Flora of North America species comparison

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Layia septentrionalis

Colusa layia, Colusa tidytips
Habit Plants 6–35 cm (self-incompatible); glandular, not strongly scented.
Stems

purple-streaked or not.
Leaf

blades oblanceolate or lanceolate to linear, 4–70 mm, margins (basal leaves) toothed to pinnatifid.
Involucres

± ellipsoid to campanulate, 5–12 × 3–12+ mm.
Ray florets

5–9;

laminae yellow, 4–15 mm.
Disc florets

10–65+, corollas 5–8 mm;

anthers yellow to brownish.
Phyllaries

5–9, apices usually shorter than folded bases.
Ray cypselae

glabrous or sparsely hairy.
Paleae

in 1 series between ray and disc florets.
Disc

pappi of 16–22 white, ± equal bristles or setiform scales 4–7 mm, each proximally plumose and adaxially woolly.
2n

= 16.

Layia septentrionalis
Phenology Flowering Apr–Jun.
Habitat Grasslands, openings in chaparral, woodlands, on serpentine or sandy soils
Elevation 100–900 m (300–3000 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Layia septentrionalis occurs in the central and southern Inner North Coast Ranges and the Sutter Buttes (southern Sacramento Valley).

(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. hieracioides, L. jonesii, L. leucopappa, L. munzii, L. pentachaeta, L. platyglossa
Name authority D. D. Keck: Aliso 4: 106. (1958)
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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