Asanthus

R. M. King & H. Robinson

Phytologia 24: 66. 1972.

Etymology: Asa, honoring American botanist Asa Gray, 1810–1888, and Greek anthos, flower
Treatment appears in FNA Volume 21. Treatment on page 509. Mentioned on page 460, 507.
 TaxonIllustrator 
FNA21 P77 Asanthus squamulosus.jpegAsanthus squamulosus
Malperia tenuis
Pleurocoronis pluriseta
Linny Heagy
Linny Heagy
Linny Heagy

Perennials or subshrubs, 30–60 (–100) cm. Stems erect, much branched. Leaves cauline; mostly opposite (distal sometimes alternate); ± sessile [petiolate]; blades 1-nerved (or nerves parallel, mostly linear to filiform [lanceolate] (distal usually filiform to scalelike), canescent, often with axillary, ± 4-ranked, canescent, fascicles of scale-leaves), margins entire, faces glabrous or puberulent, usually glanddotted. Heads discoid, in narrow, racemiform [corymbiform to paniculiform] arrays. Involucres ± obconic, 4–5 mm diam. Phyllaries persistent, 20–25 in 4–8 series, not notably nerved, lanceovate to oblong, unequal (herbaceous to scarious, becoming indurate). Receptacles flat, epaleate. Florets 8–14; corollas whitish, throats narrowly cylindric (lengths 6–8 times diams.); styles: bases not enlarged, glabrous, branches narrowly clavate (distally dilated, not notably papillose). Cypselae narrowly prismatic, (9–) 10-ribbed, scabrellous on ribs; pappi persistent, of 20–100 barbellate (at least distally) bristles in 1–3 series.

Distribution

sw United States, w Mexico

Discussion

Species 3 (1 in the flora).

Asanthus has been included within Steviopsis (see discussion under 404. Brickelliastrum).

Selected References

None.

"fine" is not a number.

... more about "Asanthus"
not tailed +, truncate +, rounded +  and obtuse +
scarious +
usually ovate +  and lanceolate +
usually terete +  and clavate +
indeterminate +  and determinate +
Guy L. Nesom +
R. M. King & H. Robinson +
decurrent +
not enlarged +
compound +  and simple +
fascicles +, 4-ranked +  and parallel +
dissected +, lobed +, toothed +  and entire +
mostly linear;filiform +
papillate +  and rugose +
(4-)5-angled;10-ribbed +
scabrellous +
prismatic +
fertile +  and bisexual +
sw United States +  and w Mexico +
Asa, honoring American botanist Asa Gray, 1810–1888, and Greek anthos, flower +
puberulent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
in usually determinate , rarely indeterminate , arrays +  and singly +
indeterminate +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
lanceolate +  and lance-linear +
fascicles +, 4-ranked +  and parallel +
2-carpellate +
persistent +
20 +  and 25 +
bearing subulate enations +, hairy +  and bristly +
conic;spheric;usually flat;convex +
exalbuminous +
appendaged +  and truncate +
hirsutulous +
papillate +
Compositae +
Asanthus +
Asteraceae tribe Eupatorieae +
cylindric +
60 cm600 mm <br />0.6 m <br /> (100 cm1,000 mm <br />1 m <br />) +
30 cm300 mm <br />0.3 m <br /> (60 cm600 mm <br />0.6 m <br />) +