|
|
 |
Key to PackeraView taxon page for Packera
(For a list of species in Packera, use the above link.) Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots. 2. Plants < 15 cm, ± scapose  Pertaining to a plant or an inflorescence in which a relatively long peduncle (scape) arises, sometimes with leaf- or scale-like bracts but without true foliage leaves, from a rosette or other arrangement of leaves at ground level. ; cauline leaves much reduced; heads generally < 5 ..... P. werneriifolia (2) 2' Plants generally > 15 cm; cauline leaves gradually reduced; heads generally > 5 3. Caudex taprooted; leaves thin; heads generally > 10, phyllaries deep green or ± red-tipped; generally below subalpine elevations ..... P. indecora (2) 3' Caudex weakly spreading  Oriented more or less perpendicularly to the axis of attachment; often, more or less horizontal. and fibrous  1. Pertaining to structures that are composed at least in part of more or less thread-like but usually tough elements (e.g., Yucca leaves). 2. Pertaining to a root system composed of many roots similar in length and thickness (e.g., grass roots). rooted; leaves thick, firm; heads generally 4–8, phyllaries deep red or green with ± red tips; often subalpine to alpine elevations ..... P. pauciflora (2) 1' Heads radiate, some with rays barely exceeding phyllaries 4. Basal leaves ± pinnately lobed 5. Herbage glabrous or at most sparsely and irregularly hairy when young 6. Caudex taprooted; peduncle  Stalk of an individual flower borne singly, not in an inflorescence, or of an entire inflorescence, or the corresponding structure in fruit; the stalk subtending an involucre (e.g., in Asteraceae, Polygonaceae). conspicuously bracted; plants in SN and e ..... P. multilobata (2) 6' Caudex fibrous rooted; peduncle not bracted or bracts inconspicuous; plants west of SNH 7. Plants stout or slender, generally < 50 cm; 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. leaves with 1–3 pairs of lateral lobes  1. A major expansion or bulge, such as on the margin of a leaf, sepal, or petal, or on the surface of an ovary. 2. The free tips of otherwise fused structures, such as sepals or petals; larger than teeth. , terminal lobes ± round, ultimate margins evenly, regularly incised, sinuses rounded, bases ± cordate  Heart-shaped; often pertaining to a leaf in which the blade base on both sides of the petiole is rounded and convex. ; heads (3)8–15+ ..... P. bolanderi var. bolanderi 7' Plants large, robust, generally > 50 cm; basal leaves with 2–6+ pairs of lateral lobes, terminal lobes ovate  Egg-shaped (i.e., widest below the middle) in two dimensions (i.e., in one plane), as a leaf. to oblong  Longer than wide, with nearly parallel sides; wider than linear. , ultimate margins irregularly incised, bases tapered  Gradually (not abruptly) narrower or smaller at base or tip. ; heads 15–50+ ..... P. breweri 5' Herbage generally hairy or becoming glabrous near flower time 8. Heads generally 3–6; plants generally <= 3 dm; basal leaves generally <= 3 cm, with 1–3 pairs of lateral lobes ..... P. ionophylla (2) 8' Heads 5–30+; plants 2–5+ dm; basal leaves generally > 4 cm, with 2–6 pairs of lateral lobes 9. Basal leaves persistent; heads small, rays 7–10 mm; herbage evenly but lightly hairy ..... P. multilobata (2) 9' Basal leaves withering before flower; heads large, rays 10–15 mm; herbage densely hairy to becoming glabrous with age ..... P. eurycephala 10. Leaves irregularly lobed or dissected, lateral lobes coarsely dentate  Having margins with sharp, relatively coarse teeth pointing outward, not tipward. , midribs winged; disturbed sites, woodland, roadsides ..... var. eurycephala 10' Leaf margins finely dissected, lateral lobes also dissected, midribs not winged; serpentine soils, rocky sites ..... var. lewisrosei 4' Basal leaves with margins various but not (or weakly) lobed 11. Herbage hairy to becoming glabrous at flower time 12' Rays yellow; heads 2–many; plants of various soils 13. Basal leaves round to widely ovate, obovate or spoon-shaped, petiole  Leaf stalk, connecting leaf blade to stem; sometimes more or less indistinct. >> blade  Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped. 13' Basal leaves ovate, elliptic  In the shape of a flattened circle or ellipse; wider than linear , lanceolate  Narrowly elongate, widest in the basal half, often tapered to an acute tip. , oblanceolate or narrowly spoon-shaped, petiole < or > blade 15' Plants 10–70+ cm; heads >= 5 16. Herbage sparsely tomentose  Covered with densely interwoven, generally matted hairs. , becoming glabrous; ray 12–16 mm, plants only on serpentine ..... P. layneae 16' Herbage canescent, woolly, or densely tomentose, sometimes becoming glabrous; ray 8–10+ mm, plants of various habitats 17. Leaves ovate, elliptic, or widely lanceolate; phyllaries tomentose, fruit 2.5–3.5+ mm ..... P. cana 11' Herbage glabrous or at most tomentose to woolly at flower on proximal stem, in leaf  Organ arising from a stem, generally composed of a stalk (petiole) and a flat, expanded, green, photosynthetic area (blade); distinguished from a leaflet by the presence in its axil of a bud, branch, thorn, or flower; sometimes with lateral, basal appendages (stipules); either simple (toothed, lobed, or dissected but not divided into leaflets) or compound (divided into leaflets). axils and/or at bases of heads 18' Leaves thick or thin, glabrous to sparsely tomentose 20. Leaves widely lanceolate to ± hastate  Arrowhead-shaped, with two basal lobes oriented more or less perpendicularly to the long axis. , margins sharply dentate, plants 5–7+ dm; heads 12–20+, phyllaries light green ..... P. pseudaurea var. pseudaurea 20' Leaves ovate, elliptic, oblanceolate, spoon-shaped, oblong or ± reniform  Kidney-shaped; often pertaining to a leaf in which the blade base on both sides of the petiole is rounded and concave. , margins entire  Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.). to dentate or weakly lobed, plants 1–8 dm; heads 6–20+, phyllaries dark green often red-tipped 21. Caudex taprooted; leaves not noticeably firm; heads generally eradiate or with ray 3–5 mm ..... P. indecora (2) 22. Leaves reniform to ± round; plants only in recently burned chaparral on gabbroic soils ..... P. ganderi 22' Leaves elliptic, ovate, oblanceolate, obovate, spoon-shaped, or at most ± reniform; plants of various habitats, but not in chaparral 23' Ray 6–12+ mm, yellow; heads generally 1–4 24. Phyllaries densely tomentose; head  1. A dense, often spheric inflorescence of sessile or subsessile flowers. 2. In Asteraceae and some other groups, a head-like inflorescence is one in which sessile or subsessile inflorescence units (e.g., heads in Asteraceae, umbels enclosed by involucres in Eriogonum), instead of individual flowers, are attached in a short dense cluster without an evident axis or branches. (1)4; ray 6–10+ mm ..... P. hesperia
Please use this Google Form for Contact/Feedback
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 .
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
|
|
|
