Solidago guiradonis

A. Gray

Proc. Amer. Acad. Arts 6: 543. 1865.

Common names: Guirado’s goldenrod
Endemic
Synonyms: Aster guiradonis (A. Gray) Kuntze
Treatment appears in FNA Volume 20. Treatment on page 143. Mentioned on page 140.

Plants 30–130 cm; caudices short, woody. Stems 1–10+, ascending-erect, glabrous, sometimes sparsely strigose in arrays. Leaves: sometimes rosettes of smaller leaves present at flowering; basal and proximal cauline tapering to elongate, winged petioles, bases nearly sheathing stems, blades linear-lanceolate, 50–200 (including petiole) × 4–9 mm, reduced distally, margins entire, apices acute, faces glabrous; mid and distal cauline sessile, blades linear, 25–100 × 3–7 mm, reduced distally and sometimes scalelike, margins entire. Heads 15–190, in racemiform to narrowly paniculiform arrays, rarely slightly secund, 12–45 × 2–11 cm, branches ascending. Peduncles 3–8 mm, glabrous or glabrate; bracteoles 3–6, grading into phyllaries. Involucres campanulate, 2.5–4 mm. Phyllaries in 3–4 series, linear-triangular, outer 1/3–1/2 length of inner, 1–3 × 0.4–0.9 mm, unequal, margins involute apically, midribs usually enlarged and translucent, inner with margins involute, apices sharply acute. Ray-florets 8–10; laminae 1.2–2.5 × ca. 0.75 mm. Disc-florets 10–21; corollas 2.8–4 mm, lobes 1 mm. Cypselae (obconic) 1–1.5 mm (4–7 ribs lighter than body), sparsely to moderately strigose; pappi 1.5–2 mm. 2n = 18.


Phenology: Flowering Aug–Oct.
Habitat: Near streams in asbestos-laden soils
Elevation: 600–900 m

Discussion

Solidago guiradonis is a rare species found only in the vicinity of San Carlos and San Benito peaks, San Benito and Fresno counties, California. It is similar to S. confinis but has much narrower leaves and smaller cypselae.

Selected References

None.

Lower Taxa

None.

"/3lengthofinner,1-3×0.4-0.9mm,unequal,marginsinvoluteapically,midribsusuallyenlargedandtranslucent,innermarginswithmarginsinvolute,apices" is not declared as a valid unit of measurement for this property.

... more about "Solidago guiradonis"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
racemiform +  and narrowly paniculiform +
indeterminate +  and determinate +
John C. Semple +  and Rachel E. Cook +
A. Gray +
not persisting +
decurrent +
Junceae +
compound +  and simple +
2.5 cm25 mm <br />0.025 m <br /> (10 cm100 mm <br />0.1 m <br />) +
scale-like;linear-lanceolate +
reduced +
3mm;7mm +
rugulose +  and muricate +
Guirado’s goldenrod +
not 2-lipped +  and actinomorphic +
yellow +  and white +
ampliate +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
compressed +, narrowly obconic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
usually much larger +
600–900 m +
resinous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Near streams in asbestos-laden soils +
indeterminate +
12 cm120 mm <br />0.12 m <br /> (45 cm450 mm <br />0.45 m <br />) +
heterogamous +  and homogamous +
cone--shaped +, wand +  and club-shaped +
2 cm20 mm <br />0.02 m <br /> (11 cm110 mm <br />0.11 m <br />) +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.17 cm1.7 mm <br />0.0017 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1.2mm;2.5mm +
cauline +, mid +, proximal +  and basal +
tapering;elongate +
erect;spreading +
triangular +  and narrowly lanceolate +
linear-lanceolate +  and oblong or ovate +
unequal +  and rarely subequal +
2-carpellate +
persistent +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
glabrate +  and glabrous +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
not persisting +
Flowering Aug–Oct. +
acute +  and linear-triangular +
ovate-oblanceolate +
ascending +  and spreading +
petiolate +  and attenuate-subpetiolate +
Proc. Amer. Acad. Arts +
bearing subulate enations +, hairy +  and bristly +
strigillose +  and glabrous +
8 +  and 10 +
exalbuminous +
ascending-erect +
1 +  and 10 +
appendaged +  and truncate +
papillate +  and smooth +
Aster guiradonis +
Solidago guiradonis +
Solidago subsect. Junceae +
species +
not persisting +
100 cm1,000 mm <br />1 m <br /> (200 cm2,000 mm <br />2 m <br />) +
5 cm50 mm <br />0.05 m <br /> (100 cm1,000 mm <br />1 m <br />) +