Tetraneuris scaposa var. argyrocaulon

(K. F. Parker) K. F. Parker

Phytologia 45: 467. 1980.

Basionyms: Hymenoxys scaposa var. argyrocaulon K. F. Parker Phytologia 20: 192. 1970
Treatment appears in FNA Volume 21. Treatment on page 449.

Plants 17–40+ cm. Stems 1–20, densely woolly among proximal leaves. Leaves not crowded (internodes evident); blades linear, linear-oblanceolate, or oblanceolate, ± glanddotted. Involucres 6–10 × 9–12 mm. Ray corollas (7.4–) 9.5–14 mm. Disc corollas 2.5–3 mm. 2n = 30.


Phenology: Flowering Feb–Apr(–Jun; also Nov).
Habitat: Roadsides, pastures
Elevation: 100–200 m

Discussion

Selected References

None.

Lower Taxa

None.

not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Mark W. Bierner +  and Billie L. Turner +
(K. F. Parker) K. F. Parker +
decurrent +
Hymenoxys scaposa var. argyrocaulon +
compound +  and simple +
oblanceolate;linear-oblanceolate;oblanceolate;linear-oblanceolate;linear +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
obpyramidal +
fertile +  and bisexual +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
fertile +  and bisexual +
Tex. +  and Mexico (Tamaulipas) +
100–200 m +
more or less +  and eglandular +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Roadsides, pastures +
discoid +  and radiate +
in fastigiate arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
hemispheric;campanulate +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
sessile +  and petiolate +
not crowded +
basal-proximal +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
0mm +  and 0.2mm +
connate +  and distinct +
ovate +, oblong +, oblanceolate +, linear +, lanceolate +  and elliptic +
unequal +  and subequal +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.66 cm6.6 mm <br />0.0066 m <br />) +
2-carpellate +
persistent +
12 cm120 mm <br />0.12 m <br /> (40 cm400 mm <br />0.4 m <br />) +
Flowering Feb–Apr(–Jun +  and also Nov). +
11 +  and 60 +
0.74 cm7.4 mm <br />0.0074 m <br /> (0.95 cm9.5 mm <br />0.0095 m <br />) +
0.95 cm9.5 mm <br />0.0095 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
bearing subulate enations +, hairy +  and bristly +
hemispheric;conic +
5 +  and 7 +
aristate +, obovate +  and oblanceolate +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
exalbuminous +
Illustrated +
1 +  and 20 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Hymenoxys scaposa +
Tetraneuris scaposa var. argyrocaulon +
Tetraneuris scaposa +
variety +
urceolate +  and campanulate +
dilated +
14 cm140 mm <br />0.14 m <br /> (40 cm400 mm <br />0.4 m <br />) +