Chaenactis glabriuscula var. lanosa

(de Candolle) H. M. Hall

Univ. Calif. Publ. Bot. 3: 192. 1907.

Common names: Sand buttons South Coast Ranges pincushion
Endemic
Basionym: Chaenactis lanosa de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 659. 1836
Synonyms: Chaenactis glabriuscula var. denudata (Nuttall) Munz
Treatment appears in FNA Volume 21. Treatment on page 412. Mentioned on page 411, 413.

Plants 8–15 (–35) cm; proximal indument whitish, ± densely lanuginose. Stems mostly 1–12, decumbent to erect; branches none or strictly proximal. Leaves ± basal (persistent), 2–10 cm; largest blades ± plane or terete, scarcely succulent, 0–1-pinnately lobed; lobes 1–2 (–5) pairs, remote, ± plane to terete. Heads 1 (–3) per stem. Peduncles 8–20 (–30) cm. Involucres ± hemispheric to obconic. Phyllaries: longest 6–8 × 1–2 mm; outer ± densely lanuginose in fruit. Florets: inner corollas 5–6.5 mm. Cypselae 4–6 mm; pappi of 4 scales in 1 series, longest scales mostly 4–6 mm, lengths 0.8–0.9 (–1) times corollas. 2n = 12.


Phenology: Flowering Mar–June.
Habitat: Deep loose sand (typical forms, intermediate forms also in habitats of other vars.), openings in chaparral
Elevation: 10–700(–1400) m

Discussion

Variety lanosa is known mainly from the Coast Ranges of central California. Most (but not all) specimens from farther south (Pacific coast and Santa Rosa Island) and southeast (Transverse Ranges to Sonoran Desert edges) are intermediate with vars. megacephala or glabriuscula; these are sometimes recognized as var. denudata. Northward, intermediates with var. heterocarpha are known.

Selected References

None.

Lower Taxa

None.

"-0.9(-1)timescorollas" 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) H. M. Hall +
decurrent +
Chaenactis lanosa +
compound +  and simple +
lobed;ovate;oblanceolate;ovate;oblanceolate;linear;deltate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
connate +  and distinct +
Sand buttons +  and South Coast Ranges pincushion +
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 +
10–700(–1400) m +
strigose +  and densely sericeous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
Deep loose sand (typical forms, intermediate forms also in habitats of other vars.), openings in chaparral +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
less hemispheric;obconic +
lobed +, terete +  and plane +
2 cm20 mm <br />0.02 m <br /> (?) +  and 10 cm100 mm <br />0.1 m <br /> (?) +
less plane +  and terete +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
dentate to pinnatifid or palmatifid +  and entire +
acute +  and blunt +
2-carpellate +
persistent +
coroniform +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
glabrescent +, lanuginose +, arachnoid-sericeous +, villous +  and stipitate-glandular +
8 cm80 mm <br />0.08 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Flowering Mar–June. +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 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 +
Univ. Calif. Publ. Bot. +
bearing subulate enations +, hairy +  and bristly +
knobby;convex;more or less flat +
distinct +
unequal +
exalbuminous +
unequal +
5 (?) +  and 12 (?) +
decumbent +  and erect +
1 +  and 12 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Chaenactis glabriuscula var. denudata +
Chaenactis glabriuscula var. lanosa +
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 />) +
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 />) +