm. Flowers: calyx campanulate; sepals (ascending), pale-yellow to white, (broadly oblong to ovate) 5–9 mm, not keeled; petals white, 7–11 mm, blade 2–4 × 1–1.3 mm, margins not crisped, claw 6–9 mm, wider than blade; stamens nearly tetradynamous; filaments: median pairs (distinct), 6.5–8.5 mm, lateral pair 4.5–5.5 mm; anthers (all) fertile, 3.5–4.5 mm; gynophore 0.5–1.5 mm. Fruits ascending to spreading, smooth, straight or curved, flattened, 5–12.7 cm × 1.5–3 mm; valves each with obscure midvein (at least distally); replum straight; ovules 36–56 per ovary; style 0.8–2.5 mm; stigma subentire. Seeds oblong, 2–3 × 1.4–2 mm; wing 0.1–0.2 mm wide at apex. 2n = 28.


Phenology: Flowering Jun–Aug.
Habitat: Dry open pine or cypress woods, chaparral
Elevation: 1200-2500 m

Distribution

V7 1214-distribution-map.gif

Calif., Mexico (Baja California)

Discussion

Streptanthus bernardinus is known from San Bernardino and San Diego counties; in Baja California it is restricted to Sierra Juárez and Sierra San Pedro Mártir.

The chromosome number 2n = 14, reported by R. C. Rollins (1993) and by R. E. Buck et al. (1993), must be an error for n = 14. No other species of Streptanthus or its immediate generic relatives has such a low number.

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.

... more about "Streptanthus bernardinus"
linear +  and oblong +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Ihsan A. Al-Shehbaz +
(Greene) Parish +
Agianthus bernardinus +
appendaged +  and unappendaged +
not +  and auriculate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
lyrate-pinnatifid +, dentate +  and entire +
dissected +, repand +, sinuate +, crenate +  and dentate +
ovate;lanceolate +
much smaller +  and reduced +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
campanulate +
branched +  and simple +
petiolate +  and sessile +
well-developed +
distinct +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
differentiated +
emarginate +  and entire +
Calif. +  and Mexico (Baja California) +
1200-2500 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
lateral +  and median +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
zygomorphic +  and actinomorphic +
pale-yellow;white +
not keeled +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
latiseptate +, stipitate +  and subsessile +
curved +  and straight +
5 cm50 mm <br />0.05 m <br /> (12.7 cm127 mm <br />0.127 m <br />) +
ascending +  and spreading +
flattened +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Dry open pine or cypress woods, chaparral +
sessile +  and petiolate +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
entire +  and dentate +
not crisped +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
unequal +
rudimentary +
oblong +  and ovate +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
Flowering Jun–Aug. +
trinucleate +  and 3(-11)-colpate +
divaricate-ascending +
stout +  and slender +
0.4 cm4 mm <br />0.004 m <br /> (0.75 cm7.5 mm <br />0.0075 m <br />) +
mucilaginous +
aseriate +, uniseriate +  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 />) +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
persistent +  and caducous +
distinct +
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 +
ascending +  and erect +
subentire +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Agianthus jacobaeus +, Streptanthus campestris var. bernardinus +  and Streptanthus campestris var. jacobaeus +
Streptanthus bernardinus +
Streptanthus +
species +
dendritic +  and simple +
coiled +, 1-7-veined +  and veined +
pubescent +  and glabrous +
anastomosing +
perennial +, biennial +  and annual +
subshrub +  and shrub +
aquatics +  and terrestrial +
glabrous +  and pubescent +
0.1mm;0.2mm +