Psacalium decompositum

(A. Gray) H. Robinson & Brettell

Phytologia 27: 260. 1973.

Illustrated
Basionym: Cacalia decomposita A. Gray Smithsonian Contr. Knowl. 5(6): 99. 1853
Synonyms: Mesadenia decomposita (A. Gray) Standley Odontotrichum decompositum (A. Gray) Rydberg
Treatment appears in FNA Volume 20. Treatment on page 622.

Perennials; caudices thick, tough. Stems subscapiform, densely hairy proximally, sparsely hairy to subglabrous distally. Leaves mostly basal; petiole lengths ± equaling blades; blades ovate or elliptic, 20–30 (–40) cm, nearly as wide, deeply 3–4-pinnatisect, ultimate lobes narrowly triangular to oblong, acute; mid and distal leaves progressively smaller, bractlike. Calyculi: bractlets 2–4 mm. Phyllaries (4–) 5–7 mm. Corollas 7–9 mm. Cypselae 4–5 mm; pappi 4–7 mm. 2n = 60.


Phenology: Flowering summer–early fall.
Habitat: Shady sites, open woodlands
Elevation: 1700–2600 m

Distribution

V20-1394-distribution-map.gif

Ariz., N.Mex., Mexico (Chihuahua), Mexico (Durango), Mexico (Sonora)

Discussion

Psacalium decompositum barely enters the flora area in Arizona and New Mexico.

Selected References

None.

Lower Taxa

None.

"thick" is not a number."wide" is not a number.

... more about "Psacalium decompositum"
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
Theodore M. Barkley† +
(A. Gray) H. Robinson & Brettell +
decurrent +
Cacalia decomposita +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
acute;elliptic;ovate +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
winged;nerved;ribbed +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
creamy +  and white +
ochroleucous +  and white +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
hairy +  and glabrous +
compressed +  and ellipsoid +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, N.Mex. +, Mexico (Chihuahua) +, Mexico (Durango) +  and Mexico (Sonora) +
1700–2600 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Shady sites, open woodlands +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
cylindric;weakly turbinate +
ascending;spreading +
lanceolate +  and lance-linear +
dentate to pinnatifid +  and entire +
2-carpellate +
persistent +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Flowering summer–early fall. +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
oblong +, obovate +  and ovate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
conic;usually flat;convex +
exalbuminous +
Illustrated +
appendaged +  and truncate +
papillate +
Mesadenia decomposita +  and Odontotrichum decompositum +
Psacalium decompositum +
Psacalium +
species +
campanulate +
narrowly triangular;oblong +
toothed +  and entire +
150 cm1,500 mm <br />1.5 m <br /> (300 cm3,000 mm <br />3 m <br />) +
80 cm800 mm <br />0.8 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
vine +, tree +, shrub +  and subshrub +