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smooth tidy tips

Munz's tidy-tips

Habit Plants 4–53 cm (self-incompatible); not glandular, not strongly scented. Plants 6–50 cm (self-incompatible); glandular, not strongly scented.
Stems

not purple-streaked.

not purple-streaked.

Leaf

blades lanceolate or oblanceolate to linear, 5–120 mm, margins (basal leaves) lobed to pinnatifid.

blades oblanceolate to linear, 5–60 mm, margins (basal leaves) lobed.

Involucres

hemispheric or depressed-hemispheric, 4–12 × 4–14+ mm.

hemispheric to ± urceolate, 5–9 × 5–10+ mm.

Ray florets

6–16;

laminae usually proximally yellow, distally white or light yellow, rarely uniformly yellow throughout, 3–18(–24) mm.

6–15;

laminae proximally yellow, distally white, 3–14 mm.

Disc florets

28–100+;

corollas 3–5 mm;

anthers ± dark purple.

16–100+;

corollas 3.5–5 mm;

anthers ± dark purple.

Phyllaries

6–16, apices often longer (sometimes shorter) than folded bases.

6–15, apices shorter or longer than folded bases.

Ray cypselae

glabrous.

glabrous or sparsely hairy.

Paleae

subtending ± all disc florets.

in 1 series between ray and disc florets.

Disc

pappi 0 or of 2–18 tawny, subulate to setiform, unequal scales 1–4 mm, each ± scabrous, not adaxially woolly.

pappi of 9–12 whitish, lance-linear, attenuate, ± equal scales 2–3.5 mm, each ± scabrous, not plumose, not adaxially woolly (bases sparsely setose).

2n

= 16.

= 14.

Layia chrysanthemoides

Layia munzii

Phenology Flowering Mar–Jun. Flowering Mar–Apr.
Habitat Grasslands, open woodlands, often valley bottoms, disturbed sites, edges of vernal pools, waterways, and salt marshes, usually on heavy soils, sometimes ± alkaline or saline Open, ± alkaline flats, depressions, flood plains, in grasslands, saltbush scrub, on clayey soils
Elevation 0–800 m (0–2600 ft) 30–800 m (100–2600 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Layia chrysanthemoides occurs from the western Great Valley to the coast in northern and central California. Molecular and morphologic data have indicated that L. chrysanthemoides is most closely related to L. fremontii (B. G. Baldwin, unpubl.); the two species are reportedly highly interfertile (natural hybrids have not been reported; J. Clausen 1951).

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

Of conservation concern.

Layia munzii occurs in the southern San Joaquin Valley and South Inner Coast Ranges. Populations are evident only in some wet years, when dense stands may be found, sometimes near L. platyglossa (natural hybrids have not been reported; artificial hybrids have reduced fertility; J. Clausen 1951).

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

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. discoidea, L. fremontii, L. gaillardioides, L. glandulosa, L. heterotricha, L. hieracioides, L. jonesii, L. leucopappa, L. munzii, L. pentachaeta, L. platyglossa, L. septentrionalis
L. carnosa, L. chrysanthemoides, L. discoidea, L. fremontii, L. gaillardioides, L. glandulosa, L. heterotricha, L. hieracioides, L. jonesii, L. leucopappa, L. pentachaeta, L. platyglossa, L. septentrionalis
Synonyms Oxyura chrysanthemoides, L. chrysanthemoides subsp. maritima
Name authority (de Candolle) A. Gray: Proc. Amer. Acad. Arts 7: 360. (1868) D. D. Keck: Madroño 3: 16. (1935)
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