Directory       News       Site Map       Home
    Jepson eFlora
Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.



Guy L. Nesom

Annual to perennial herb, generally fibrous-rooted, often from rhizome or stolon. Stem: generally 1, erect, thinly and persistently white-tomentose. Leaf: basal and cauline, sometimes in rosettes, alternate, linear to (ob)lanceolate or spoon-shaped, narrowed or expanded at base, entire, adaxially generally green, ± glabrous, abaxially generally silvery-tomentose. Inflorescence: heads disciform, generally in terminal cluster subtended by leafy bracts, sometimes with axillary clusters, rarely 1; involucre cylindric to narrowly bell-shaped; phyllaries graduated in 3–4+ series, generally straw-colored to ± brown, sometimes ± pink or purple, transparent, base not glandular, distally stiff-papery; receptacle flat, smooth, epaleate. Pistillate flower: 16–150; corolla narrowly tubular, ± purple or distally so. Disk flower: 1–7; corolla purple or distally so; anther base tailed, tip ± triangular; style tip truncate, hair-tufted. Fruit: obovate-elliptic, slightly flattened, faces with minute, club-shaped papillae or hairs; pappus bristles in 1 series, deciduous, free or basally fused.
17 species: native to Australasia, eastern Asia; some species widely naturalized. (Greek: true tunic, for bracts closely subtending head cluster) [Nesom 2006 FNANM 19:440–442]
Unabridged references: [Nesom 2002 Sida 20:515–521]

Key to Euchiton

1. Annual; taprooted; leaf base not expanded; bracts subtending heads 4–8; heads in spheric clusters; disk flower 1 ..... E. sphaericus

1' Biennial or perennial herb; fibrous-rooted; cauline leaf base ± expanded; bracts subtending heads 2–5; heads in hemispheric clusters; disk flowers 3–5(7)

2. Stolons generally present; basal leaves in rosettes at flower; cauline leaves 2–4(6), blade 1–2 cm, 1–2 mm wide, linear to oblanceolate; bracts subtending heads 2–3, generally not surpassing heads; pistillate flowers 40–60 ..... E. gymnocephalus

2' Stolons generally 0; basal leaves withering before flower; cauline leaves 6–10, 3–8 cm, 2–3 mm wide, generally ± linear; bracts subtending heads 3–5, surpassing heads; pistillate flowers 80–150 ..... E. involucratus


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.