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.
Revision as of 21:51, 29 July 2020 by imported>Volume Importer
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
 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 />) +
60 cm600 mm <br />0.6 m <br /> (100 cm1,000 mm <br />1 m <br />) +