Hypochaeris chillensis
Hypochaeris
Brazilian cat's ear, Tweedy's cat's ear
cat's-ear, swine's succory
(1–5) erect or ascending, simple or sparingly branched distally, glabrous or pilose proximally.
1–15, erect, branched or unbranched, glabrate or coarsely hirsute.
basal and proximally cauline;
basal blades elliptic to oblanceolate, 60–200 × 10–50 mm, margins coarsely and sharply dentate or 2-dentate, ciliate, faces glabrous or coarsely hirsute (cauline sessile, blades lanceolate, 50–100 × 10–30 mm, margins sharply dentate or pinnatifid; distal reduced, entire).
basal or basal and proximally cauline; petiolate or sessile;
blades oblanceolate to oblong or elliptic, margins entire or dentate to pinnately lobed (faces glabrous or hirsute).
slightly inflated distally, minutely bracteate.
broadly campanulate, 10–20 × 5–20 mm.
cylindric or campanulate, 5–20 mm diam. (12–25 mm in fruit).
flat, slightly pitted, paleate;
paleae linear to subulate, scarious.
50–100+;
corollas yellow, 5–7 mm, equaling phyllaries at flowering.
20–100+;
corollas usually yellow or orange, sometimes grayish green or reddish abaxially, rarely white, (not deliquescent).
20–30, linear-lanceolate, 4–15 mm, unequal, ± hirsute (at least medially).
20–30 in 3–4 series, unequal, linear-lanceolate, glabrous, glabrate, or coarsely hirsute.
0 (or indistinguishable from phyllaries).
1–10, in loose, paniculiform to corymbiform arrays.
borne singly or in loose, cymiform, paniculiform, or corymbiform arrays.
monomorphic, all beaked;
bodies golden brown, fusiform, 8–10 mm, muricate, ribs 4–5;
pappi of white, plumose bristles in 1 series, 6–8 mm.
monomorphic (all beaked) or dimorphic (outer truncate, inner beaked), usually brown to golden, bodies ellipsoid or fusiform, ribs 4–5 or 10, faces ± muricate, otherwise glabrous;
pappi persistent, of 40–60+, white to tan bristles in 1 (all plumose) or in 2 series (outer barbellate, shorter than plumose inner).
= 4, 5.
= 8, 10.
Hypochaeris chillensis
Hypochaeris
Hypochaeris chillensis is recognized by the sharply dentate or pinnatifid cauline leaves, yellow corollas, and monomorphic, beaked cypselae. Plants in the flora area differ from those found elsewhere mainly in having the outer phyllaries somewhat more hirsute medially.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Species 60+ (4 in the flora).
Hypochaeris is similar to and closely related to Leontodon, from which it is distinguished mainly by its paleate receptacles and unequal phyllaries. Plumose pappus bristles are characteristic of both Hypochaeris and Leontodon. Molecular studies indicate the South American species of Hypochaeris are a monophyletic group derived from European stock that has undergone a recent and rapid radiation in the New World (R. Samuel et al. 2003). Two South American species are found as weeds in the flora area.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Leaves basal and proximally cauline; pappus bristles in 1 series, all plumose. | → 2 |
1. Leaves all or mostly basal; pappus bristles in 2 series: outer barbellate, shorter than plumose inner | → 3 |
2. Involucres broadly campanulate; phyllaries ± hirsute medially; corollas yellow. | H. chillensis |
2. Involucres cylindric or narrowly campanulate; phyllaries glabrous or sparsely tomentulose; corollas white | H. microcephala |
3. Annuals; leaves usually glabrous or glabrate. sometimes hirsute on veins; florets ± equaling phyllaries at flowering; cypselae dimorphic, outer truncate, inner beaked. | H. glabra |
3. Perennials; leaves ± hirsute; florets surpassing phyllaries at flowering; cypselae monomorphic, all beaked | H. radicata |
LA Plants
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