Eremogone hookeri

(Nuttall) W. A. Weber

Brittonia 33: 326. 1981.

Common names: Hooker’s sandwort
IllustratedEndemic
Basionym: Arenaria hookeri Nuttall in J. Torrey and A. Gray, Fl. N. Amer. 1: 178. 1838
Treatment appears in FNA Volume 5. Treatment on page 66. Mentioned on page 58, 67.
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Plants densely or loosely matted, green, not glaucous, somewhat woody at base. Stems erect, 1–15 (–20) cm, scabrid-puberulent. Leaves: basal leaves persistent; cauline leaves in 1–4 pairs, usually little overlapping, often larger than basal leaves; basal blades straight to arcuate-spreading, subulate to needlelike, 0.3–4 cm × 0.5–1.5 mm, flexible or rigid, herbaceous, apex spinose, glabrous, often glaucous. Inflorescences 3–30+-flowered, congested, capitate or subcapitate cymes. Pedicels 0.2–2 mm, scabrid-puberulent. Flowers: sepals 1–3-veined, often obscurely so, linear-lanceolate to lanceolate, (5–) 6–10 mm, not enlarging in fruit, margins narrow, apex narrowly acute or acuminate, glabrous or pubescent; petals white, oblanceolate, 4.5–8.5 mm, ± equaling sepals, apex rounded to obtuse; nectaries as lateral and abaxial mounds with transverse groove at base of filaments opposite sepals, 0.2–0.3 mm. Capsules to 4 mm, glabrous. Seeds black, ellipsoid-oblong to pyriform with hilar notch, 1.8–2 mm, tuberculate; tubercles rounded, elongate.

Distribution

V5 138-distribution-map.gif

Colo., Kans., Mont., N.Mex., Nebr., Nev., Okla., S.Dak., Utah, Wyo.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Basal leaf blades 0.3-1.5 cm, straight or recurved, rigid; sepals 5-8(-9) mm Eremogone hookeri var. hookeri
1 Basal leaf blades 2-4 cm, straight, rigid or flexible; sepals (7-)8-10 mm Eremogone hookeri var. pinetorum
... more about "Eremogone hookeri"
pubescent +, glabrous +  and glaucous +
rounded;obtuse +
Ronald L. Hartman +, Richard K. Rabeler +  and Frederick H. Utech +
(Nuttall) W. A. Weber +
0.3 cm3 mm <br />0.003 m <br /> (4 cm40 mm <br />0.04 m <br />) +
subulate +  and needlelike +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Arenaria hookeri +
filiform +  and subulate or narrowly linear +
not +  and succulent +
reduced +
ovoid;urceolate +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
often larger +
Hooker’s sandwort +
dish--shaped +
expanded +
Colo. +, Kans. +, Mont. +, N.Mex. +, Nebr. +, Nev. +, Okla. +, S.Dak. +, Utah +  and Wyo. +
straight +  and curved +
central +  and peripheral +
inconspicuous +
unisexual +  and bisexual +
stalked +  and simple +
disc--shaped +  and dish +
subcapitate +  and capitate +
connate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
swollen +
3 +  and 5 +
crassinucellate +  and bitegmic +
campylotropous +
scabrid-puberulent +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
fugacious +
oblanceolate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
tuberculate +
ellipsoid-oblong +  and pyriform +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
persistent +
connate +  and distinct +
linear-lanceolate;lanceolate +
not enlarging +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Illustrated +  and Endemic +
branched +  and simple +
15 cm150 mm <br />0.15 m <br /> (20 cm200 mm <br />0.2 m <br />) +
scabrid-puberulent +
1 cm10 mm <br />0.01 m <br /> (15 cm150 mm <br />0.15 m <br />) +
[50 +  and 3 +
smooth +  and papillate +
distinct +
filiform +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
stout +  and slender +
Eremogone hookeri +
Eremogone +
species +
ascending;recurved +
divided +
elongate +  and rounded +
10 +  and 8 +
rhizomatous +  and taprooted +
plant +  and matted +