Chaenactis glabriuscula var. glabriuscula

Synonyms: Chaenactis glabriuscula var. curta (Nuttall) H. M. Hall Chaenactis glabriuscula var. tenuifolia Chaenactis tenuifolia
Treatment appears in FNA Volume 21. Treatment on page 413. Mentioned on page 411, 412.

Plants 10–60 cm; proximal indument grayish, ± arachnoid. Stems mostly 1–5, ascending to erect; branches proximal and, often, distal. Leaves basal (withering) and cauline, 3–8 cm; largest blades ± plane to 3-dimensional, scarcely succulent, 1 (–2) -pinnately lobed; primary lobes 2–7 pairs, remote to ± congested, ultimate lobes plane, twisted, involute, or terete. Heads 2–20+ per stem. Peduncles 1–4 (–10) cm. Involucres ± hemispheric to obconic. Phyllaries: longest 5–7 × 1–2 mm; outer (at least medially) ± arachnoid-sericeous and, often, ± stipitate-glandular in fruit. Florets: inner corollas 4–6 mm. Cypselae 3–5.5 mm; pappi of (1–) 4 scales in 1 series, longest scales mostly 2–4 mm, lengths 0.4–0.7 times corollas. 2n = 12.


Phenology: Flowering Feb–Jun.
Habitat: Dry slopes, sandy places, openings in chaparral, woodlands
Elevation: 100–2300 m

Distribution

V21-1035-distribution-map.gif

Calif., Mexico (Baja California)

Discussion

Variety glabriuscula is known mainly in and west of the Peninsular Ranges and adjacent desert edges, inland from the coast; it also extends to Santa Rosa Island. Northward it intergrades with vars. megacephala and lanosa; near the coast it intergrades with var. orcuttiana. Forms sometimes recognized as var. tenuifolia are distinctive in the filiform leaf segments but merge seamlessly with the remainder of var. glabriuscula.

Selected References

None.

Lower Taxa

None.

"-0.7timescorollas" is not declared as a valid unit of measurement for this property.

not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +, cymiform +  and corymbiform +
indeterminate +  and determinate +
James D. Morefield +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
decurrent +
compound +  and simple +
lobed;ovate;oblanceolate;ovate;oblanceolate;linear;deltate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
connate +  and distinct +
actinomorphic +
stipitate-glandular +  and hairy +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +  and Mexico (Baja California) +
100–2300 m +
strigose +  and densely sericeous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
Dry slopes, sandy places, openings in chaparral, woodlands +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
less hemispheric;obconic +
lobed +  and plane +
cauline +  and basal +
3 cm30 mm <br />0.03 m <br /> (?) +  and 8 cm80 mm <br />0.08 m <br /> (?) +
deltate +  and more or less lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
dentate to pinnatifid or palmatifid +  and entire +
stipitate-glandular +  and arachnoid-sericeous +
acute +  and blunt +
2-carpellate +
persistent +
coroniform +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
glabrescent +, lanuginose +, arachnoid-sericeous +, villous +  and stipitate-glandular +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering Feb–Jun. +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
5 +  and 21 +
0.45 cm4.5 mm <br />0.0045 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
remote +  and more or less congested +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
knobby;convex;more or less flat +
distinct +
unequal +
exalbuminous +
unequal +
5 (?) +  and 12 (?) +
ascending +  and erect +
1 +  and 5 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Chaenactis glabriuscula var. curta +, Chaenactis glabriuscula var. tenuifolia +  and Chaenactis tenuifolia +
Chaenactis glabriuscula var. glabriuscula +
Chaenactis glabriuscula +
variety +
cylindric +
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
1 cm10 mm <br />0.01 m <br /> (80 cm800 mm <br />0.8 m <br />) +
terete;involute;terete;involute;plane +
toothed +  and entire +
70 cm700 mm <br />0.7 m <br /> (200 cm2,000 mm <br />2 m <br />) +
5 cm50 mm <br />0.05 m <br /> (70 cm700 mm <br />0.7 m <br />) +