Hypochaeris chillensis |
Hypochaeris glabra |
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Brazilian cat's ear, Tweedy's cat's ear |
smooth cat's-ear |
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Habit | Biennials or perennials, 30–70 cm; taproots vertical, deep, thick, caudices stout. | Annuals, 10–50 cm; taproots slender, vertical; caudices small, ± herbaceous. |
Stems | (1–5) erect or ascending, simple or sparingly branched distally, glabrous or pilose proximally. |
(1–30), sparingly branched at midstem or distally (lateral branches often short, minutely bracteate or naked), glabrous. |
Leaves | 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). |
usually all basal; blades oblanceolate to oblong, 20–110 × 5–30 mm, margins nearly entire to dentate or pinnatifid, faces usually glabrous or glabrate, sometimes hirsute on veins. |
Involucres | broadly campanulate, 10–20 × 5–20 mm. |
narrowly campanulate, 8–16 × (3–)5–20 mm. |
Florets | 50–100+; corollas yellow, 5–7 mm, equaling phyllaries at flowering. |
20–40; corollas white to yellowish, 5–8 mm, ± equaling phyllaries at flowering. |
Phyllaries | 20–30, linear-lanceolate, 4–15 mm, unequal, ± hirsute (at least medially). |
18–20, lanceolate, 3–18 mm, unequal, margins scarious, faces glabrous (apices brownish or reddish, sometimes ciliate). |
Heads | 1–10, in loose, paniculiform to corymbiform arrays. |
borne singly or 2–3 in loose, cymiform arrays (terminating branches, not showy). |
Cypselae | 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. |
dimorphic, outer cylindric, stout, truncate, inner fusiform, slender, beaked; bodies dark brown, 10-nerved, 8–10 mm, beaks 3–4 mm; pappi of tawny bristles in 2 series, outer barbellate, shorter than plumose inner, longest 9–10 mm. |
2n | = 8, 10. |
= 8, 10, 12. |
Hypochaeris chillensis |
Hypochaeris glabra |
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Phenology | Flowering Apr. | Flowering Feb–Jun(–Dec). |
Habitat | Waste areas with sandy soil, roadsides, lawns | Grassy slopes, sage scrub, pine-hardwood forest, disturbed areas, roadsides, commonly in sandy soil |
Elevation | 0–100 m (0–300 ft) | 100–1300 m (300–4300 ft) |
Distribution |
AL; FL; GA; LA; MS; NC; SC; TX; South America [Introduced in North America]
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Europe [Introduced. B.C.. Ala., Ark., Calif., Fla., Ga., Ill., La., Maine, Mass., Miss., N.Y., N.C., Oreg., Pa., S.C., Tenn., Tex., Wash., W.Va.]
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Discussion | 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.) |
Hypochaeris glabra is usually distinguishable by its annual habit and relatively small size, slender and shallow roots, fine stems, often glabrous leaves, and beakless, truncate outer cypselae. Occasional specimens are larger and have induments characteristics of H. radicata; they can be distinguished by the dimorphic cypselae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 19, p. 298. | FNA vol. 19, p. 298. |
Parent taxa | Asteraceae > tribe Cichorieae > Hypochaeris | Asteraceae > tribe Cichorieae > Hypochaeris |
Sibling taxa | ||
Synonyms | Apargia chillensis, Achyrophorus chillensis, H. brasiliensis, Porcellites brasiliensis | |
Name authority | (Kunth) Britton: Bull. Torrey Bot. Club 19: 371. (1892) | Linnaeus: Sp. Pl. 2: 811. (1753) |
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