Xerochrysum
Novosti Sist. Vyssh. Rast. 27: 151. 1990.
Taxon | Illustrator ⠉ | |
---|---|---|
Helichrysum 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.