Hypochaeris glabra

Linnaeus

Sp. Pl. 2: 811. 1753.

Common names: Smooth cat’s ear
Introduced
Treatment appears in FNA Volume 19. Treatment on page 298. Mentioned on page 299.

Annuals, 10–50 cm; taproots slender, vertical; caudices small, ± herbaceous. Stems (1–30), sparingly branched at midstem or distally (lateral branches often short, minutely bracteate or naked), glabrous. Leaves 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. Heads borne singly or 2–3 in loose, cymiform arrays (terminating branches, not showy). Involucres narrowly campanulate, 8–16 × (3–) 5–20 mm. Phyllaries 18–20, lanceolate, 3–18 mm, unequal, margins scarious, faces glabrous (apices brownish or reddish, sometimes ciliate). Florets 20–40; corollas white to yellowish, 5–8 mm, ± equaling phyllaries at flowering. Cypselae 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, 12.


Phenology: Flowering Feb–Jun(–Dec).
Habitat: Grassy slopes, sage scrub, pine-hardwood forest, disturbed areas, roadsides, commonly in sandy soil
Elevation: 100–1300 m

Distribution

V19-434-distribution-map.gif

. 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., Europe

Discussion

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.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Hypochaeris glabra"
12 +, 10 +  and 8 +
rounded;acute +
scarious +
ovate +  and lanceolate +
indeterminate +  and determinate +
David J. Bogler +
Linnaeus +
decurrent +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
compound +  and simple +
2 cm20 mm <br />0.02 m <br /> (11 cm110 mm <br />0.11 m <br />) +
oblanceolate;oblong +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
dark-brown +
tuberculate +, rugose +, muricate +  and smooth +
fusiform;ellipsoid +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
filiform +
Smooth cat’s ear +
zygomorphic +, actinomorphic +  and (3-)5-merous +
white +  and yellowish +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
usually brown +  and golden +
tapered +, beaked +, flattened +, obcompressed +, compressed +, prismatic +, fusiform +, ellipsoid +, columnar +  and clavate +
. 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. +  and Europe +
100–1300 m +
glabrous +, hirsute +  and glabrate +
muricate +
winged +  and beaked +
dispersed +
Grassy slopes, sage scrub, pine-hardwood forest, disturbed areas, roadsides, commonly in sandy soil +
indeterminate +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
campanulate +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
pinnatifid +  and dentate +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2-carpellate +
linear;subulate +
persistent +
Flowering Feb–Jun(–Dec). +
connate +  and distinct +
hirsute +, glabrate +  and glabrous +
18 +  and 20 +
0.3 cm3 mm <br />0.003 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
10 +, 4 +  and 5 +
exalbuminous +
Introduced +
1 (?) +  and 30 (?) +
1 +  and 15 +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Hypochaeris glabra +
Hypochaeris +
species +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 m <br />) +
shrub +  and subshrub +