Psacalium

Cassini in F. Cuvier

in F. Cuvier, Dict. Sci. Nat. ed. 2, 43: 461. 1826.

Etymology: Provenance of name not stated by author
Treatment appears in FNA Volume 20. Treatment on page 621. Mentioned on page 543.

Perennials, [10–] 80–150 [–300] cm (rhizomes usually fleshy; plants hairy or tufted-hairy to unevenly glabrate). Stems single or clustered, erect. Leaves basal and cauline (proximal largest, cauline progressively smaller distally, bractlike); alternate; petiolate (petioles well defined, attached to blades at bases [attached near centers, leaves peltate]); blades palmately or pinnately nerved (and, usually, lobed), mostly ovate to elliptic [orbiculate, polygonal], ultimate margins entire or toothed, faces glabrous or sparsely [densely] hairy. Heads discoid, in corymbiform to paniculiform arrays. Calyculi of 1–3 [–5] bractlets (shorter than [equaling or longer than] phyllaries). Involucres cylindric to weakly turbinate, 1.5–4 [–10+] mm diam. Phyllaries persistent, mostly 5–8 [–17] in 1–2 series, erect, distinct, ovate, obovate, or oblong, subequal, margins scarious (tips greenish or gray to whitish, not black). Receptacles flat, foveolate (sometimes hairy), epaleate. Ray-florets 0. Disc-florets 5–8 [–80], bisexual, fertile; corollas white or ochroleucous [yellow, purplish], tubes longer than the campanulate or ± lacking throats, lobes 5, ascending to spreading, lance-linear; style-branches: stigmatic areas continuous, apices rounded-truncate. Cypselae mostly ± ellipsoid, ± compressed, [10–] 14–18-ribbed, glabrous or hairy; pappi [0] persistent (fragile), of 100–120, white or creamy, barbellulate bristles. x = 30.

Distribution

sw United States, mostly Mexico and Central America

Discussion

Species ca. 42 (1 in the flora).

... more about "Psacalium"
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
corymbiform +  and paniculiform +
indeterminate +  and determinate +
Theodore M. Barkley† +
Cassini in F. Cuvier +
decurrent +
mostly ovate;elliptic +
winged;nerved;ribbed +
creamy +  and white +
ochroleucous +  and white +
hairy +  and glabrous +
compressed +  and ellipsoid +
fertile +  and bisexual +
fertile +  and bisexual +
sw United States +  and mostly Mexico and Central America +
Provenance of name not stated by author +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
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 +
cauline +  and basal +
ascending;spreading +
lanceolate +  and lance-linear +
dentate to pinnatifid +  and entire +
2-carpellate +
persistent +
oblong +, obovate +  and ovate +
in F. Cuvier, Dict. Sci. Nat. ed. +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
conic;usually flat;convex +
robinson1973b +
exalbuminous +
appendaged +  and truncate +
papillate +
Compositae +
Psacalium +
Asteraceae tribe Senecioneae +
campanulate +
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 +