Chaenactis alpigena

Sharsmith

Contr. Dudley Herb. 4: 319, plate 12, fig. a. 1955.

Common names: Sharsmith or southern Sierra or mountain pincushion
Endemic
Treatment appears in FNA Volume 21. Treatment on page 408. Mentioned on page 404, 405.

Perennials, 2–7 cm (cespitose or ± matted); proximal indument thinning with age, grayish to yellowish, lanuginose (sometimes glabrescent). Stems mostly 5–15+, erect to prostrate. Leaves basal, 1–2.5 (–3.5) cm; largest blades linear or broadly elliptic to slightly obovate, ± plane or 3-dimensional, (0–) 1–2-pinnately or -subpalmately lobed; primary lobes 2–7 pairs, ± congested, ultimate lobes ± plane to involute and twisted. Heads 1 per stem. Peduncles mostly prostrate, (0.5–) 2–7 (–10) cm. Involucres obconic to ± cylindric. Phyllaries: longest 9–14 mm; outer ± lanuginose, not stipitate-glandular, apices erect, ± rigid. Corollas 5.5–8 mm. Cypselae 5–8 mm (eglandular); pappi: longest scales 5–8 mm (lengths 0.9–1 times corollas).


Phenology: Flowering Jul–Sep.
Habitat: Open, loose, subalpine to alpine granitic sand, gravel, scree
Elevation: 2200–3900 m

Discussion

Chaenactis alpigena is known from the central and southern Sierra Nevada and adjacent northern White Mountains. It is sometimes cultivated in rock gardens and may be found beyond its native range. It appears to be sister to C. thompsonii and/or C. evermannii.

Chaenactis alpigena shows clinal variation; northward the leaves tend to be ± plane, (0–)1-subpalmately lobed, lobes 2–5 pairs, ± plane; southward the leaves tend to be ± 3-dimensional, 1–2-pinnately lobed, primary lobes 4–7 pairs, ultimate lobes ± involute, twisted. Leaves of intermediate forms tend to be ± plane, 1-pinnately lobed, lobes mostly 4–5 pairs, ± plane. The variation is gradual and does not support recognition of infraspecific taxa. Throughout its range, occasional plants of C. alpigena are green and glabrate.

Selected References

None.

Lower Taxa

None.

"longest" is not a number.

... more about "Chaenactis alpigena"
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 +
Sharsmith +
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 +
Sharsmith or southern Sierra or mountain pincushion +
actinomorphic +
white +  and pinkish or cream +
stipitate-glandular +  and hairy +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +  and Nev. +
2200–3900 m +
strigose +  and densely sericeous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
Open, loose, subalpine to alpine granitic sand, gravel, scree +
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 />) +
obconic;more or less cylindric +
broadly elliptic to slightly obovate +  and linear +
lobed +, 3-dimensional +  and plane +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +  and 2.5 cm25 mm <br />0.025 m <br /> (?) +
deltate +  and more or less lanceolate +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
dentate to pinnatifid or palmatifid +  and entire +
not stipitate-glandular +  and lanuginose +
2-carpellate +
persistent +
coroniform +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Flowering Jul–Sep. +
5 +  and 21 +
0.9 cm9 mm <br />0.009 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
grayish +  and yellowish +
Contr. Dudley Herb. +
bearing subulate enations +, hairy +  and bristly +
knobby;convex;more or less flat +
distinct +
10 +  and 20 +
exalbuminous +
unequal +
erect +  and prostrate +
5 +  and 15 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Chaenactis alpigena +
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 />) +
less plane;involute +
toothed +  and entire +
70 cm700 mm <br />0.7 m <br /> (200 cm2,000 mm <br />2 m <br />) +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +