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.

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 +
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 +
? (?) +  and ? (?) +
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 +
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 +
0.5 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 +
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 +