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Key to LayiaView taxon page for Layia
(For a list of species in Layia, use the above link.) Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots. 2' Plant glandular; paleae in 1 involucre-like series between ray and disk flowers 3. Plants apple- or banana-scented; basal At or near the base of a plant or plant part. Especially said of leaves clustered near the ground or of a placenta confined to the base of an ovary. rosette A radiating cluster of leaves generally at or near ground level. leaves generally minutely dentate Having margins with sharp, relatively coarse teeth pointing outward, not tipward. to minutely serrate Having margins with sharp, fine to coarse teeth generally pointing tipward, not outward; margins with such teeth on such primary teeth are doubly serrate. (coarsely toothed); ray corolla white or cream ..... L. heterotricha (2) 3' Plants unscented or not apple- or banana-scented; basal rosette leaves lobed; ray corolla white, yellow, or 2-colored, yellow proximally, distally ± white or pale yellow 4. Stem generally purple-streaked; involucre Group of bracts more or less held together as a unit, subtending a flower, fruit (acorn cup), or inflorescence. bell-shaped to hemispheric, ± spheric, or ± urn-shaped Widening more or less abruptly at the base and then gradually or abruptly narrowed toward the tip. 5. Involucre ± spheric to bell-shaped or hemispheric; ray flowers 6–18 in 1 series, ray yellow throughout or distally white or pale-yellow ..... L. gaillardioides (2) 5' Involucre ± widely urn-shaped; ray flowers 13–27 in 2 series, ray 2-colored ..... L. jonesii (2) 4' Stem generally not purple-streaked; involucre ± hemispheric 6. Plant not strongly scented; ray yellow throughout or distally white; anthers generally ± dark purple, sometimes yellow to ± brown in SW ..... L. platyglossa (2) 6' Plant strongly lemon- or acrid-scented; ray white or yellow; anthers yellow to ± brown ..... L. pentachaeta (2) 1' Disk pappus of 1–32 awns 1. Bristle-like appendage or elongation, generally terminal. 2. Stiff, needle-like pappus element in Asteraceae. , bristles, or scales 8' Heads radiate, ray sometimes inconspicuous 9. Paleae subtending ± all disk flowers; plant glandless 10' Disk pappus of ± equal, lanceolate Narrowly elongate, widest in the basal half, often tapered to an acute tip. scales ..... L. fremontii 9' Paleae in 1 involucre-like series between ray and disk flowers; plant glandular 11. Disk pappus of elliptic In the shape of a flattened circle or ellipse; wider than linear or lance-linear to ovate Egg-shaped (i.e., widest below the middle) in two dimensions (i.e., in one plane), as a leaf. , non-plumose, non-woolly scales, 0.5–3.5 mm, bases sparsely bristly 12' Ray proximally yellow, distally white; anthers ± dark purple; ray fruit glabrous or sparsely hairy 13. Ray flowers 13–27 in 2 series; stem generally purple-streaked; pappus 0.5–2 mm; ray fruit shiny, glabrous; s CCo, c SCoRO ..... L. jonesii (2) 13' Ray flowers 6–15 in 1 series; stem not purple-streaked; pappus 2–3.5 mm; ray fruit ± dull, glabrous or sparsely hairy; s SnJV ..... L. munzii 11' Disk pappus generally of bristles or bristle-like scales, 1–7 mm, if scales linear-attenuate or awl-shaped, then proximally plumose Plume-like, usually with the parts arrayed in three dimensions around an axis, or in tufts held together at the base; usually pertaining to small, finely divided structures, such as certain stigmas and pappus elements. and often proximally woolly adaxially 14. Disk pappus bristles or scales proximally plumose and adaxially woolly, or ± scabrous throughout, if proximally plumose and not woolly, then scales linear-attenuate or awl-shaped; plant generally not strongly scented if not touched 15. Disk pappus of 10–15 linear-attenuate or awl-shaped scales; ray generally ± white, sometimes pale or golden yellow 16. Herbage strongly resinous-spicy scented; ray white, generally aging pink to rose; pappus scales linear-attenuate, <= 0.13(0.19) mm wide at base; in loose, fine sand of backdunes, sandhills, s CCo, w edge SCoRO (San Luis Obispo, Santa Barbara cos.) ..... L. erubescens 16' Herbage generally not strongly scented; ray white or cream, occasionally aging pink to rose, or pale- to golden-yellow; pappus scales linear-attenuate to awl-like, <= 0.3 mm wide at base; in coarse sandy or gravelly (silty) soils, inland from coast except in SW ..... L. glandulosa 15' Disk pappus of (11)14–32 bristles or bristle-like scales; ray yellow throughout or distally white 17. Disk pappus generally scabrous throughout, sometimes proximally plumose and adaxially woolly in SW; ray yellow throughout or distally white; anthers generally ± dark purple, sometimes yellow to ± brown in SW; involucre ± hemispheric; phyllary tips often > folded bases ..... L. platyglossa (2) 17' Disk pappus densely plumose proximally and adaxially woolly; ray yellow; anthers yellow to ± brown; involucre narrower, bell-shaped to ± ellipsoid; phyllary tips generally < folded bases ..... L. septentrionalis 14' Disk pappus bristles or bristle-like scales proximally plumose, generally not woolly adaxially; plant generally strongly scented, even when not touched (except fleshy plants of coastal dunes) 18. Disk pappus readily falling as a unit; basal rosette leaves generally minutely dentate or minutely serrate (coarsely toothed); ray white or cream ..... L. heterotricha (2) 18' Disk pappus persistent; basal rosette leaves lobed; ray white or yellow throughout, or proximally yellow and distally white or pale yellow 19' Anthers ± dark purple 21' Stem purple-streaked; ray yellow throughout or distally ± white or pale yellow, 1–18 mm; ray fruit glabrous 22. Ray yellow throughout or distally ± white or pale-yellow, 3.5–18 mm; disk pappus of 15–24 bristles or bristle-like scales, main stem ascending Curving or angling upward from base, or about 30-60 degrees less than vertical or away from axis of attachment. , not strictly erect Upright; vertically oriented. ..... L. gaillardioides (2) 22' Ray yellow, 1–4 mm; disk pappus of 10–16 bristles or bristle-like scales; main stem strictly erect ..... L. hieracioides
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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .
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