Erechtites minimus

(Poiret) 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. 6: 437. 1838.

Introduced
Basionym: Senecio minimus Poiret in J. Lamarck et al., Encycl., suppl. 5: 130. 1817
Treatment appears in FNA Volume 20. Treatment on page 604. Mentioned on page 603.

Annuals or perennials, (50–) 100–200 cm (sparsely and unevenly tomentose, glabrescent). Taproots with branching lateral roots. Stems 1, erect. Leaves evenly distributed (proximal often withering before flowering); indistinctly petiolate (bases often weakly clasping); blades lanceolate to narrowly lanceolate, (3–) 7–20 × 1–4 cm, margins sharply and evenly toothed (not lobed or pinnatifid). Heads (40–) 80–200 in open, corymbiform arrays (or arrays of clusters). Involucres cylindric or turbinate, 4–7 mm. Phyllaries usually 8. Receptacles 3–5 mm diam. Cypselae 1.5–2 mm, usually puberulent in lines along relatively narrow ribs, sometimes glabrous. 2n = 60.


Phenology: Flowering summer–early fall.
Habitat: Disturbed, coastal sites
Elevation: 0–200 m

Distribution

V20-1357-distribution-map.gif

Introduced; Calif., Oreg., Wash., Pacific Islands (New Zealand), Australia

Discussion

The type of Erechtites prenanthoides (A. Richard) de Candolle (a name sometimes misapplied to plants of E. minimus) is conspecific with the type of E. quaridentata (Labillardière) de Candolle.

Selected References

None.

Lower Taxa

None.
... more about "Erechtites minimus"
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
corymbiform +  and open +
indeterminate +  and determinate +
Theodore M. Barkley† +
(Poiret) de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
decurrent +
Senecio minimus +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
7 cm70 mm <br />0.07 m <br /> (20 cm200 mm <br />0.2 m <br />) +
lanceolate;narrowly lanceolate +
1cm;4cm +
winged;nerved;ribbed +
whitish +  and pale-yellow +
glabrous +  and puberulent +
ribbed or more or less obovoid +  and more or less fusiform +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +, Oreg. +, Wash. +, Pacific Islands (New Zealand) +  and Australia +
0–200 m +
villous +, tomentose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Disturbed, coastal sites +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
turbinate;cylindric +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
distributed +
cauline +  and basal +
erect;spreading +
lanceovate +  and deltate +
dentate to pinnatifid +  and entire +
2-carpellate +
Flowering summer–early fall. +
lanceolate +  and linear +
unequal +  and subequal +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
styliferous +, neuter +  and pistillate +
sterile +  and fertile +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
Introduced +
appendaged +  and truncate +
papillate +
Compositae +
Erechtites minimus +
Erechtites +
species +
toothed +, denticulate +  and entire +
50 cm500 mm <br />0.5 m <br /> (100 cm1,000 mm <br />1 m <br />) +
perennial +  and annual +
100 cm1,000 mm <br />1 m <br /> (200 cm2,000 mm <br />2 m <br />) +
vine +, tree +, shrub +  and subshrub +