Tetraneuris scaposa

(de Candolle) Greene

Pittonia 3: 266. 1898.

Illustrated
Basionyms: Cephalophora scaposa de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 663. 1836
Synonyms: Hymenoxys scaposa (de Candolle) K. F. Parker
Treatment appears in FNA Volume 21. Treatment on page 449. Mentioned on page 447.

Perennials, 14–40+ cm. Caudices often highly branched, branches not notably thickened distally. Stems 1–50, erect, sometimes branched near bases, sometimes densely woolly among proximal leaves. Leaves all basal-proximal (new leaves not tightly clustered); blades spatulate to oblanceolate to linear-oblanceolate or linear, entire or with 2 teeth or lobes, sparsely to densely hairy, ± glanddotted. Heads 1–50 per plant, borne singly or in fastigiate arrays. Peduncles 12–40 cm, ± hairy. Involucres 5–10 × 7–12 mm. Outer phyllaries 8–16, 3.8–6.6 mm, margins 0–0.2 (–0.4) mm wide, sometimes to often slightly scarious, abaxial faces ± hairy. Ray-florets 12–26; corollas 7.4–22 mm. Disc-florets 25–180+; corollas yellow, 2.5–3.5 mm. Cypselae 2–3 mm; pappi of 5–7 obovate to oblanceolate, aristate scales 1.6–2.3 mm.

Distribution

V21-1124-distribution-map.gif

Colo., Kans., N.Mex., Nebr., Okla., Tex., Mexico

Discussion

Varieties 2 (2 in the flora).

The name “Hymenoxys scaposa (de Candolle) K. F. Parker var. glabra (Nuttall) K. F. Parker” appears never to have been published. Parker did make the combination Hymenoxys acaulis (Pursh) K. F. Parker var. glabra (A. Gray) K. F. Parker based on Actinella scaposa (de Candolle) Nuttall var. glabra A. Gray, which she mistakenly called Actinea scaposa Nuttall var. glabra A. Gray.

Selected References

None.

Key

1 Stems not densely woolly among proximal leaves; leaves crowded (internodes not evident); Colorado, Kansas, Nebraska, New Mexico, Oklahoma, Texas Tetraneuris scaposa var. scaposa
1 Stems densely woolly among proximal leaves; leaves not crowded (internodes evident); Texas Tetraneuris scaposa var. argyrocaulon
... more about "Tetraneuris scaposa"
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 +
(de Candolle) Greene +
decurrent +
Cephalophora scaposa +
compound +  and simple +
spatulate;oblanceolate +
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 +
fertile +  and bisexual +
Colo. +, Kans. +, N.Mex. +, Nebr. +, Okla. +, Tex. +  and Mexico +
more or less +  and eglandular +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
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 />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
hemispheric;campanulate +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
sessile +  and petiolate +
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 />) +
11 +  and 60 +
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 50 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Hymenoxys scaposa +
Tetraneuris scaposa +
Tetraneuris +
species +
urceolate +  and campanulate +
dilated +
14 cm140 mm <br />0.14 m <br /> (40 cm400 mm <br />0.4 m <br />) +
shrub +  and subshrub +