Taraxacum latilobum

de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 7: 146. 1838.

Common names: Large-lobed dandelion pissenlit à lobes larges
Endemic
Treatment appears in FNA Volume 19. Treatment on page 245. Mentioned on page 242, 243.

Plants 9–75 cm; taproots seldom branched. Stems 1–7+, erect to ascending, ± purplish, glabrate, sometimes ± sparsely villous distally. Leaves 10+, erect to patent; petioles ± narrowly winged; blades broadly oblanceolate to narrowly obovate (often runcinate), 15–47.5 × 2.5–9 cm, bases attenuate, margins usually shallowly lobed to sometimes lacerate (mostly proximally), lobes retrorse or straight, broadly deltate to triangular, sometimes antrorsely curved apically, acute to acuminate, teeth 5–7 on lobes and in sinuses, irregular, triangular or sometimes lanceolate, terminals broader than laterals, apices obtuse to bluntly short-caudate or acuminate (rarely acute), faces glabrous or glabrate to sparsely pilose or villous. Calyculi of ca. 18, reflexed to recurved, ovate to broadly lanceolate bractlets in 3 series, 8–11 × 2–5 mm, margins narrowly scarious, sometimes proximally more widely so, apices acuminate, hornless, ± scarious-erose, tips often purplish and blackish. Involucres dark green, often purplish-tinged, campanulate, (13–) 15–23 mm. Phyllaries 14–18 in 2 series, lanceolate to linear (outer) or ovate to lanceovate (inner), 1.2–4 mm wide, scarious, narrowly (outer, distal part of inner) or widely (proximal part of inner), apices long-acuminate, hornless, scarious, erose, hyaline, purplish-grayish. Florets ca. 150; corollas yellow (outer dark gray striped abaxially, also purplish), 13–17 × 1–1.3 mm. Cypselae olive-tan to tan, bodies oblanceoloid, 2.8–3.8 mm, cones terete, 0.9–1 mm, beaks slender, 8–12 mm, ribs 5, wide (with 2–3 rows of tubercles or spines), faces proximally tuberculate, muricate in distal 1/3–1/2, distalmost spines sometimes very sharp, fused in pairs and flattened; pappi white to creamy, 6.5–7 mm.


Phenology: Flowering summer.
Habitat: Seaside calcareous slopes and grassy taluses or clifftops
Elevation: 0–30 m

Distribution

V19-319-distribution-map.gif

Nfld. and Labr. (Nfld.), Que., Maine.

Discussion

Taraxacum latilobum is known only from the Gulf of St. Lawrence and adjacent areas.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Taraxacum latilobum"
erose +  and scarious-erose +
purplish-grayish;hyaline +
hornless;long-acuminate;hornless;acuminate;obtuse;bluntly short-caudate or acuminate +
scarious +
ovate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Luc Brouillet +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
attenuate +
slender +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
compound +  and simple +
15 cm150 mm <br />0.15 m <br /> (47.5 cm475 mm <br />0.475 m <br />) +
broadly oblanceolate;narrowly obovate +
2.5 cm25 mm <br />0.025 m <br /> (9 cm90 mm <br />0.09 m <br />) +
tuberculate +, rugose +, muricate +  and smooth +
oblanceoloid +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
broadly ovate;lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
filiform +
white +  and cream-colored or yellowish +
Large-lobed dandelion +  and pissenlit à lobes larges +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
zygomorphic +, actinomorphic +  and (3-)5-merous +
1.3 cm13 mm <br />0.013 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
olive-tan +  and tan +
tapered +, beaked +, flattened +, obcompressed +, compressed +, prismatic +, fusiform +, ellipsoid +, columnar +  and clavate +
flattened +  and sharp +
Nfld. and Labr. (Nfld.) +, Que. +  and Maine. +
0–30 m +
glabrate +  and sparsely pilose or villous +
muricate +  and tuberculate +
winged +  and beaked +
dispersed +
Seaside calcareous slopes and grassy taluses or clifftops +
indeterminate +
each +  and sessile +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
purplish-tinged +  and dark green +
0.8 cm8 mm <br />0.008 m <br /> (4 cm40 mm <br />0.04 m <br />) +
campanulate +
1.5 cm15 mm <br />0.015 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
sessile +  and petiolate +
erect +  and patent +
curved +  and straight +
acute +  and acuminate +
lacerate +, lobed to sometimes +  and lobed +
2-carpellate +
white +  and creamy +
persistent +
0.65 cm6.5 mm <br />0.0065 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Flowering summer. +
closing +  and later +
distinct +  and coherent +
14 +  and 18 +
subequal +  and unequal +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
1 (?) +  and 10 (?) +
erect +  and ascending +
villous +  and glabrate +
1 +  and 7 +
scapiform +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Taraxacum latilobum +
Taraxacum +
species +
purplish and blackish +
lanceolate +  and triangular +
with branched caudices +  and taprooted +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
30 cm300 mm <br />0.3 m <br /> (400 cm4,000 mm <br />4 m <br />) +