( Fisch. & C.A.Mey.) A.Gray
Tidy tips is found throughout low-elevation dry habitats in California, and the state in the Mojave Desert into Arizona and Utah. It is common in grassy places at low elevations in grassy slopes and openings in coastal sage scrub, grasslands and chaparral, coastal plains, and the High Desert. It is a member of Spring wildflower 'displays,' and grows during the months of March to June.
Layia platyglossa is an annual, glandular, daisy like plant with narrow, rough hairy leaves. The height of the entire plant is less than 1 foot (0.30 m), roughly around 4–12 inches (10–30 cm) wide. The roots are usually taproots, sometimes fibrous.
The leaves at the upper part of the stem are short and have a pilous texture. The leaves at the basal part of the stem can be dentate to pinnate shaped with rotund short lobes. The lower leaves are generally lobed and the upper leaves are entire. Leaves usually alternate or opposite, and the blades are usually simple, rarely compound.
The plant is an indeterminate zygomorphic inflorescent, individual heads are borne on a peduncle. The stems are usually erect, prostrate or decumbent to ascending, and are stout and corymbed branched.
The flower heads are composed of five to eighteen yellow ray flowers with white tips and many central yellow disk flowers. Its outer ray flowers are bright golden yellow with distinct, sharp-margined white tips. The bracts tips are rounded and involucre 6–12 mm high. The corolla is 4–6 mm long. The ray flowers are 3-3.8 mm long and the disk flowers are 2.8–5 mm long. The ligules are 6–15 mm long and 5–10 mm wide. The florets are bisexual, pistillate, functionally staminate or neuter. The sepals are highly modified.
Pollination is done by insects. The fruits are usually dry with thick, tough pericarps, sometimes rostrate and/or winged. Dispersion is done by the help from pappi (dispersal of fruit by wind). Seeds are one per fruit, embryos straight.
Layia platyglossa is cultivated as an ornamental plant. It is often an ingredient in commercial wildflower seed mixes. The daisy-like flowers are attractive, making it a popular annual flower in traditional gardens, wildlife gardens, and habitat gardens.
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- USDA . accessed 11/10/2010
- Munz, Philip A.; "Introduction to California Spring Wildflowers of the Foothills, Valleys, and Coast. California" — University of California Press; Berkeley, 2004.
- Schmidt, Marjorie G.; "Growing California Native Plants" — California: University of California Press Berkeley, 1980.
- Lady Bird Johnson Wildflower Center Native Plant Database: Layia platyglossa . accessed 10.1.2013
- Las Pilitas Horticultural Database: Layia platyglossa (Tidy Tips) . accessed 10.1.2013
- Abrams, Leroy, and Stinchfield, Roxana; "Illustrated Flora of the Pacific States. Vol IV: Bignonias to Sunflowers" — California: Stanford University Press, 1960.
- Jepson Manual Treatment — Layia platyglossa
- Calflora Database: Layia platyglossa
- USDA Plants Profile for Layia platyglossa (tidy tips) — plant data, distribution map.
- Layia platyglossa — U.C. Calphoto gallery