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coastal tidy tips, tidy-tips

Sierra layia, Sierra tidy tips

Habit Plants 3–70 cm (self-incompatible); glandular, not strongly scented. Plants 5–100 cm (self-incompatible); glandular, strongly lemon- or acrid-scented.
Stems

usually not purple-streaked.

not purple-streaked.

Leaf

blades lanceolate or oblanceolate to linear, 4–100(–120) mm, margins (basal leaves) toothed to pinnatifid.

blades oblanceolate or lanceolate to linear, 6–110 mm, margins (basal leaves) 1–2-pinnatifid.

Involucres

hemispheric, 4–18 × 4–15+ mm.

± hemispheric, 5–12 × 2–12+ mm.

Ray florets

5–18;

laminae yellow or proximally yellow and distally white, 3–21 mm.

3–14;

laminae yellow or white, 3–26 mm.

Disc florets

6–120+;

corollas 3.5–6 mm;

anthers ± dark purple (in southwest of range, sometimes yellow or brownish).

7–120+;

corollas 3–6 mm;

anthers yellow to brownish.

Phyllaries

5–18, apices often longer (sometimes shorter) than folded bases.

4–14, apices shorter or longer than folded bases.

Ray cypselae

glabrous or sparsely hairy.

glabrous.

Paleae

in 1 series between ray and disc florets.

in 1 series between ray and disc florets.

Disc

pappi 0 or of 14–32 white to tawny, ± equal bristles or setiform scales 2–5 mm, each ± scabrous, usually not plumose and not adaxially woolly (in southwest of range, often proximally plumose and adaxially woolly).

pappi 0 or of 1–22 whitish, ± equal, setiform scales 1.5–3.5 mm, each proximally plumose, seldom adaxially woolly.

2n

= 14.

Layia platyglossa

Layia pentachaeta

Phenology Flowering Feb–Jul.
Habitat Open, often grassy slopes or flats, disturbed sites, often on sandy or clayey soil, sometimes serpentine
Elevation 0–2000 m (0–6600 ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Layia platyglossa occurs from the North Coast Ranges through central-western and southwestern California and west to the immediate coast and east into the central Great Valley. A specimen reported by S. L. Welsh et al. (1993) from dunes in Utah (Harrison 2545, BRY) may be mislabeled.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Subspecies 2 (2 in the flora).

Molecular phylogenetic data have indicated that Layia pentachaeta is closely related to L. glandulosa and L. discoidea (B. G. Baldwin, unpubl.). Distributions of L. pentachaeta and L. glandulosa overlap broadly; the two species occur in different habitats and natural hybridization has been rarely detected (first-generation hybrids are of low to moderate fertility; J. Clausen 1951).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Ray corollas yellow
subsp. pentachaeta
1. Ray corollas white
subsp. albida
Source FNA vol. 21, p. 265. FNA vol. 21, p. 266.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Madiinae > Layia 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. septentrionalis
L. carnosa, L. chrysanthemoides, L. discoidea, L. fremontii, L. gaillardioides, L. glandulosa, L. heterotricha, L. hieracioides, L. jonesii, L. leucopappa, L. munzii, L. platyglossa, L. septentrionalis
Subordinate taxa
L. pentachaeta subsp. albida, L. pentachaeta subsp. pentachaeta
Synonyms Callichroa platyglossa, L. platyglossa subsp. campestris, L. ziegleri
Name authority (Fischer & C. A. Meyer) A. Gray: Mem. Amer. Acad. Arts, n. s. 4: 103. (1849) A. Gray: in War Department [U.S.], Pacif. Railr. Rep. 4(5): 108. (1857)
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