Xerochrysum

Tzvelev

Novosti Sist. Vyssh. Rast. 27: 151. 1990.

Etymology: Greek xeros, dry, and chrysos, gold, perhaps alluding to phyllaries
Synonyms: Bracteantha Anderberg & Haegi
Treatment appears in FNA Volume 19. Treatment on page 427. Mentioned on page 59, 387.
 TaxonIllustrator 
FNA19 P46 Helichrysum petiolare.jpegHelichrysum petiolare
Anaphalis margaritacea
Xerochrysum bracteatum
Barbara Alongi
Barbara Alongi
Barbara Alongi

Annuals, biennials, or perennials, 20–90+ cm; taprooted (rhizomatous, not stoloniferous). Stems usually 1, erect (rarely 1–2 or more times branched; usually arachnose and ± stipitate-glandular). Leaves cauline; alternate; sessile (or nearly so); blades elliptic or spatulate to oblanceolate, lanceolate, or linear, bases cuneate, margins entire, faces concolor, usually arachnose and ± stipitate-glandular. Heads disciform, borne singly or (2–3) in loose, corymbiform arrays. Involucres ± hemispheric, 10–30 mm. Phyllaries in 3–8+ series, usually yellow or brown to purple, sometimes white or pinkish (opaque, stereomes not glandular), unequal, usually chartaceous toward tips (spreading at flowering, deflexed in age). Receptacles flat, glabrous, epaleate. Peripheral (pistillate) florets (0–) 25–50 (fewer than bisexual); corollas yellow. Inner (bisexual) florets 200–400; corollas yellow (lobes erect). Cypselae columnar to ± prismatic (4-angled), faces smooth, glabrous; pappi readily falling, of 25–35+, distinct or loosely basally ± coherent, subplumose to barbellate bristles in 1 series (falling separately or in groups or rings). x = 12, 13, 14, 15.

Distribution

Introduced; Australia, cultivated and escaping in many areas elsewhere

Discussion

Species 6 (1 in the flora).

Selected References

None.

... more about "Xerochrysum"
truncate-penicillate;truncate +
scarious +
mostly ovate +  and lanceovate or linear +
indeterminate +  and determinate +
Guy L. Nesom +
Tzvelev +
cuneate +
compound +  and simple +
spatulate;oblanceolate lanceolate or linear +
5-ribbed +, 3-ribbed +  and 2-ribbed +
muriculate +, papillate +  and smooth +
subplumose +  and barbellate +
coherent +  and distinct +
actinomorphic +
columnar +  and more or less prismatic +
Australia +  and cultivated and escaping in many areas elsewhere +
Greek xeros, dry, and chrysos, gold, perhaps alluding to phyllaries +
glabrous +, stipitate-glandular +  and arachnose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
hemispheric +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
rarely lanceovate +  and lanceolate +
2-carpellate +
persistent +
Novosti Sist. Vyssh. Rast. +
conic;more or less columnar +
exalbuminous +
appendaged +  and truncate +
papillate +
Bracteantha +
Xerochrysum +
Asteraceae tribe Gnaphalieae +
perennial +, biennial +  and annual +
20 cm200 mm <br />0.2 m <br /> (90 cm900 mm <br />0.9 m <br />) +
shrub +  and subshrub +
15 +, 14 +, 13 +  and 12 +