Baccharis vanessae

R. M. Beauchamp

Phytologia 46: 216, figs. 2, 3. 1980.

Common names: Encinitas false willow or baccharis
EndemicConservation concern
Treatment appears in FNA Volume 20. Treatment on page 34. Mentioned on page 25.

Shrubs, 50–200 cm (sprawling, densely stemmed from crowns, broomlike). Stems erect, slender, rounded, smooth, glabrous or stipitate-glandular proximal to heads. Leaves often withering and sparse by flowering; sessile; blades (1-nerved) filiform to linear-oblanceolate, 10–30 × 1–3 mm (slightly fleshy), bases narrowed, margins entire (revolute), apices acute (mucronate), faces glabrous, gland-dotted. Heads borne singly or in (pedunculate clusters) in loose paniculiform or racemiform arrays. Involucres funnelform; staminate 3–5 mm, pistillate 3–5 mm. Phyllaries lanceolate (not keeled), 1–4 mm, margins ciliate, chartaceous, apices acute to acuminate (abaxial faces scurfy-glandular). Staminate florets 15–22; corollas 4 mm. Pistillate florets ca. 25; corollas 2.5 mm. Cypselae 2–3 mm, 10-nerved, glabrous or ciliate along nerves; pappi 7–10 mm. 2n = 18.


Phenology: Flowering Oct.
Habitat: Chaparral, Torrey-pine forests
Elevation: 60–300 m

Discussion

Of conservation concern.

Baccharis vanessae is highly localized in chaparral remnants in relictual Torrey Pine forests of coastal San Diego County. It is distinguished from other species of Baccharis by its filiform leaves and delicate, ciliate phyllaries that reflex at maturity.

Selected References

None.

Lower Taxa

None.
... more about "Baccharis vanessae"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
racemiform +, paniculiform +  and loose +
indeterminate +  and determinate +
Scott D. Sundberg† +  and David J. Bogler +
R. M. Beauchamp +
narrowed +
3-nerved +  and 1-nerved +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
filiform;linear-oblanceolate +
1mm;3mm +
rugulose +  and muricate +
barbellulate +  and barbellate +
Encinitas false willow or baccharis +
not 2-lipped +  and actinomorphic +
whitish +, white +  and pale-yellow +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
ciliate +  and glabrous +
compressed +, obovoid +  and cylindric +
fertile +  and bisexual +
60–300 m +
resinous +
gland-dotted +
pistillate +  and staminate +
winged +  and beaked +
dispersed +
Chaparral, Torrey-pine forests +
racemiform +, corymbiform +  and paniculiform +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
pistillate +  and staminate +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
cylindric;campanulate or hemispheric +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
spreading-reflexed;spreading-reflexed +
less deltate +  and lanceovate +
hispid +  and glabrous +
2-carpellate +
brownish +, whitish +  and tawny +
persistent +
25 +  and 50 +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering Oct. +
lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
conic;tholiform;conic;tholiform;flat +
exalbuminous +
Endemic +  and Conservation concern +
1 (?) +  and 20 (?) +
resinous +
rounded +
slender +
appendaged +  and truncate +
papillate +  and smooth +
Compositae +
Baccharis vanessae +
Baccharis +
species +