Sinosenecio newcombei

(Greene) Janovec & T. M. Barkley

Novon 6: 266. 1996.

IllustratedEndemic
Basionym: Senecio newcombei Greene Pittonia 3: 249. 1897
Treatment appears in FNA Volume 20. Treatment on page 619.

Leaves: petiole lengths 2–3 times blades; blades 1–2 × 1–2.5 cm, bases cordate to truncate, lobes 5–7, mucronate. Peduncles bracteolate. Phyllaries 5–8 mm. Ray corollas: laminae 10–15 mm. Disc corollas 3–4 mm. Cypselae 1–2+ mm; pappi 1–2+ mm. 2n = 48.


Phenology: Flowering summer.
Habitat: Open, rocky or boggy places, heath and talus slopes
Elevation: 300–800 m

Discussion

Sinosenecio newcombei grows on the Queen Charlotte Islands, off the coast of British Columbia. It is superficially similar to plants in the genus Packera but differs in having the suite of “tussilaginoid” microcharacters and cytology (T. M. Barkley 1999). Morphologically and ecologically, it falls comfortably into Sinosenecio, which is otherwise restricted to montane regions of the Orient, especially China and Korea. Its occurrence in the Queen Charlotte Islands poses interesting phytogeographic questions.

Selected References

None.

Lower Taxa

None.

"-3timesblades" is not declared as a valid unit of measurement for this property.

... more about "Sinosenecio newcombei"
not tailed +, rounded +  and obtuse +
papillate +
rounded-truncate +
scarious +
usually ovate +  and lance-linear +
spiciform +, racemiform +, paniculiform +  and corymbiform +
indeterminate +  and determinate +
John P. Janovec +  and Theodore M. Barkley† +
(Greene) Janovec & T. M. Barkley +
cordate +  and truncate +
Senecio newcombei +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
ovate;subreniform +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
winged;nerved;ribbed +
barbellulate +  and smooth +
yellow +  and orange-yellow +
10-ribbed or nerved +  and 5-ribbed +
less columnar +  and prismatic +
fertile +  and bisexual +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
fertile +  and bisexual +
300–800 m +
sparsely arachnose +  and tomentose +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open, rocky or boggy places, heath and talus slopes +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
campanulate;hemispheric +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
cauline +  and basal +
recurved;erect +
mucronate +
2-carpellate +
persistent +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering summer. +
lanceolate +
unequal +  and subequal +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
Illustrated +  and Endemic +
appendaged +  and truncate +
papillate +
Compositae +
Sinosenecio newcombei +
Sinosenecio +
species +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
vine +, tree +, shrub +  and subshrub +