Crepis occidentalis subsp. costata

(A. Gray) Babcock & Stebbins

Publ. Carnegie Inst. Wash. 504: 124. 1938.

Endemic
Basionym: Crepis occidentalis var. costata A. Gray in W. H. Brewer et al., Bot. California 1: 435. 1876
Treatment appears in FNA Volume 19. Treatment on page 233. Mentioned on page 232.

Plants 8–40 cm. Stems tomentose, sometimes stipitate-glandular distally. Leaves 5–20 × 2–3.5 cm, pinnately lobed (lobes dentate; distal cauline stipitate-glandular and with large dark or black setae). Heads 15–30. Peduncles stipitate-glandular. Phyllaries 7–8, stipitate-glandular and with dark or black, glandular-setae. Florets 10–14. Cypselae golden brown. 2n = 44.


Phenology: Flowering Jun–Jul.
Habitat: Grassy banks, dry rocky hillsides, black shale or sandstone, juniper-oak woods
Elevation: 1200–2500 m

Distribution

V19-299-distribution-map.gif

B.C., Sask., Calif., Colo., Idaho, Mont., Nev., Oreg., Utah., Wash., Wyo.

Discussion

The major distinguishing characteristic of subsp. costata appears to be the relatively large, dark or black setae on the phyllaries. As defined by E. B. Babcock (1947), subsp. costata is a series of polyploid apomictic forms that are difficult to distinguish from subsp. occidentalis, as well as other species such as C. intermedia and C. bakeri. Reports for Arizona and South Dakota were not confirmed for this treatment.

Selected References

None.

Lower Taxa

None.

"fine" is not a number."fine" is not a number.

stipitate-glandular +, setose +  and gray-tomentose +
with fine hairs +  and glabrous +
scarious +
ovate +  and lanceolate +
indeterminate +  and determinate +
David J. Bogler +
(A. Gray) Babcock & Stebbins +
runcinate +, lyrate +, lanceolate +  and linear or spatulate +
decurrent +
Crepis occidentalis var. costata +
compound +  and simple +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
8 cm80 mm <br />0.08 m <br /> (20 cm200 mm <br />0.2 m <br />) +
runcinate +
2cm;5cm +
tuberculate +, rugose +, muricate +  and smooth +
setose +, tomentulose +  and glabrous +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
filiform +
glabrate +  and tomentose +
lobing +, entire +  and lobed +
zygomorphic +, actinomorphic +  and (3-)5-merous +
1.8 cm18 mm <br />0.018 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
golden brown +
subcylindric +
B.C. +, Sask. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah. +, Wash. +  and Wyo. +
1200–2500 m +
stipitate-glandular +  and gray-tomentose +
winged +  and beaked +
dispersed +
Grassy banks, dry rocky hillsides, black shale or sandstone, juniper-oak woods +
indeterminate +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
5cm;20cm +
cauline +  and basal +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
toothed +
dentate +  and entire +
green +  and yellowish +
pinnately-lobed +  and sinuously dentate +
2-carpellate +
yellowish white +
persistent +
connate +  and distinct +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
stipitate-glandular +
Flowering Jun–Jul. +
connate +  and distinct +
stipitate-glandular +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Publ. Carnegie Inst. Wash. +
hairy +  and glabrous +
convex;flat +
10 +  and 18 +
spiculate-roughened +
rounded +
exalbuminous +
1 +  and 3 +
appendaged +  and truncate +
papillate +
Psilochenia occidentalis +
Crepis occidentalis subsp. costata +
Crepis occidentalis +
subspecies +
taprooted +  and rhizomatous +
8 cm80 mm <br />0.08 m <br /> (40 cm400 mm <br />0.4 m <br />) +
11 +, 6 +, 5 +, 4 +  and 3 +