Flora of North America species comparison

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Layia hieracioides

hawkweed layia, tall tidytips
Habit Plants 5–130 cm (self-compatible); glandular, usually strongly sweet- or pungent-scented.
Stems

purple-streaked.
Leaf

blades elliptic, lanceolate, linear, or oblanceolate, 7–150 mm, margins (basal leaves) lobed to toothed.
Involucres

± ellipsoid to obconic, 4–9 × 4–9+ mm.
Ray florets

6–16;

laminae yellow, 1–4 mm.
Disc florets

9–80;

corollas 2.5–4.5 mm;

anthers ± dark purple.
Phyllaries

6–16, apices shorter than folded bases.
Ray cypselae

glabrous.
Paleae

in 1 series between ray and disc florets.
Disc

pappi of 10–16 white to rufous or purplish, ± equal bristles or setiform scales 2–4 mm, each proximally plumose, not adaxially woolly.
2n

= 16, 32.

Layia hieracioides
Phenology Flowering Apr–Jul.
Habitat Open, often grassy, or semishady sites in chaparral, woodlands, forests, and coastal scrub, often sandy soils, disturbed sites
Elevation 0–1200 m (0–3900 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Layia hieracioides occurs in the southern San Francisco Bay area, South Coast Ranges, and Western Transverse Ranges. Diploids and tetraploids are morphologically similar and reportedly geographically distinct, with diploids documented from the San Francisco Bay area and tetraploids (= L. paniculata) documented to the south. Natural, ± sterile hybrids between tetraploid plants and L. glandulosa have been documented from the Central Coast (B. D. Tanowitz and J. W. Adams 1986; R. F. Hoover 8369, UC).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 21, p. 268.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Madiinae > Layia
Sibling taxa
L. carnosa, L. chrysanthemoides, L. discoidea, L. fremontii, L. gaillardioides, L. glandulosa, L. heterotricha, L. jonesii, L. leucopappa, L. munzii, L. pentachaeta, L. platyglossa, L. septentrionalis
Synonyms Madaroglossa hieracioides, L. paniculata
Name authority (de Candolle) Hooker & Arnott: Bot. Beechey Voy., 358. (1839)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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