Erigeron poliospermus var. disciformis

(Cronquist) G. L. Nesom

Sida 21: 24. 2004.

Endemic
Basionym: Erigeron poliospermus forma disciformis Cronquist Brittonia 6: 194. 1947
Treatment appears in FNA Volume 20. Treatment on page 286. Mentioned on page 285.

Stems simple, densely hirsute, sparsely minutely glandular; basal leaves and stems originating from compressed nodes at caudex apices. Heads 1. Involucres densely hirsute, sparsely minutely glandular. Ray-florets 0.


Phenology: Flowering Jun–Jul.
Habitat: Rocky hillsides
Elevation: 800–900 m

Discussion

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +, corymbiform +  and loose +
indeterminate +  and determinate +
Guy L. Nesom +
(Cronquist) G. L. Nesom +
decurrent +
Erigeron poliospermus +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
narrowly oblanceolate;spatulate +
2mm;4mm +
rugulose +  and muricate +
with relatively short and thick branches +  and simple +
not 2-lipped +  and actinomorphic +
white +, usually pink +  and bluish purple +
0.5 cm5 mm <br />0.005 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
subterete +, oblong +  and oblong-obovoid compressed +
fertile +  and bisexual +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
fertile +  and bisexual +
800–900 m +
strigoso-sericeous +  and hirsute +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Rocky hillsides +
disciform +  and discoid +
in loose , corymbiform or paniculiform arrays +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
turbinate;hemispheric +
0.9 cm9 mm <br />0.009 m <br /> (2 cm20 mm <br />0.02 m <br />) +
petiolate +  and sessile +
erect;spreading +
deltate +
Not (?) +  and Scarious (?) +
compressed +
2-carpellate +
Flowering Jun–Jul. +
3-nerved +  and 1-nerved +
hirsuto-villous +  and hirsute +
narrowly elliptic +  and linear-lanceolate +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
prostrate +  and decumbent +
appendaged +  and truncate +
papillate +  and smooth +
Achaetogeron +  and Trimorpha +
Erigeron poliospermus var. disciformis +
Erigeron poliospermus +
variety +
inflated +  and tubular +
90 cm900 mm <br />0.9 m <br /> (100 cm1,000 mm <br />1 m <br />) +
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
tree +, shrub +  and subshrub +