Layia chrysanthemoides |
Layia munzii |
|
---|---|---|
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 |
CA
|
CA
|
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 | ||
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) |
Web links |