Xylorhiza confertifolia

(Cronquist) T. J. Watson

Brittonia 29: 207. 1977.

Common names: Henrieville woody-aster
EndemicConservation concern
Basionym: Machaeranthera glabriuscula var. confertifolia Cronquist Leafl. W. Bot. 10: 11. 1963
Synonyms: Machaeranthera confertifolia (Cronquist) Cronquist
Treatment appears in FNA Volume 20. Treatment on page 408. Mentioned on page 406.

Subshrubs 10–15 (–23) cm. Stems branched mostly in proximal 3/4 (leaves numerous, crowded, internodes averaging 2–3 mm), finely stipitate-glandular or nearly glabrous. Leaf-blades linear, 1–2.5 mm wide, bases attenuate, not clasping, margins involute, entire, faces puberulent and/or minutely stipitate-glandular. Peduncles 2–14 cm. Involucres 8–12 × 10–16 (–20) mm. Ray-florets 4–14; corollas white. Style-branch appendages ± equal stigmatic lines. 2n = 12.


Phenology: Flowering May–Jul.
Habitat: Barren slopes in alkaline clay, pinyon-juniper
Elevation: 1400–2300 m

Discussion

Of conservation concern.

Xylorhiza confertifolia is known form Garfield and Kane counties.

Selected References

None.

Lower Taxa

None.
... more about "Xylorhiza confertifolia"
stipitate-glandular +, sparsely tomentose +  and villous +
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
Guy L. Nesom +
(Cronquist) T. J. Watson +
attenuate +
Machaeranthera glabriuscula var. confertifolia +
linear;lanceolate or oblanceolate oblong or narrowly elliptic +
rugulose +  and muricate +
Henrieville woody-aster +
not 2-lipped +  and actinomorphic +
fusiform +  and linear or ovoid more or less compressed +
fertile +  and bisexual +
fertile +  and bisexual +
1400–2300 m +
stipitate-glandular +  and puberulent +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Barren slopes in alkaline clay, pinyon-juniper +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
1.6 cm16 mm <br />0.016 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate;hemispheric +
1 cm10 mm <br />0.01 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
subpetiolate +  and sessile +
triangular +
2-carpellate +
persistent +
2 cm20 mm <br />0.02 m <br /> (14 cm140 mm <br />0.14 m <br />) +
Flowering May–Jul. +
lanceolate +
bearing subulate enations +, hairy +  and bristly +
concave;usually flat;conic +
exalbuminous +
Endemic +  and Conservation concern +
glabrous +  and stipitate-glandular +
appendaged +  and truncate +
papillate +  and smooth +
Machaeranthera confertifolia +
Xylorhiza confertifolia +
Xylorhiza +
species +
shorter to longer +
15 cm150 mm <br />0.15 m <br /> (23 cm230 mm <br />0.23 m <br />) +