Sibaropsis hammittii

S. Boyd & T. S. Ross

Madroño 44: 30, figs. 2–4. 1997.

Treatment appears in FNA Volume 7. Treatment on page 694.

Stems 0.5–2 dm, unbranched or branched (several, ascending) near base. Basal leaves soon withered. Cauline leaves: blade somewhat fleshy, narrowly linear, (1–) 1.5–3 (–4.5) cm × 0.5–1 mm. Fruiting pedicels 2.5–4 mm. Flowers: sepals 2.8–3.2 × 0.5–1 mm; petals 8.5–10 × 2–2.5 mm, margins not crisped, claw attenuate to base, 5–6 mm, longer than blade; filaments: abaxial and lateral pairs distinct, shorter, adaxial pair ± connate, 4.5–5 mm; anthers ca. 0.8 mm. Fruits erect, (1.5–) 2–2.5 cm × 0.7–0.9 mm; style (1.5–) 3–4.5 mm. Seeds reddish to dark olive-brown, 1–1.3 × 0.5–0.6 mm. 2n = 28.


Phenology: Flowering Mar–Apr.
Habitat: Patches of open, relatively moist, heavy clay soil dominated by native grasses, geophytes, and annuals
Elevation: 700-1100 m

Discussion

Of conservation concern.

Sibaropsis hammittii is known from two areas, separated by about 120 km, in the Peninsular Ranges of southern California: the Santa Ana Mountains in Riverside County, and the Viejas and Poser mountains in San Diego County.

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 "Sibaropsis hammittii"
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
ovate-oblong +
0.8 cm8 mm <br />0.008 m <br /> (?) +
Steve Boyd +
S. Boyd & T. S. Ross +
appendaged +  and unappendaged +
not rosulate +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
not +  and auriculate +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
dissected +, repand +, sinuate +, crenate +  and dentate +
much smaller +  and reduced +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
urceolate +, campanulate +  and tubular +
branched +  and simple +
sessile +  and petiolate +
well-developed +
distinct +
attenuate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
well-differentiated +
emarginate +  and entire +
incumbent +  and accumbent +
700-1100 m +
straight +  and curved +
not winged +  and unappendaged +
connate +  and distinct +
zygomorphic +  and actinomorphic +
latiseptate +  and sessile +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
4-angled +  and terete +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
Patches of open, relatively moist, heavy clay soil dominated by native grasses, geophytes, and annuals +
alternate +, not +  and rosulate +
cauline +  and basal +
connate +  and distinct +
decurrent +
not crisped +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
unequal +
pink-lavender +  and light purple +
8.5mm;10mm +
rudimentary +
spatulate +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Flowering Mar–Apr. +
trinucleate +  and 3(-11)-colpate +
slender +
mucilaginous +
aseriate +, uniseriate +  and biseriate +
not +  and mucilaginous +
reddish +  and dark olive-brown +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
oblong +  and flattened +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
not basally +  and saccate +
persistent +  and caducous +
distinct +
subsaccate +, lanceolate +  and ovate-oblong +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 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 +
subentire +
subsessile +, sessile +  and petiolate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
persistent +
distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Cruciferae +
Sibaropsis hammittii +
Sibaropsis +
species +
dendritic +  and simple +
coiled +, 1-7-veined +  and veined +
anastomosing +
glabrate +  and glabrous +
perennial +, biennial +  and annual +
subshrub +  and shrub +
aquatics +  and terrestrial +
glabrous +  and pubescent +