Chaenactis suffrutescens

A. Gray

Notes Compositae, 100. 1880.

Common names: Shasta pincushion
EndemicConservation concern
Synonyms: Chaenactis suffrutescens var. incana Stockwell
Treatment appears in FNA Volume 21. Treatment on page 404. Mentioned on page 403, 405.

Perennials or subshrubs (10–) 25–45 (–60) cm (sometimes cespitose, not matted); proximal indument (especially stems) persistent, whitish, densely lanuginose or pannose. Stems mostly 5–15+, usually erect. Leaves usually ± cauline, sometimes ± basal, 5–10 cm; largest blades lanceovate or deltate, ± plane, 1–2-pinnately lobed; primary lobes mostly 2–5 pairs, ± remote, ultimate lobes ± plane. Heads mostly 1–3 per stem. Peduncles ascending to erect, (5–) 10–20 cm. Involucres ± cylindric. Phyllaries: longest 14–18 mm; outer predominantly stipitate-glandular (other indument none or sparse), apices ± squarrose, pliant. Corollas 8.5–10 mm. Cypselae 7–9 mm; pappi: longest scales 7–9 mm. 2n = 12.


Phenology: Flowering May–early Sep.
Habitat: Loose scree, sand, rocky soils, slopes, drainages, usually on serpentine or other ultramafic deposits
Elevation: 700–2300 m

Discussion

Of conservation concern.

Chaenactis suffrutescens is known from the southern and eastern Klamath Ranges and northern Coast Ranges of Trinity and Siskiyou counties (nearly to Oregon). It is sometimes cultivated in rock gardens and may be found outside its native range. Small forms of C. suffrutescens from southern Trinity County approach C. nevadensis in habit (see discussion there).

Selected References

None.

Lower Taxa

None.

"longest" is not a number.

... more about "Chaenactis suffrutescens"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +, cymiform +  and corymbiform +
indeterminate +  and determinate +
James D. Morefield +
A. Gray +
decurrent +
Undefined sect. Macrocarphus +
compound +  and simple +
lobed;ovate;oblanceolate;ovate;oblanceolate;linear;deltate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
connate +  and distinct +
Shasta pincushion +
actinomorphic +
white +  and pinkish or cream +
stipitate-glandular +  and hairy +
0.85 cm8.5 mm <br />0.0085 m <br /> (1 cm10 mm <br />0.01 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
700–2300 m +
strigose +  and densely sericeous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
Loose scree, sand, rocky soils, slopes, drainages, usually on serpentine or other ultramafic deposits +
in more or less cymiform arrays +, singly +  and radiant +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
lobed +, plane +, deltate +  and lanceovate +
basal +  and cauline +
5 cm50 mm <br />0.05 m <br /> (?) +  and 10 cm100 mm <br />0.1 m <br /> (?) +
deltate +  and more or less lanceolate +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
dentate to pinnatifid or palmatifid +  and entire +
stipitate-glandular +
2-carpellate +
persistent +
coroniform +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Flowering May–early Sep. +
5 +  and 21 +
1.4 cm14 mm <br />0.014 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
pannose +  and lanuginose +
Notes Compositae, +
bearing subulate enations +, hairy +  and bristly +
knobby;convex;more or less flat +
distinct +
10 +  and 20 +
exalbuminous +
unequal +
Endemic +  and Conservation concern +
5 +  and 15 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Chaenactis suffrutescens var. incana +
Chaenactis suffrutescens +
Chaenactis sect. Macrocarphus +
species +
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 +
45 cm450 mm <br />0.45 m <br /> (60 cm600 mm <br />0.6 m <br />) +
25 cm250 mm <br />0.25 m <br /> (45 cm450 mm <br />0.45 m <br />) +